Overload device for machine tongs

Abstract

This utility model relates to the technical field of machine clamps, and in particular to an overload protection device for machine clamps. It clamps and fixes the workpiece through a clamping device, enables the equipment to quickly release pressure through a pressure relief device, and facilitates the opening and closing of the pressure relief device through a control device, thereby improving the practicality of the device. It includes a clamping device, a pressure relief device, and a control device. The pressure relief device is installed on the clamping device, and the control device is installed on the clamping device.

Description

Technical Field

[0001] This utility model relates to the technical field of machine pliers, and in particular to an overload protection device for machine pliers. Background Technology

[0002] Machine pliers are specialized tools used in industrial automation and machinery manufacturing for gripping, clamping, positioning, or applying force. Integrated with mechanical equipment, they enable high-precision and high-efficiency workpiece manipulation. Their core design focuses on rigidity, durability, load capacity, and automation adaptability, differing significantly from handheld manual pliers in structure, function, and application scenarios. Overload protection devices on machine pliers are crucial components for ensuring the safe operation of mechanical equipment. Their core function is to monitor and limit the load on the pliers body mechanically or electronically, preventing tool damage or safety accidents caused by overload.

[0003] The prior art Chinese utility model patent with application number CN202020125326.8 relates to a flat-jaw pliers for a hydraulic press, including a base, a rotating plate, a threaded rod, a clamping plate, and a fixing plate, which can prevent continuous pressure from damaging the object during clamping.

[0004] However, the above-mentioned devices do not have overload protection capabilities or the ability to quickly release clamping pressure in actual use. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a machine clamp overload protection device that uses a clamping device to clamp and fix the workpiece, a pressure relief device to enable the equipment to quickly release pressure, and a control device to facilitate the opening and closing of the pressure relief device, thereby improving the practicality of the device.

[0006] This utility model discloses an overload protection device for machine clamps, comprising a clamping device, a pressure relief device, and a control device. The pressure relief device is installed on the clamping device, and the control device is installed on the clamping device. The clamping device clamps and fixes the workpiece, the pressure relief device enables the equipment to quickly release pressure, and the control device facilitates the opening and closing of the pressure relief device, thus improving the practicality of the device.

[0007] Preferably, the clamping device includes a frame, a hydraulic cylinder, limiting rods, a transverse block, a movable clamping plate, a fixed clamping plate, and fastening bolts. A hydraulic cylinder is mounted on the right end face of the frame. A chamber is provided inside the frame, in which the transverse block and two sets of limiting rods are installed. The movable end of the hydraulic cylinder passes through the side of the frame and connects to the transverse block. Both sets of limiting rods pass through the main body of the transverse block. A strip-shaped hole is provided on the top surface of the chamber. The upper end face of the transverse block extends through the strip-shaped hole of the chamber to the upper side of the frame and connects to the movable clamping plate. A connecting slot is provided on the left side of the upper end face of the frame, and the fixed clamping plate... The lower part is inserted into the connecting slot of the frame. The left end face of the fixed clamping plate is provided with multiple sets of circular holes. The left end face of the frame is provided with multiple sets of threaded holes corresponding to the multiple sets of circular holes on the fixed clamping plate. Multiple sets of fastening bolts pass through the left end face of the frame and extend into the circular holes of the fixed clamping plate. The extension of the hydraulic cylinder is controlled to drive the transverse block to move left and right, thereby cooperating with the fixed clamping plate to clamp and fix the workpiece. The movement of the transverse block is limited by two sets of limit rods, which reduces the vibration amplitude of the moving clamping plate during movement and improves the stability and practicality of the device.

[0008] Preferably, the pressure relief device includes a three-way connector, an oil reservoir, and a solenoid valve. One set of output ends of the three-way connector is connected to the pressure inlet of the hydraulic cylinder, and the input end of the three-way connector is connected to the hydraulic pump station. An oil reservoir is installed on the right end face of the frame, and a solenoid valve is installed on the oil inlet of the oil reservoir. The other set of output ends of the three-way connector is connected to the input end of the solenoid valve. By opening the solenoid valve, the high-pressure oil in the three-way connector and the hydraulic cylinder flows rapidly into the oil reservoir for storage, thereby quickly reducing the pushing pressure of the hydraulic cylinder, preventing equipment overload and damage to the equipment or workpiece, and improving the practicality of the device.

[0009] Preferably, the device also includes a pressure sensor and a vibration sensor. A pressure sensor is installed on the moving end of the hydraulic cylinder, and a vibration sensor is installed on the right end face of the moving clamping plate. The pressure sensor monitors the pressure on the moving end of the hydraulic cylinder, and the vibration sensor monitors the vibration intensity of the moving clamping plate during clamping. This allows operators to understand the operating status of the equipment, reduces the occurrence of overload, and improves the practicality of the device.

[0010] Preferably, the control device includes a fixed protective box, a battery, a PLC controller, an emergency stop button, and a flip-top protective cover. The fixed protective box is mounted on the right end face of the frame, and the battery and PLC controller are installed inside. Pressure and vibration sensors transmit data to the fixed protective box. The fixed protective box controls the opening and closing of the solenoid valve. A door is provided on the right side of the fixed protective box, and a flip-top protective cover is installed on the door. An emergency stop button is installed inside the flip-top protective cover. The flip-top protective cover protects the emergency stop button, reducing accidental activation. The operator presses the emergency stop button, which causes the PLC controller to control the solenoid valve to complete the pressure relief operation. The PLC controller receives monitoring data from the pressure and vibration sensors. When a sudden and severe vibration occurs or the pressure at the moving end of the hydraulic cylinder exceeds a preset value, the fixed protective box controls the solenoid valve to open, and the battery provides temporary power to the equipment's electrical components, improving the practicality of the device.

[0011] Preferably, it also includes a funnel-shaped bottom and an oil drain bolt. The bottom of the oil storage tank is provided with a funnel-shaped bottom, and an oil drain port is provided on the bottom end face of the funnel-shaped bottom. An oil drain bolt is installed on the oil drain port. The funnel-shaped bottom reduces the oil residue on the bottom edge of the oil storage tank during the oil draining process, and the oil drain bolt facilitates the control of the oil discharge in the oil storage tank, thereby improving the practicality of the device.

[0012] Preferably, it also includes an exhaust valve, which is installed on the upper surface of the oil tank; during the depressurization process, the exhaust valve quickly discharges the gas in the oil tank, reducing the impact of the increased gas pressure in the oil tank on the depressurization process and improving the practicality of the device.

[0013] Compared with the prior art, the advantages of this utility model are as follows: the workpiece is clamped and fixed by the clamping device, the pressure relief device enables the equipment to have the ability to quickly relieve pressure, and the control device facilitates the opening and closing of the pressure relief device, thus improving the practicality of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first isometric structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the second isometric structure of this utility model;

[0016] Figure 3 This is a first cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a schematic diagram of the second cross-sectional structure of this utility model;

[0018] The following components are labeled in the attached diagram: 1. Frame; 2. Hydraulic cylinder; 3. Limiting rod; 4. Transverse block; 5. Moving clamping plate; 6. Fixed clamping plate; 7. Fastening bolt; 8. T-connector; 9. Oil tank; 10. Solenoid valve; 11. Pressure sensor; 12. Vibration sensor; 13. Fixed protective box; 14. Battery; 15. PLC controller; 16. Emergency stop button; 17. Flip-top protective shell; 18. Bucket-shaped bottom; 19. Oil drain bolt; 20. Exhaust valve. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0020] Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the pressure relief device is installed on the clamping device, and the control device is installed on the clamping device;

[0021] First, the extension of hydraulic cylinder 2 is controlled to drive the transverse block 4 to move left and right, thereby cooperating with the fixed clamping plate 6 to clamp and fix the workpiece. The pressure sensor 11 monitors the pressure on the moving end of hydraulic cylinder 2, and the vibration sensor 12 monitors the vibration intensity of the moving clamping plate 5 during the clamping process. The flip-cover protective shell 17 provides protection for the emergency button 16 to reduce accidental activation. The operator presses the emergency button 16 to cause the PLC controller 15 to control the solenoid valve 10 to complete the pressure relief operation. The PLC controller 15 receives the monitoring data from the pressure sensor 11 and the vibration sensor 12. When a sudden violent vibration occurs or the pressure on the moving end of hydraulic cylinder 2 exceeds the preset value, the fixed protective box 13 controls the solenoid valve 10 to open, and the battery 14 provides temporary power to the electrical components of the equipment. When pressure relief is required, the solenoid valve 10 is opened to allow the high-pressure oil in the three-way connector 8 and hydraulic cylinder 2 to flow quickly into the oil storage tank 9 for storage.

[0022] The clamping device includes a frame 1, a hydraulic cylinder 2, limiting rods 3, a transverse block 4, a movable clamping plate 5, a fixed clamping plate 6, and fastening bolts 7. The hydraulic cylinder 2 is mounted on the right end face of the frame 1. A chamber is provided inside the frame 1, in which the transverse block 4 and two sets of limiting rods 3 are installed. The movable end of the hydraulic cylinder 2 passes through the side of the frame 1 and connects to the transverse block 4. Both sets of limiting rods 3 pass through the main body of the transverse block 4. A strip-shaped hole is provided on the top surface of the chamber. The upper part of the transverse block 4... The end face extends through the slotted hole of the chamber to the upper side of the frame 1 and connects with the movable clamping plate 5. A connecting slot is provided on the left side of the upper end face of the frame 1. The lower part of the fixed clamping plate 6 is inserted into the connecting slot of the frame 1. Multiple sets of circular holes are provided on the left end face of the fixed clamping plate 6. Multiple sets of threaded holes are provided on the left end face of the frame 1 corresponding to the multiple sets of circular holes on the fixed clamping plate 6. Multiple sets of fastening bolts 7 extend through the left end face of the frame 1 into the circular holes of the fixed clamping plate 6.

[0023] The pressure relief device includes a three-way connector 8, an oil reservoir 9, and a solenoid valve 10. One set of output ends of the three-way connector 8 is connected to the pressure inlet of the hydraulic cylinder 2, and the input end of the three-way connector 8 is connected to the hydraulic pump station. An oil reservoir 9 is installed on the right end face of the frame 1, and a solenoid valve 10 is installed on the oil inlet of the oil reservoir 9. The other set of output ends of the three-way connector 8 is connected to the input end of the solenoid valve 10.

[0024] It also includes a pressure sensor 11 and a vibration sensor 12. The pressure sensor 11 is installed on the moving end of the hydraulic cylinder 2, and the vibration sensor 12 is installed on the right end face of the moving clamping plate 5.

[0025] The control device includes a fixed protective box 13, a storage battery 14, a PLC controller 15, an emergency button 16, and a flip-top protective shell 17. The fixed protective box 13 is installed on the right end face of the frame 1. The storage battery 14 and the PLC controller 15 are installed inside the fixed protective box 13. The pressure sensor 11 and the vibration sensor 12 transmit data to the fixed protective box 13. The fixed protective box 13 controls the opening and closing of the solenoid valve 10. A door is provided on the right side of the fixed protective box 13. The flip-top protective shell 17 is installed on the door. The emergency button 16 is installed inside the flip-top protective shell 17.

[0026] It also includes a funnel-shaped bottom 18 and an oil drain bolt 19. The bottom of the oil storage tank 9 is provided with a funnel-shaped bottom 18, and an oil drain port is provided on the bottom end face of the funnel-shaped bottom 18. An oil drain bolt 19 is installed on the oil drain port.

[0027] It also includes an exhaust valve 20. An exhaust valve 20 is installed on the upper surface of the oil tank 9. The workpiece is clamped and fixed by the clamping device. The pressure relief device enables the equipment to quickly relieve pressure. The control device facilitates the opening and closing of the pressure relief device, thus improving the practicality of the device.

[0028] like Figures 1 to 4As shown, this utility model discloses a machine clamp overload protection device. During operation, the extension of the hydraulic cylinder 2 is controlled to move the transverse block 4 left and right, thereby cooperating with the fixed clamping plate 6 to clamp and fix the workpiece. The pressure sensor 11 monitors the pressure on the moving end of the hydraulic cylinder 2, and the vibration sensor 12 monitors the vibration intensity of the moving clamping plate 5 during clamping. The flip-top protective shell 17 protects the emergency button 16, reducing accidental activation. The operator presses the emergency button 16, causing the PLC controller 15 to control the solenoid valve 10 to complete the pressure relief operation. The PLC controller 15 receives the monitoring data from the pressure sensor 11 and the vibration sensor 12. When a sudden, severe vibration occurs or the pressure on the moving end of the hydraulic cylinder 2 exceeds a preset value, the fixed protective box 13 controls the solenoid valve 10 to open, providing temporary power to the equipment's electrical components via the battery 14. When pressure relief is needed, the solenoid valve 10 is opened, allowing the high-pressure oil in the three-way connector 8 and the hydraulic cylinder 2 to quickly flow into the oil storage tank 9 for storage.

[0029] The pressure sensor 11, vibration sensor 12, hydraulic cylinder 2, solenoid valve 10, PLC controller 15, storage battery 14 and emergency button 16 of the machine clamp overload protection device of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An overload protection device for machine clamps; characterized in that, The device includes a clamping device, a pressure relief device, and a control device. The pressure relief device is installed on the clamping device, and the control device is installed on the clamping device. The clamping device includes a frame (1), a hydraulic cylinder (2), a limiting rod (3), a transverse block (4), a movable clamping plate (5), a fixed clamping plate (6), and fastening bolts (7). The hydraulic cylinder (2) is installed on the right end face of the frame (1). A chamber is provided inside the frame (1). The transverse block (4) and two sets of limiting rods (3) are installed in the chamber. The movable end of the hydraulic cylinder (2) passes through the side of the frame (1) and connects to the transverse block (4). The two sets of limiting rods (3) All pass through the main body of the transverse block (4). A strip hole is provided on the top surface of the chamber. The upper end of the transverse block (4) extends through the strip hole of the chamber to the upper side of the frame (1) and connects with the moving clamping plate (5). A connecting slot is provided on the left side of the upper end of the frame (1). The lower part of the fixed clamping plate (6) is inserted into the connecting slot of the frame (1). Multiple sets of circular holes are provided on the left end of the fixed clamping plate (6). Multiple sets of threaded holes are provided on the left end of the frame (1) corresponding to the multiple sets of circular holes on the fixed clamping plate (6). Multiple sets of fastening bolts (7) pass through the left end of the frame (1). Extending into the circular hole of the fixed clamping plate (6); the pressure relief device includes a three-way connector (8), an oil tank (9) and a solenoid valve (10). One set of output ends of the three-way connector (8) is connected to the pressure inlet of the hydraulic cylinder (2), and the input end of the three-way connector (8) is connected to the hydraulic pump station. An oil tank (9) is installed on the right end face of the frame (1). A solenoid valve (10) is installed on the oil inlet of the oil tank (9). The other set of output ends of the three-way connector (8) is connected to the input end of the solenoid valve (10); the control device includes a fixed protective box (13), a battery (14), and a PLC controller. (15), emergency button (16) and flip-top protective shell (17), a fixed protective box (13) is installed on the right end face of the frame (1), a battery (14) and a PLC controller (15) are installed inside the fixed protective box (13), a pressure sensor (11) and a vibration sensor (12) transmit data to the fixed protective box (13), the fixed protective box (13) controls the opening and closing of the solenoid valve (10), a door is provided on the right side of the fixed protective box (13), a flip-top protective shell (17) is installed on the door, and an emergency button (16) is installed inside the flip-top protective shell (17).

2. The machine clamp overload protection device as described in claim 1, characterized in that, It also includes a pressure sensor (11) and a vibration sensor (12). The pressure sensor (11) is installed on the moving end of the hydraulic cylinder (2), and the vibration sensor (12) is installed on the right end face of the moving clamping plate (5).

3. The machine clamp overload protection device as described in claim 2, characterized in that, It also includes a funnel-shaped bottom (18) and an oil drain bolt (19). The bottom of the oil storage tank (9) is provided with a funnel-shaped bottom (18), and an oil drain port is provided on the bottom end face of the funnel-shaped bottom (18). An oil drain bolt (19) is installed on the oil drain port.

4. The machine clamp overload protection device as described in claim 3, characterized in that, It also includes an exhaust valve (20), which is installed on the upper surface of the oil tank (9).

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