Synchronous hydraulic driving system of double-pump control bending machine

Abstract

The utility model discloses a synchronous hydraulic driving system of a double-pump control bending machine, which comprises two hydraulic cylinders used for driving an upper die and a lower die of the bending machine to move, a hydraulic pump component used for providing power for the hydraulic cylinders, and a synchronous control system used for controlling the hydraulic cylinders to operate synchronously, a hydraulic pipe connected with the hydraulic pump assembly is installed on the top of the pump shell, and a hydraulic piston is slidably connected into the pump shell. The pressure stabilizing shell communicated with the pump shell is arranged on the side face of the pump shell, high-pressure gas in the pump shell can be conveyed into the pressure stabilizing shell through the communicating pipe when the pressure in the pump shell is large, and when the pressure in the pressure stabilizing shell is small, the high-pressure gas in the pump shell can be conveyed into the pressure stabilizing shell through the elastic force of the connecting spring. And the pressure in the pressure stabilizing shell is transmitted into the pump shell through the sealing plate, so that the stability of the pressure in the pump shell is ensured, and the stable operation of the hydraulic cylinder is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic drive of a bending machine, and particularly relates to a synchronous hydraulic drive system for a double-pump controlled bending machine. Background Technique

[0002] A bending machine is a machine that can bend thin plates. Hydraulic drive is the core component of the bending machine. The hydraulic cylinder includes a cylinder barrel and a piston. The cylinder barrel has a first inlet and outlet and a second inlet and outlet for hydraulic fluid. The piston is installed in the cylinder barrel. The piston is connected with a connecting rod. The hydraulic fluid flows in and out between the first inlet and the second outlet, which can drive the piston to run. The piston drives the connecting rod to run, and the hydraulic cylinder can do work on the outside.

[0003] For example, Chinese Patent No. CN104912871B discloses a self-relieving hydraulic cylinder and a steel bar bending machine. The self-relieving hydraulic cylinder includes a cylinder barrel and a piston. The piston has a hollow structure inside. There are a left inner protruding edge and a right inner protruding edge in the hollow structure. There are also a left conical block and a right conical block in the hollow structure. There is a groove for a spring between the left conical block and the right conical block, and the left conical block and the right conical block are connected by a spring. A section of ejector rod is fixedly connected behind the right conical block, and the right end of the ejector rod exceeds the right side of the piston. The connecting rod is installed on the left conical block. The steel bar bending machine includes a bending machine body. The bending machine body has a hydraulic cylinder, and the hydraulic cylinder is the above-mentioned hydraulic cylinder.

[0004] Although the above technical solution solves the corresponding technical problems, the above technical solution still has the following defects:

[0005] The above technical solution is not convenient for regulating the pressure in the hydraulic pump cylinder body, so it is difficult to ensure the stable operation of the hydraulic cylinder. Content of the Utility Model

[0006] The purpose of the utility model is to provide a synchronous hydraulic drive system for a double-pump controlled bending machine. By arranging a pressure stabilizing shell communicated with the pump shell on the side of the pump shell, when the pressure inside the pump shell is relatively large, the high-pressure gas inside the pump shell can be conveyed to the pressure stabilizing shell through a communicating pipe. When the pressure inside the pressure stabilizing shell is relatively small, under the elastic force of the connecting spring, the pressure inside the pressure stabilizing shell is transmitted to the pump shell through a sealing plate, thereby ensuring the stable pressure inside the pump shell and thus ensuring the stable operation of the hydraulic cylinder.

[0007] In order to achieve the above purpose, the main technical solutions adopted by the utility model include:

[0008] A synchronous hydraulic drive system for a double-pump controlled bending machine, comprising:

[0009] Two hydraulic cylinders for driving the upper and lower dies of a bending machine to move, a hydraulic pump assembly for providing power to the hydraulic cylinders, and a synchronous control system for controlling the synchronous operation of the hydraulic cylinders. The hydraulic cylinder includes a pump housing, and a hydraulic pipe connected to the hydraulic pump assembly is installed at the top of the pump housing. A hydraulic piston is slidably connected inside the pump housing, a hydraulic driving rod is installed at the bottom of the hydraulic piston, and a voltage stabilizing assembly for adjusting the pressure inside the pump housing is installed on the side of the pump housing.

[0010] For the synchronous hydraulic drive system of the above double-pump controlled bending machine, wherein the voltage stabilizing assembly includes a voltage stabilizing housing, the bottom of the side of the voltage stabilizing housing is interconnected with the pump housing through a connecting pipe, and a seal plate that can move up and down is arranged inside the voltage stabilizing housing.

[0011] For the synchronous hydraulic drive system of the above double-pump controlled bending machine, wherein an elastic telescopic assembly for controlling the up and down movement of the seal plate is installed at the top of the seal plate.

[0012] For the synchronous hydraulic drive system of the above double-pump controlled bending machine, wherein the elastic telescopic assembly includes a mounting housing fixedly connected to the top inner wall of the voltage stabilizing housing, a connecting spring is fixedly connected to the top of the inner wall of the mounting housing, a connecting slider is fixedly connected to the bottom of the connecting spring, a connecting sliding rod is fixedly connected to the bottom of the connecting slider, and the bottom of the connecting sliding rod is fixedly connected to the top of the seal plate.

[0013] For the synchronous hydraulic drive system of the above double-pump controlled bending machine, wherein a limiting assembly for limiting the hydraulic driving rod is installed at the bottom of the pump housing corresponding to the position of the hydraulic driving rod.

[0014] For the synchronous hydraulic drive system of the above double-pump controlled bending machine, wherein the limiting assembly includes a limiting sliding sleeve slidably connected to the hydraulic driving rod, L-shaped mounting rods are fixedly connected to both sides of the limiting sliding sleeve, and the other ends of the L-shaped mounting rods are fixedly connected to the bottom of the pump housing.

[0015] For the synchronous hydraulic drive system of the above double-pump controlled bending machine, wherein limiting sliding rods are fixedly connected to both sides of the top of the seal plate, limiting sleeves are installed on the top of the voltage stabilizing housing corresponding to the positions of the limiting sliding rods, and the tops of the two limiting sliding rods are fixedly connected through a connecting rod.

[0016] The utility model has at least the following beneficial effects:

[0017] The synchronous hydraulic drive system of the double-pump controlled bending machine provided by the present utility model is provided with a voltage stabilizing shell communicated with the pump shell on the side of the pump shell. When the pressure inside the pump shell is relatively large, the high-pressure gas inside the pump shell can be conveyed into the voltage stabilizing shell through the connecting pipe. When the pressure inside the voltage stabilizing shell is relatively small, under the elastic force of the connecting spring, the pressure inside the voltage stabilizing shell is transmitted into the pump shell through the sealing plate, thereby ensuring the stable pressure inside the pump shell and further ensuring the stable operation of the hydraulic cylinder. Description of the Drawings

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0019] Figure 1 It is a schematic structural diagram of the synchronous hydraulic drive system of the double-pump controlled bending machine of the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the hydraulic cylinder in the synchronous hydraulic drive system of the double-pump controlled bending machine of the present utility model;

[0021] Figure 3 It is a schematic cross-sectional structural diagram of the hydraulic cylinder in the synchronous hydraulic drive system of the double-pump controlled bending machine of the present utility model;

[0022] Figure 4 It is a schematic structural diagram of the limit component in the synchronous hydraulic drive system of the double-pump controlled bending machine of the present utility model;

[0023] Figure 5 It is a schematic structural diagram of the voltage stabilizing component in the synchronous hydraulic drive system of the double-pump controlled bending machine of the present utility model;

[0024] Figure 6 It is a schematic structural diagram of the elastic telescopic component in the synchronous hydraulic drive system of the double-pump controlled bending machine of the present utility model.

[0025] Description of the Reference Numerals in the Drawings:

[0026] 1. Hydraulic cylinder; 2. Hydraulic pump assembly; 3. Synchronous control system;

[0027] 11. Pump shell; 101. Hydraulic pipe; 102. Hydraulic piston; 103. Hydraulic drive rod; 104. Voltage stabilizing component;

[0028] 1031. Limit component;

[0029] 10311. Limit sliding sleeve; 10312. L-shaped mounting rod;

[0030] 1041. Pressure stabilizing housing; 1042. Connecting pipe; 1043. Sealing plate; 1044. Elastic telescopic assembly;

[0031] 10441. Installation housing; 10442. Connecting spring; 10443. Connecting slider; 10444. Connecting slide bar;

[0032] 10431. Limiting slide bar; 10432. Limiting sleeve; 10433. Connecting rod. Detailed implementation mode

[0033] The following will cooperate with the drawings and embodiments to detail the implementation mode of the present application, so as to fully understand how the present application uses technical means to solve technical problems and achieve the implementation process of technical effects and implement accordingly.

[0034] Please refer to Figures 1 to 6 As shown, an embodiment of the present utility model provides a synchronous hydraulic drive system for a double-pump controlled bending machine, including: two hydraulic cylinders 1 for driving the upper and lower dies of the bending machine to move, a hydraulic pump assembly 2 for providing power to the hydraulic cylinders 1, and a synchronous control system 3 for controlling the synchronous operation of the hydraulic cylinders 1. The hydraulic cylinder 1 includes a pump housing 11. A hydraulic pipe 101 connected to the hydraulic pump assembly 2 is installed on the top of the pump housing 11. A hydraulic piston 102 is slidably connected inside the pump housing 11. A hydraulic drive rod 103 is installed at the bottom of the hydraulic piston 102. A pressure stabilizing assembly 104 for adjusting the pressure inside the pump housing 11 is installed on the side of the pump housing 11;

[0035] Among them, the hydraulic cylinder 1 is connected to the upper and lower dies of the bending machine. The hydraulic cylinder 1 drives the up and down movement of the die by receiving hydraulic oil from the hydraulic pump. Usually, two hydraulic pumps are used, one is the main pump and the other is the auxiliary pump. The main pump provides the main power, while the auxiliary pump is used to compensate for the leakage of the system and provide precise flow control. At the same time, the synchronous control system 3 ensures the synchronous movement of the two hydraulic cylinders 1 through an electronic control system or a mechanical link system. The electronic control system usually uses sensors to monitor the position and speed of the hydraulic cylinder 1 and adjusts the output of the hydraulic pump through a controller to achieve precise synchronization.

[0036] Among them, in order to more comprehensively understand the synchronous hydraulic drive system of the double-pump controlled bending machine provided by the present utility model, the specific composition and working principle of the hydraulic pump assembly 2 and the synchronous control system 3 will be elaborated in detail below.

[0037] Hydraulic pump assembly 2

[0038] Constituent parts:

[0039] Main pump: As the main power source, the main pump is responsible for providing most of the hydraulic energy to drive hydraulic cylinder 1. It usually adopts high-performance and highly reliable hydraulic pumps, such as piston pumps or gear pumps, to ensure continuous and stable oil pressure output.

[0040] Auxiliary pump: The auxiliary pump is used to compensate for system leakage and perform precise flow control when needed. Its flow rate and pressure output can be adjusted according to system requirements to improve the overall efficiency and response speed of the system. The auxiliary pump can also adopt piston pumps, gear pumps or other pump types suitable for low-pressure and small-flow applications.

[0041] Oil tank: Used to store hydraulic oil and serve as a container for cooling and sedimentation of impurities in the hydraulic system. A filtering device is installed in the oil tank to ensure the cleanliness of the oil and extend the service life of the system.

[0042] Oil filtration system: Composed of components such as filters and strainers, it is used to filter impurities and particulate matter in the oil to keep the oil clean and ensure the normal operation of the system.

[0043] Cooling system: For high-power or long-running hydraulic systems, a cooling system such as a radiator and cooling fan may be required to prevent excessive oil temperature from affecting system performance and service life.

[0044] Working principle:

[0045] When the hydraulic pump assembly 2 is working, the main pump sucks hydraulic oil from the oil tank and outputs high-pressure oil through pressure conversion to hydraulic cylinder 1. The auxiliary pump adjusts its output according to system requirements to compensate for leakage and precisely control the flow rate. The oil circulates in the system, returns to the oil tank after filtration and cooling, forming a closed-loop system.

[0046] Synchronization control system 3

[0047] Components:

[0048] Electronic control unit (ECU): As the core of the synchronization control system, the ECU is responsible for receiving signals from various sensors, processing and analyzing them. According to the preset control algorithm, the ECU sends control commands to the hydraulic pump to adjust its output to achieve the synchronous movement of the hydraulic cylinders.

[0049] Position sensors: Installed on hydraulic cylinder 1, they are used to monitor the position information of the hydraulic cylinder in real time. These sensors can be photoelectric sensors, magnetic induction sensors, etc., which can accurately feedback the position data of the hydraulic cylinder to the ECU.

[0050] Speed sensors (optional): Used to measure the movement speed of the hydraulic cylinder. When used in conjunction with position sensors, they can more precisely control the synchronization of the hydraulic cylinders.

[0051] Actuator: It includes a solenoid valve for controlling the output pressure of the hydraulic pump, a throttle valve for regulating the flow rate, etc. It performs corresponding actions according to the instructions of the ECU to adjust the driving force and speed of the hydraulic cylinder.

[0052] Working principle:

[0053] When the synchronous control system 3 is working, first, the real-time position information of the two hydraulic cylinders is obtained through the position sensors and sent to the ECU. The ECU calculates the position deviation and speed deviation between the two hydraulic cylinders according to the preset synchronous control strategy. Then, the ECU sends control instructions to the hydraulic pump assembly 2. By adjusting parameters such as the output pressure and flow rate of the main pump and the auxiliary pump, the driving force and speed of the two hydraulic cylinders gradually tend to be the same, and finally, synchronous movement is achieved. During the whole process, the ECU continuously receives the information fed back by the sensors and makes real-time adjustments and optimizes the control strategy to ensure the synchronous accuracy and stability of the hydraulic cylinders.

[0054] It should be noted that both the hydraulic pump assembly 2 and the synchronous control system 3 are existing technologies. Therefore, no more detailed introduction will be made here.

[0055] Please refer to Figures 1 to 6 As shown, the voltage stabilizing component 104 includes a voltage stabilizing shell 1041. The bottom of the side of the voltage stabilizing shell 1041 is interconnected with the pump shell 11 through a connecting pipe 1042, and a liftable and movable sealing plate 1043 is arranged inside the voltage stabilizing shell 1041.

[0056] Please refer to Figures 1 to 6 As shown, an elastic telescopic component 1044 for controlling the lifting and moving of the sealing plate 1043 is installed on the top of the sealing plate 1043.

[0057] Please refer to Figures 1 to 6 As shown, the elastic telescopic component 1044 includes a mounting shell 10441 fixedly connected to the top inner wall of the voltage stabilizing shell 1041. A connecting spring 10442 is fixedly connected to the top of the inner wall of the mounting shell 10441. The bottom of the connecting spring 10442 is fixedly connected to a connecting slider 10443. The bottom of the connecting slider 10443 is fixedly connected to a connecting slide bar 10444. The bottom of the connecting slide bar 10444 is fixedly connected to the top of the sealing plate 1043.

[0058] Please refer to Figures 1 to 6 As shown, a limiting component 1031 for limiting the hydraulic driving rod 103 is installed at the bottom of the pump shell 11 corresponding to the position of the hydraulic driving rod 103.

[0059] Among them, the limiting component 1031 includes a limiting sliding sleeve 10311 slidably connected to the hydraulic driving rod 103. L-shaped mounting rods 10312 are fixedly connected to both sides of the limiting sliding sleeve 10311, and the other ends of the L-shaped mounting rods 10312 are fixedly connected to the bottom of the pump housing 11;

[0060] By adopting the above technical solution, the limiting component 1031 is arranged to limit the hydraulic driving rod 103, thereby increasing the stability of the movement of the hydraulic driving rod 103.

[0061] Please refer to Figures 1 to 6 As shown, limiting sliding rods 10431 are fixedly connected to both sides of the top of the sealing plate 1043. Limiting sleeves 10432 are installed at the top of the pressure stabilizing housing 1041 corresponding to the positions of the limiting sliding rods 10431, and the tops of the two limiting sliding rods 10431 are fixedly connected by a connecting rod 10433;

[0062] By adopting the above technical solution, the limiting sliding rods 10431, the limiting sleeves 10432 and the connecting rod 10433 are arranged to limit the sealing plate 1043, thereby increasing the stability of the reciprocating movement of the sealing plate 1043.

[0063] The working principle of the present utility model is: by arranging a pressure stabilizing housing 1041 communicated with the pump housing 11 on the side of the pump housing 11, when the pressure inside the pump housing 11 is relatively large, the high-pressure gas inside the pump housing 11 can be conveyed to the pressure stabilizing housing 1041 through the connecting pipe 1042. When the pressure inside the pressure stabilizing housing 1041 is relatively small, under the elastic force of the connecting spring 10442, the pressure inside the pressure stabilizing housing 1041 is transmitted to the pump housing 11 through the sealing plate 1043, thereby ensuring the stability of the pressure inside the pump housing 11 and thus ensuring the stable operation of the hydraulic cylinder 1.

[0064] The above description shows and describes several preferred embodiments of the present utility model. However, as mentioned above, it should be understood that the present utility model is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A synchronous hydraulic drive system for a double-pump-controlled bending machine, comprising two hydraulic cylinders (1) for driving the upper and lower dies of the bending machine to move, a hydraulic pump assembly (2) for providing power to the hydraulic cylinders (1), and a synchronous control system (3) for controlling the synchronous operation of the hydraulic cylinders (1), characterized in that, The hydraulic cylinder (1) includes a pump housing (11). A hydraulic pipe (101) connected to the hydraulic pump assembly (2) is installed at the top of the pump housing (11). A hydraulic piston (102) is slidably connected inside the pump housing (11). A hydraulic driving rod (103) is installed at the bottom of the hydraulic piston (102). A pressure stabilizing assembly (104) for adjusting the pressure inside the pump housing (11) is installed on the side of the pump housing (11).

2. The synchronous hydraulic drive system of a double-pump-controlled bending machine according to claim 1, characterized in that: The pressure stabilizing assembly (104) includes a pressure stabilizing housing (1041). The bottom of the side of the pressure stabilizing housing (1041) is interconnected with the pump housing (11) through a connecting pipe (1042), and a seal plate (1043) that can move up and down is arranged inside the pressure stabilizing housing (1041).

3. The synchronous hydraulic drive system of a double-pump controlled bending machine according to claim 2, characterized in that: An elastic telescopic assembly (1044) for controlling the up and down movement of the seal plate (1043) is installed at the top of the seal plate (1043).

4. The synchronous hydraulic drive system of a double-pump controlled bending machine according to claim 3, characterized in that: The elastic telescopic assembly (1044) includes a mounting housing (10441) fixedly connected to the top inner wall of the pressure stabilizing housing (1041). A connecting spring (10442) is fixedly connected to the top of the inner wall of the mounting housing (10441). A connecting slider (10443) is fixedly connected to the bottom of the connecting spring (10442). A connecting slide rod (10444) is fixedly connected to the bottom of the connecting slider (10443). The bottom of the connecting slide rod (10444) is fixedly connected to the top of the seal plate (1043).

5. The synchronous hydraulic drive system of a double-pump-controlled bending machine according to claim 4, characterized in that: A limiting assembly (1031) for limiting the hydraulic driving rod (103) is installed at the bottom of the pump housing (11) corresponding to the position of the hydraulic driving rod (103).

6. The synchronous hydraulic drive system of a double-pump controlled bending machine according to claim 5, characterized in that: The limiting assembly (1031) includes a limiting sliding sleeve (10311) slidably connected to the hydraulic driving rod (103). L-shaped mounting rods (10312) are fixedly connected to both sides of the limiting sliding sleeve (10311), and the other ends of the L-shaped mounting rods (10312) are fixedly connected to the bottom of the pump housing (11).

7. The synchronous hydraulic drive system of a double-pump controlled bending machine according to claim 6, characterized in that: Limiting slide rods (10431) are fixedly connected to both sides of the top of the seal plate (1043). Limiting sleeves (10432) are installed at the top of the pressure stabilizing housing (1041) corresponding to the positions of the limiting slide rods (10431). The tops of the two limiting slide rods (10431) are fixedly connected through a connecting rod (10433).

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