An integrated modular hydraulic clamping device

Abstract

The utility model discloses an integrated modularization hydraulic clamping device relates to hydraulic system technical field, including power unit, executive element, main valve block and module control valve group, the power unit is used for output pressure oil source, the executive element is provided with oil inlet and oil outlet, main valve block sets up between power unit with executive element, main valve block is used for distributing and flow direction adjustment to the pressure oil from power unit, makes pressure oil guide to the oil inlet of executive element, module control valve group with the oil outlet connection of executive element, module control valve group is used for controlling the unloading action of executive element under different working conditions. The integrated modularization hydraulic clamping device of the utility model can better adapt to the application demand of compact tooling or high density production line, effectively reduces the energy consumption and manufacturing cost of whole hydraulic clamping device as a whole.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, specifically to an integrated modular hydraulic clamping device. Background Technology

[0002] In fields such as machining, automated assembly, and heavy equipment manufacturing, hydraulic clamping systems serve as core tooling equipment, undertaking the crucial functions of workpiece positioning and clamping. They convert the mechanical energy driven by an electric motor into hydraulic pressure through hydraulic transmission, driving the clamping actuators (such as hydraulic cylinders and grippers) to reliably fix the workpiece, ensuring the workpiece's positional accuracy and stability during machining. With advantages such as high clamping force, fast response speed, and strong adaptability, hydraulic clamping systems are widely used in CNC machine tools, presses, welding fixtures, and other scenarios, becoming an important technical means to improve machining efficiency and product quality.

[0003] However, to meet the requirements of rapid clamping, existing clamping systems typically increase the oil supply capacity by increasing the specifications of the motor and pump, resulting in bulky equipment, high manufacturing costs, and low energy utilization, making it difficult to adapt to the application requirements of compact tooling or high-density production lines. At the same time, existing clamping systems use a single dedicated valve group design, requiring the redevelopment of modular control valve groups for different products in the same series, which leads to extended product design cycles, complex inventory management, lack of interchangeability of field valve groups, and high maintenance and upgrade costs. Utility Model Content

[0004] Therefore, in order to solve the problems of high energy consumption and high cost of traditional clamping systems, the purpose of this utility model is to provide an integrated modular hydraulic clamping device, the specific technical solution of which is as follows: An integrated modular hydraulic clamping device includes: The power unit is used to output a pressure oil source; An actuator, wherein the actuator is provided with an oil inlet and an oil outlet; A main valve block is disposed between the power unit and the actuator. The main valve block is used to distribute and regulate the flow direction of the pressure oil from the power unit, so that the pressure oil is directed to the oil inlet of the actuator. A modular control valve assembly is connected to the oil outlet of the actuator and is used to control the unloading action of the actuator under different operating conditions.

[0005] In some embodiments, the module control valve group includes a quick unloading valve group for quickly unloading the actuator. The quick unloading valve group is connected to the oil outlet of the actuator and the power unit. Under the condition of quick unloading, a hydraulic oil circuit structure is formed in which pressurized oil flows from the oil outlet of the actuator back to the power unit through the quick unloading valve group.

[0006] In some embodiments, the module control valve group includes a slow unloading valve group and a buffer valve group. The slow unloading valve group is used to slowly unload the actuator, and the buffer valve group is used to regulate the return rate of the pressure oil after passing through the slow unloading valve group. The slow unloading valve group and the buffer valve group are connected in series, and the buffer valve group is connected to the power unit. Under the slow unloading condition, a hydraulic circuit structure is formed in which the pressure oil flows from the outlet of the actuator through the slow unloading valve group and the buffer valve group back to the power unit.

[0007] In some embodiments, the buffer valve assembly, the fast unloading valve assembly, and the slow unloading valve assembly are detachably connected, the buffer valve assembly is disposed between the fast unloading valve assembly and the slow unloading valve assembly, and the slow unloading valve assembly is disposed close to the buffer valve assembly.

[0008] In some embodiments, the fast unloading valve assembly is configured as a first solenoid valve, and the slow unloading valve assembly is configured as a second solenoid valve, wherein the nominal diameter of the first solenoid valve is larger than the nominal diameter of the second solenoid valve.

[0009] In some implementations, an accumulator is included, which is connected to the main valve block, and can provide short-term pressure support when the power unit stops or when there is insufficient pressure due to pressure leakage from the actuator.

[0010] In some embodiments, a pressure sensor is provided on the main valve block, the pressure sensor being located on the outlet oil line of the accumulator, and the pressure sensor being used to monitor the pressure of the accumulator in real time.

[0011] In some embodiments, a safety valve is provided in the main valve block. When the system pressure rises abnormally to a value exceeding a set value, the safety valve opens, and the oil in the system is depressurized through the safety valve.

[0012] In some embodiments, the power unit includes an oil tank, a motor, and a hydraulic pump. The input end of the hydraulic pump is connected to the oil tank to provide a pressure oil source for the system. The motor is connected to the hydraulic pump to drive the hydraulic pump.

[0013] In some embodiments, the power unit includes a manual pump, the input of which is connected to the power unit, and the output of which is connected to the input of the main valve block. The manual pump is used to provide a pressure oil source for the system.

[0014] Compared with existing technologies, this utility model's integrated modular hydraulic clamping device has the following advantages: The power unit, as the power source of the entire hydraulic clamping device, provides the system with pressurized oil. The actuator is used to complete the clamping operation. The main valve block is located between the power unit and the actuator, enabling precise distribution and flow regulation of the pressurized oil from the power unit. The modular control valve group can precisely control the unloading action of the actuator under different working conditions. It can reasonably adjust the unloading timing and speed of the actuator according to actual working needs, avoiding unnecessary energy consumption and further improving energy utilization. It also helps extend the service life of the actuator. The modular design concept makes the modular control valve group universal and interchangeable. For different products in the same series, there is no need to develop entirely new modular control valve groups; only existing modules need to be combined or adjusted according to specific needs. When a module fails, a spare module can be quickly replaced, reducing downtime and maintenance costs. Moreover, when upgrading the system, only the corresponding module needs to be upgraded, without large-scale modification of the entire system, reducing upgrade costs. The integrated modular hydraulic clamping device of this utility model can better adapt to the application needs of compact tooling or high-density production lines. It effectively reduces the energy consumption and manufacturing cost of the entire hydraulic clamping device. The modular control valve group has universality and interchangeability, and there is no need to redevelop for different products in the same series, which greatly shortens the product design cycle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the integrated modular hydraulic clamping device according to one embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the integrated modular hydraulic clamping device according to one embodiment of the present invention. Figure 2 ; Figure 3 This is a system schematic diagram of the accumulator operation of the integrated modular hydraulic clamping device according to one embodiment of the present invention. Figure 4 This is a schematic diagram of the system for applying pressurized oil to the actuator of the integrated modular hydraulic clamping device according to one embodiment of the present invention. Figure 5 This is a schematic diagram of the system principle of the integrated modular hydraulic clamping device for rapid unloading according to one embodiment of the present invention; Figure 6This is a schematic diagram of the slow unloading system of the integrated modular hydraulic clamping device according to one embodiment of the present invention.

[0016] Figure label: 1. Power unit; 11. Oil tank; 12. Motor; 13. Hydraulic pump; 2. Main valve block; 21. Safety valve; 3. Pressure sensor; 4. Accumulator; 5. Modular control valve assembly; 51. Quick unloading valve assembly; 52. Slow unloading valve assembly; 53. Buffer valve assembly; 6. Actuator; 6a. Oil inlet; 6b. Oil outlet; 7. Locking element; 8. Manual pump; 9. Pressure gauge. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0019] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] Figures 1-6The diagram schematically illustrates an integrated modular hydraulic clamping device according to one embodiment of the present invention, comprising a power unit 1, a main valve block 2, a pressure sensor 3, an accumulator 4, a modular control valve group 5, and an actuator 6, all connected via hydraulic pipelines to form a closed-loop control circuit. The power unit 1 provides pressurized oil to the system and includes an oil tank 11, a motor 12, and a hydraulic pump 13. The input end of the hydraulic pump 13 is connected to the oil tank 11, and the output end of the hydraulic pump 13 is connected to the input end of the main valve block 2. The motor 12 is connected to the hydraulic pump 13, providing power to drive the hydraulic pump 13 to convert the oil in the oil tank 11 into pressurized oil for output. The output end of the main valve block 2 has two oil circuits: one leading to the accumulator 4, and the other supplying the actuator 6. A safety valve 21 is installed inside the main valve block 2; if the system pressure is abnormally high, the oil will be depressurized through the safety valve 21. Pressure sensor 3 is installed on the main valve block 2 and located on the outlet oil line of accumulator 4 to monitor the pressure of accumulator 4 in real time. Accumulator 4 adopts a bladder-type structure, which can absorb excess oil when the system pressure is at its peak, thereby reducing the load on power unit 1. When power unit 1 stops or the pressure is insufficient due to pressure leakage of actuator 6, accumulator 4 can provide short-term pressure support. The module control valve group 5 includes a fast unloading valve group 51, a slow unloading valve group 52, and a buffer valve group 53. The fast unloading valve group 51 is set as a first solenoid valve. The input end of the first solenoid valve is connected to actuator 6 through an oil pipe, and the output end of the first solenoid valve is connected to oil tank 11. Through the rapid switching of the first solenoid valve, the actuator 6 and oil tank 11 are directly connected, which is suitable for rapid unloading under emergency shutdown or high flow conditions. The slow unloading valve group 52 is set as a second solenoid valve. The input end of the second solenoid valve is also connected to actuator 6, and the output end of the second solenoid valve is connected to oil tank 11 in series with buffer valve group 53 through a hydraulic pipeline. The nominal diameter of the first solenoid valve is larger than that of the second solenoid valve. The nominal diameter of the first solenoid valve is 11mm-13mm, preferably 12mm; the nominal diameter of the second solenoid valve is 7mm-9mm, preferably 8mm. The buffer valve assembly 53 is configured as a throttle valve, capable of regulating the speed of the pressurized oil flowing out of the slow unloading valve assembly 52. ​​It can set a minimum return oil pressure and control unidirectional slow return oil to prevent the actuator 6 from experiencing impact due to excessive unloading speed, ensuring a smooth unloading process. In this embodiment, the buffer valve assembly 53 is positioned between the fast unloading valve assembly 51 and the slow unloading valve assembly 52, with the slow unloading valve assembly 52 and the buffer valve assembly 53 arranged adjacently and tightly. Specifically, the main valve block 2, the fast unloading valve assembly 51, the slow unloading valve assembly 52, and the buffer valve assembly 53 are all provided with corresponding mounting holes, and locking members 7 are used to lock the connection through these mounting holes.Optionally, since the fast unloading valve assembly 51, slow unloading valve assembly 52, buffer valve assembly 53, and main valve block 2 have the same installation position, they can be combined according to actual needs. By modularly designing the modular control valve assembly 5 and the main valve block 2, they can be freely combined and installed, greatly improving the maintainability of the system. The actuator 6 is provided with an oil inlet 6a and an oil outlet 6b. The main valve block 2 is connected to the oil inlet 6a of the actuator 6, and the modular control valve assembly 5 is connected to the oil outlet 6b of the actuator 6. In this embodiment, the actuator 6 is a hydraulic cylinder or a hydraulic motor. A single-acting / double-acting cylinder or a fixed-displacement / variable-displacement motor is selected according to the working conditions. Its input pressure is directly supplied by the accumulator 4 or the power unit 1. When the pressure oil of the actuator 6 is insufficient due to leakage, the accumulator 4 will transfer the pressure oil to the actuator 6 through the pipeline, thereby reducing the number of times the motor 12 starts and extending the life of the motor 12.

[0022] The power unit 1 of this system also includes a manual pump 8. The input end of the manual pump 8 is connected to the oil tank 11, and the output end of the manual pump 8 is connected to the input end of the main valve block 2. When the motor 12 fails and stops, the manual pump 8 can be used to manually pressurize the system. The manual pump 8 is equipped with a pressure gauge 9. When the manual pump 8 is pressurizing the system, the operator needs to check the pressure gauge 9 to determine the pressure level.

[0023] like Figure 3 As shown, in energy storage mode, after power unit 1 starts, pressurized oil flows out from the output end of power unit 1, enters the main valve block 2 through the input end of the main valve block 2, and then enters the energy accumulator 4 through the oil passage provided by the main valve block 2 for storage. The energy accumulator 4 first stores a portion of the pressurized oil. Pressure sensor 3 continuously monitors the pressure of the energy accumulator 4. When the pressure reaches the set threshold, power unit 1 is shut off, the main valve block 2 automatically locks, and the energy accumulator 4 enters the pressure holding state. Figure 4 As shown, when actuator 6 needs to be activated, power unit 1 is started. Pressure oil flows from the output of power unit 1, enters main valve block 2 through the input of main valve block 2, and then enters the inlet 6a of actuator 6 through the oil passage provided by main valve block 2, driving actuator 6 to move. When power unit 1 stops or the pressure of actuator 6 is insufficient due to pressure oil leakage, accumulator 4 will transfer pressure oil to actuator 6 through pipelines to ensure stable operation of actuator 6. After actuator 6 completes its action, pressure sensor 3 feeds back data to the controller, and the system decides whether to enter energy storage mode or unloading mode based on the current state. Unloading mode has two methods: rapid unloading and slow unloading. Figure 5 As shown, when rapid unloading is required, pressurized oil flows out from the outlet 6b of the actuator 6, enters the input end of the rapid unloading valve group 51 (first solenoid valve) through the oil pipe, and then flows directly back to the oil tank 11 from the output end of the rapid unloading valve group 51 (first solenoid valve) for emergency shutdown or high flow conditions. Figure 6 As shown, when slow unloading is required, pressurized oil flows out from the outlet 6b of the actuator 6, enters the input end of the slow unloading valve group 52 (second solenoid valve) through the oil pipe, and then flows out from the output end of the slow unloading valve group 52 (second solenoid valve), enters the buffer valve group 53 through the oil pipe, and then flows back to the oil tank 11 after the return oil speed is regulated by the buffer valve group 53, preventing the actuator 6 from being impacted by rapid unloading. The buffer valve group 53 can be set with a minimum return oil pressure and control the one-way slow return oil to ensure a smooth unloading process.

[0024] During implementation, system assembly must be strictly performed according to the drawings to ensure leak-free pipeline connections. Initial commissioning includes no-load testing, accumulator 4 charging and unloading tests to verify system pressure stability and unloading effect. The load verification phase requires simulating actual operating conditions and adjusting the parameters of the buffer valve group 53 to ensure smooth operation of the actuator 6. For safety, the system is equipped with a pressure gauge 9 and an overpressure alarm device, and a manual emergency unloading valve is provided to prevent accidents.

[0025] The integrated modular hydraulic clamping device in the above embodiments has a reasonable structural design and is easy to use. This structure can also be used for other equipment with similar usage requirements. In the above embodiments, the integrated modular hydraulic clamping device can better adapt to the application needs of compact tooling or high-density production lines. It effectively reduces the energy consumption and manufacturing cost of the entire hydraulic clamping device. The modular control valve group has universality and interchangeability, and there is no need to redevelop for different products in the same series, which greatly shortens the product design cycle.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. An integrated modular hydraulic clamping device, characterized in that, include: The power unit is used to output a pressure oil source; An actuator, wherein the actuator is provided with an oil inlet and an oil outlet; A main valve block is disposed between the power unit and the actuator. The main valve block is used to distribute and regulate the flow direction of the pressure oil from the power unit, so that the pressure oil is directed to the oil inlet of the actuator. A modular control valve assembly is connected to the oil outlet of the actuator and is used to control the unloading action of the actuator under different operating conditions.

2. The integrated modular hydraulic clamping device according to claim 1, characterized in that, The module control valve group includes a quick unloading valve group, which is used to quickly unload the actuator. The quick unloading valve group is connected to the oil outlet of the actuator and the power unit. Under the condition of quick unloading, the pressure oil flows from the oil outlet of the actuator back to the oil circuit structure of the power unit through the quick unloading valve group.

3. The integrated modular hydraulic clamping device according to claim 2, characterized in that, The module control valve group includes a slow unloading valve group and a buffer valve group. The slow unloading valve group is used to slowly unload the actuator. The buffer valve group is used to regulate the return rate of the pressure oil after passing through the slow unloading valve group. The slow unloading valve group and the buffer valve group are connected in series. The buffer valve group is connected to the power unit. Under the slow unloading condition, a hydraulic circuit structure is formed in which the pressure oil flows from the oil outlet of the actuator through the slow unloading valve group and the buffer valve group back to the power unit.

4. The integrated modular hydraulic clamping device according to claim 3, characterized in that, The buffer valve group, the fast unloading valve group, and the slow unloading valve group are detachably connected. The buffer valve group is disposed between the fast unloading valve group and the slow unloading valve group, and the slow unloading valve group is disposed close to the buffer valve group.

5. The integrated modular hydraulic clamping device according to claim 3, characterized in that, The fast unloading valve assembly is configured as a first solenoid valve, and the slow unloading valve assembly is configured as a second solenoid valve. The nominal diameter of the first solenoid valve is larger than the nominal diameter of the second solenoid valve.

6. The integrated modular hydraulic clamping device according to claim 1, characterized in that, It includes an accumulator connected to the main valve block, which can provide short-term pressure support when the power unit stops or when the pressure is insufficient due to pressure leakage of the actuator.

7. The integrated modular hydraulic clamping device according to claim 6, characterized in that, A pressure sensor is installed on the main valve block. The pressure sensor is located on the outlet oil line of the accumulator and is used to monitor the pressure of the accumulator in real time.

8. The integrated modular hydraulic clamping device according to claim 1, characterized in that, The main valve block is equipped with a safety valve. When the system pressure rises abnormally to a value exceeding the set value, the safety valve opens, and the oil in the system is depressurized through the safety valve.

9. The integrated modular hydraulic clamping device according to claim 1, characterized in that, The power unit includes an oil tank, a motor, and a hydraulic pump. The input end of the hydraulic pump is connected to the oil tank and is used to output pressure oil to the system. The motor is connected to the hydraulic pump and drives the hydraulic pump to operate.

10. The integrated modular hydraulic clamping device according to claim 1, characterized in that, The power unit includes a manual pump, the input end of which is connected to the power unit, and the output end of which is connected to the input end of the main valve block. The manual pump is used to output pressure oil to the system.

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