Energy-saving hydraulic system based on servo motor driving

Abstract

The energy-saving hydraulic system based on servo motor driving comprises an oil tank, a motor and a plunger pump are arranged on the oil tank, the output end of the motor is connected with a no-load device, the no-load device comprises a coupling sleeve, a coupling rod, a coupling block and a coupling groove, the coupling block is clamped in the coupling groove, the coupling groove is formed in the outer side of the coupling rod, and the plunger pump is connected with the coupling sleeve. An adjusting device is arranged on the outer side of the coupling rod and comprises a linkage sleeve, an adjusting sleeve, a linkage groove and a linkage block, the linkage block is connected to the outer side of the linkage sleeve, the linkage groove is formed in the inner wall of the adjusting sleeve, a clamping mechanism is arranged on the outer side of the coupling sleeve, and the clamping mechanism comprises a reset rod, a return pin, a clamping sleeve, an arc-shaped groove, a round hole, a reset plate, a reset block, a reset spring and a connecting block. The reset rod is connected to one side of the clamping sleeve through the return stroke rod, the round hole is formed in one end of the arc-shaped groove, and the reset spring is connected with the reset block and the connecting block. According to the device, the test accuracy and reliability are improved, and the adaptability and safety of the device under various test conditions are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic devices, and more particularly to an energy-saving hydraulic system driven by a servo motor. Background Art

[0002] In the fields of industrial automation and precision testing, energy-saving hydraulic systems driven by servo motors play a vital role. Due to their high precision and excellent control capabilities, these devices are widely used in demanding scenarios such as pressure testing. However, despite the excellent performance of these devices, current technical designs still have some significant deficiencies. These problems not only affect the reliability and safety of the tests, but can also cause damage to the test equipment and the components being tested.

[0003] First, existing servo motor-driven hydraulic devices have potential safety hazards in controlling the direction of hydraulic oil. These systems usually rely on reversing valves to adjust the flow direction of hydraulic oil, thereby controlling the movement of the hydraulic piston. However, this design has a serious flaw: when the reversing valve fails, the system may not be able to respond in time and change the flow direction of the hydraulic oil. In a high-precision, high-pressure test environment, this delay or failure may lead to catastrophic consequences. For example, in a pressure test, if the pressure cannot be released or the pressure direction cannot be changed in time, the test element may be subjected to pressure beyond its design limit, causing irreversible damage. This will not only affect the accuracy of the test results, but may also bring huge economic losses, especially when testing high-value or critical performance components.

[0004] Secondly, the existing technology has obvious deficiencies in the flexibility of the protection mechanism. Different test elements have different pressure-bearing capabilities and characteristics due to differences in materials, structures and uses. Ideally, the test equipment should be able to flexibly adjust its protection trigger mechanism according to the characteristics of the tested element. For example, for some brittle materials, it may be necessary to trigger the protection mechanism when encountering less resistance, while for some tougher materials, it may be allowed to withstand greater pressure. However, most devices currently on the market perform poorly in this regard. They often use fixed trigger thresholds and lack the ability to adjust according to different test requirements. This not only limits the application scope of the equipment, but may also lead to safety hazards during the testing process. In some cases, an inappropriate trigger threshold may cause the protection mechanism to start too late and fail to effectively protect the test element; or it may be triggered too early, affecting the effectiveness and accuracy of the test.

[0005] In addition, although some advanced equipment has begun to try to introduce adjustable trigger mechanisms, these designs still have obvious shortcomings. These devices usually use relatively simple mechanical structures to adjust the trigger threshold. However, this simple mechanical structure is often difficult to maintain stability in high-speed, high-pressure working environments. When the servo motor runs at high speed, the entire system will produce violent vibrations and shocks, which may cause these adjustment mechanisms to gradually loosen or shift. As a result, the carefully adjusted trigger threshold may quietly change during the test, and the operator may not notice it for a long time. This hidden change not only affects the accuracy and repeatability of the test results, but may also cause the protection mechanism to completely fail in extreme cases, thereby posing a serious safety hazard. Summary of the Invention

[0006] In response to the problems existing in the prior art, the present invention provides an energy-saving hydraulic system driven by a servo motor to solve the technical problems mentioned in the background technology. Technical Solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an energy-saving hydraulic system driven by a servo motor, comprising an oil tank, a motor and a plunger pump being detachably provided on the oil tank, an output end of the motor being connected to an idle device, the idle device comprising a coupling sleeve, a coupling rod, a coupling block and a coupling groove, the coupling sleeve being connected to the output end of the motor, the coupling rod being connected to the plunger pump, the coupling block being engaged in the coupling groove, a plurality of the coupling grooves being opened on the outside of the coupling rod, an adjustment device being provided on the outside of the coupling rod, the adjustment device comprising a linkage sleeve, an adjustment sleeve, a linkage groove and a linkage block, a plurality of the linkage blocks being fixedly connected to the outside of the linkage sleeve, and the adjustment sleeve being rotatably connected to the coupling sleeve On one side, the linkage groove is spirally opened on the inner wall of the adjustment sleeve, and the linkage block slides in the linkage groove, and a fixing mechanism is provided on the outside of the coupling sleeve, and the fixing mechanism includes a reset rod, a return rod, a fixing sleeve, an arc groove, a circular hole, a reset plate, a reset block, a reset spring and a connecting block, the reset rod is fixedly connected to one side of the fixing sleeve through the return rod, the fixing sleeve is arranged on the outside of the coupling sleeve, the arc groove is opened on the reset plate, the circular hole is opened at one end of the arc groove, the reset plate is rotatably sleeved on the outside of the coupling sleeve, the reset block is fixedly connected to one side of the reset plate, the two ends of the reset spring are respectively connected to the reset block and the connecting block, and the connecting block is fixedly connected to the outside of the coupling sleeve.

[0008] The present invention is further configured such that a plurality of clamping rods are slidingly provided on the side wall of the adjustment sleeve, a conical spring is provided on the outside of the adjustment sleeve, one end of the clamping rod is connected to the outer wall of the adjustment sleeve through the conical spring, a plurality of clamping grooves are provided on the outside of the coupling sleeve, the other end of the clamping rod is inserted into the clamping groove, a return spring is connected to one side of the clamping sleeve, and the other end of the return spring is in contact connection with the reset plate.

[0009] The present invention is further configured such that a guide rail is fixedly provided on the outer side of the coupling sleeve, a guide groove is provided on the inner side of the clamping sleeve, and the guide groove is adapted to the guide rail.

[0010] The present invention is further configured such that a plurality of adjustment blocks are movably provided in the coupling sleeve, an adjustment plate is fixedly connected to one side of the adjustment block, a plurality of adjustment grooves are opened on the inner wall of the coupling sleeve, the adjustment plate slides in the adjustment groove, and both the adjustment plate and the adjustment groove are designed as inclined structures.

[0011] The present invention is further configured such that an adaptor groove is provided on one side of the linkage sleeve, an adaptor block is connected to one side of the adjustment block, and the adaptor block is slidably arranged in the adaptor groove. The setting of the adaptor groove and the adaptor block ensures that the adjustment block moves with the linkage sleeve to determine the position of the adjustment block.

[0012] The present invention is further configured as follows: the oil tank is detachably provided with a filter and a valve body, the plunger pump is connected to a fuel pipe, the plunger pump input end is connected to the filter output end through the fuel pipe, the filter input end is inserted into the bottom end of the oil tank, the plunger pump output end is connected to the valve body through the fuel pipe, one side of the valve body is connected to an external hydraulic device, the filter is provided to filter the hydraulic oil to prevent equipment clogging, the valve body is provided with a control valve and a reversing valve to ensure basic operation of the equipment, and the fuel pipe is provided to ensure stable delivery of the hydraulic oil.

[0013] The present invention is further configured such that an oil return pipe is provided on the oil tank, and the other end of the oil return pipe is connected to the valve body. The provision of the oil return pipe realizes the recycling of the hydraulic oil.

[0014] The present invention is further configured such that a receiving groove is provided on the inner side of the adjustment block, a push spring is movably provided in the receiving groove, and the coupling block is connected to the inner wall of the receiving groove through the push spring. The above components ensure stable triggering and resetting of the linkage block. Beneficial effects

[0015] Compared with the prior art, the present invention provides an energy-saving hydraulic system driven by a servo motor, which has the following beneficial effects: 1. The no-load device cleverly solves the problem of test element damage caused by reversing valve failure in the existing technology. Through the precise coordination of the coupling sleeve, coupling rod, coupling block and coupling groove, an automatic disengagement mechanism is realized when the hydraulic pressure reaches the preset threshold. This design not only cuts off power transmission in time when the reversing valve fails, but also effectively protects the motor from overload damage. The rounded corners between the coupling block and the coupling groove ensure the smoothness of the disengagement process, while the push spring in the storage groove provides the necessary buffering effect. This innovative mechanism greatly improves the safety of the test process, effectively prevents test element damage caused by control system failure, and also extends the service life of the equipment.

[0016] 2. The design of the adjustment device cleverly solves the problem of difficult flexible adjustment of the trigger mechanism in the existing technology. Through the precise coordination of components such as the linkage sleeve, adjustment sleeve, linkage groove and linkage block, precise adjustment of the trigger force is achieved. The spiral linkage groove design, combined with the inclined structure of the adjustment block, adjustment plate and adjustment groove, allows the operator to flexibly adjust the trigger force according to the characteristics of different test elements. The combined design of the adapter block and adapter groove ensures a smooth and precise adjustment process. This design greatly improves the adaptability of the device under various test conditions, solves the limitations brought about by the fixed trigger threshold, and enables the test work to be precisely adjusted for test elements of different materials and structures, thereby improving the accuracy and reliability of the test.

[0017] 3. The design of the locking mechanism effectively solves the problem of insufficient stability of the adjustment mechanism in the existing technology. Through the ingenious cooperation of the reset rod, return rod, locking sleeve, arc groove, round hole and other components, multiple locking of the trigger mechanism after adjustment is achieved. The design of the reset spring and return spring not only provides the necessary preload force, but also ensures the smoothness of the locking process. The cooperation of the guide rail and guide groove further enhances the stability of the overall structure. This multiple locking mechanism greatly improves the seismic resistance and stability of the device, and effectively prevents changes in the trigger mechanism caused by high-speed operation. At the same time, the design of the locking rod and the locking groove, combined with the effect of the conical spring, further enhances the locking effect of the adjustment device. This innovation not only greatly improves the reliability and accuracy of the test data, but also enhances the stability of the test equipment in high-speed and high-pressure working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the energy-saving hydraulic system driven by a servo motor in the present invention; Figure 2 It is a structural diagram of the motor and plunger pump parts of the present invention; Figure 3 Schematic diagram of the structure of the coupling sleeve and coupling rod in the present invention; Figure 4Schematic diagram of the cross-sectional structure of the coupling sleeve and coupling rod in the present invention; Figure 5 Schematic diagram of the cross-sectional structure of the coupling sleeve and the coupling rod at a second angle in the present invention; Figure 6 It is a structural schematic diagram of the linkage sleeve, coupling rod and adjustment block in the present invention.

[0019] In the figure: 1. oil tank; 2. motor; 3. plunger pump; 4. coupling sleeve; 5. coupling rod; 6. coupling block; 7. coupling groove; 8. linkage sleeve; 9. adjusting sleeve; 10. linkage groove; 11. linkage block; 12. reset rod; 13. return rod; 14. fixing sleeve; 15. arc groove; 16. round hole; 17. reset plate; 18. reset block; 19. reset spring; 20. connecting block; 21. fixing rod; 22. conical spring; 23. fixing groove; 24. return spring; 25. guide rail; 26. guide groove; 27. adjusting block; 28. adjusting plate; 29. ​​adjusting groove; 30. adapter groove; 31. adapter block; 32. filter; 33. valve body; 34. oil delivery pipe; 35. oil return pipe; 36. receiving groove; 37. push spring. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0022] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0023] See also Figures 1-6, an energy-saving hydraulic system driven by a servo motor, including an oil tank 1, on which a motor 2 and a plunger pump 3 are detachably provided, and an idle device is connected to the output end of the motor 2, the idle device including a coupling sleeve 4, a coupling rod 5, a coupling block 6 and a coupling groove 7, the coupling sleeve 4 is connected to the output end of the motor 2, the coupling rod 5 is connected to the plunger pump 3, the coupling block 6 is engaged in the coupling groove 7, a plurality of coupling grooves 7 are opened on the outside of the coupling rod 5, an adjustment device is provided on the outside of the coupling rod 5, the adjustment device including a linkage sleeve 8, an adjustment sleeve 9, a linkage groove 10 and a linkage block 11, a plurality of linkage blocks 11 are fixedly connected to the outside of the linkage sleeve 8, the adjustment sleeve 9 is rotatably connected to one side of the coupling sleeve 4, the linkage groove 10 is spirally opened on the inner wall of the adjustment sleeve 9, and the linkage The movable block 11 slides in the linkage groove 10, and a fixing mechanism is provided on the outside of the coupling sleeve 4. The fixing mechanism includes a reset rod 12, a return rod 13, a fixing sleeve 14, an arc groove 15, a circular hole 16, a reset plate 17, a reset block 18, a reset spring 19 and a connecting block 20. The reset rod 12 is fixedly connected to one side of the fixing sleeve 14 through the return rod 13. The fixing sleeve 14 is sleeved on the outside of the coupling sleeve 4. The arc groove 15 is opened on the reset plate 17. The circular hole 16 is opened at one end of the arc groove 15. The reset plate 17 is rotatably sleeved on the outside of the coupling sleeve 4. The reset block 18 is fixedly connected to one side of the reset plate 17. The two ends of the reset spring 19 are respectively connected to the reset block 18 and the connecting block 20. The connecting block 20 is fixedly connected to the outside of the coupling sleeve 4.

[0024] A plurality of clamping rods 21 are slidingly provided on the side wall of the adjusting sleeve 9, a conical spring 22 is provided on the outside of the adjusting sleeve 9, one end of the clamping rod 21 is connected to the outer wall of the adjusting sleeve 9 through the conical spring 22, a plurality of clamping grooves 23 are provided on the outside of the coupling sleeve 4, the other end of the clamping rod 21 is inserted into the clamping groove 23, a return spring 24 is connected to one side of the clamping sleeve 14, and the other end of the return spring 24 is in contact connection with the reset plate 17.

[0025] A guide rail 25 is fixedly provided on the outer side of the coupling sleeve 4 , and a guide groove 26 is provided on the inner side of the clamping sleeve 14 , and the guide groove 26 is adapted to the guide rail 25 .

[0026] A plurality of adjustment blocks 27 are movably provided in the coupling sleeve 4, and an adjustment plate 28 is fixedly connected to one side of the adjustment block 27. A plurality of adjustment slots 29 are opened on the inner wall of the coupling sleeve 4, and the adjustment plate 28 slides in the adjustment slot 29, and both the adjustment plate 28 and the adjustment slot 29 are of inclined structural design.

[0027] An adapting groove 30 is formed on one side of the linkage sleeve 8 , and an adapting block 31 is connected to one side of the adjustment block 27 . The adapting block 31 is slidably disposed in the adapting groove 30 .

[0028] In this embodiment, when it is necessary to adjust the trigger mechanism preset by the no-load device, first rotate the reset block 18, and the reset block 18 will cooperate with the connecting block 20 to squeeze the reset spring 19. At the same time, the reset block 18 will drive the circular hole 16 and the arc groove 15 to rotate through the reset plate 17. When the reset spring 19 is squeezed to the limit, the circular hole 16 just moves to a position concentric with the reset rod 12 and the return rod 13, and then push the fixing sleeve 14. The fixing sleeve 14 will drive the return rod 13 and the reset rod 12 to slide along the guide rail 25 and the guide groove 26. At the same time, the reset rod 12 will gradually penetrate into the circular hole 16, and the fixing sleeve 14 will cooperate with the reset plate 17 to squeeze the return spring 24. When the return spring 24 is squeezed to the limit, the reset rod 12 completely passes through the reset plate 17 and The return rod 13 then enters the arc groove 15, and the return rod 13 and the return rod 12 cooperate to limit the fixing sleeve 14 to one side of the reset plate 17, and cooperate with the guide rail 25 and the guide groove 26 to prevent the fixing sleeve 14 from moving. At this time, the fixing sleeve 14 no longer limits the fixing rod 21, and then the adjusting sleeve 9 is rotated. The adjusting sleeve 9 will drive the multiple fixing rods 21 slidingly arranged on the side wall to move, and then the inner wall of the fixing groove 23 squeezes one end of the fixing rod 21. Due to the circular edge of the fixing groove 23 and the end of the fixing rod 21 Angle structure design, then one end of the fixing rod 21 slides out of the fixing groove 23, and the other end of the fixing rod 21 drives the conical spring 22 to stretch, and at the same time the adjusting sleeve 9 drives the linkage groove 10 opened on the inner wall to rotate. Due to the spiral structure design of the linkage groove 10 and the cooperation of the adapter block 31 and the adapter groove 30, the linkage sleeve 8 cannot rotate, and then the linkage block 11 set on the outside of the linkage sleeve 8 slides in the linkage groove 10, and then the linkage block 11 drives the linkage sleeve 8 to slide, and then the linkage sleeve 8 will drive the adjustment block 27 to move through the cooperation of the adapter block 31 and the adapter groove 30, and then the adjustment block 27 will drive the adjustment plate 28 set on one side to slide along the adjustment groove 29. Due to the inclined structure design of the adjustment groove 29 and the adjustment plate 28, the adjustment When the plate 28 slides along the adjustment slot 29, it drives the adjustment block 27 to spread outward, and each adjustment block 27 will respectively drive the adapter block 31 connected on one side to slide along the adapter slot 30. At the same time, the adjustment block 27 will drive the receiving slot 36 opened on the inner side to move outward, so that the push spring 37 is released, thereby reducing the preload force applied to the coupling shaft block 6, achieving the purpose of reducing the trigger force, thereby making the triggering of the device easier. When it is necessary to increase the preload force applied to the coupling shaft to achieve the purpose of increasing the trigger force, the adjustment sleeve 9 can be rotated in the opposite direction. When the appropriate trigger force is adjusted, the adjustment sleeve 9 is stopped, and the conical spring 22 drives the clamping rod 21 to slide back and insert it into the corresponding clamping slot 23, and then the reset block 18 is rotated again.The reset block 18 cooperates with the connecting block 20 to squeeze the reset spring 19 again, and the reset plate 17 drives the circular hole 16 and the arc groove 15 to rotate again. When the circular hole 16 moves to a position concentric with the return rod 13 and the reset rod 12 again, the return spring 24 pushes the clamping sleeve 14 to slide and reset along the guide rail 25 and the guide groove 26. At the same time, the clamping sleeve 14 drives the reset rod 12 to slide and reset through the return rod 13. When the return spring 24 is completely reset, one end of the reset rod 12 moves back to the side of the reset plate 17, and then the reset block 18 is released. The reset spring 19 pushes the reset block 18 to rotate and reset, and The reset plate 17 will drive the circular hole 16 and the arcuate slot 15 to reset and rotate to a position that does not correspond to the return rod 13 and the reset rod 12. At this time, the reset rod 12 and the return rod 13 cooperate to stably support the clamping sleeve 14 to the side of the reset plate 17. The upper guide rail 25 and the guide slot 26 limit the clamping sleeve 14 so that it cannot move. Then the inner wall of the clamping sleeve 14 limits the outer end of the clamping rod 21, so that the clamping rod 21 cannot move. Then the clamping rod 21 and the clamping slot 23 cooperate to fix the adjustment sleeve 9, so that the adjustment sleeve 9 cannot move, ensuring the stability of the structure and thus ensuring the stable use of the device.

[0029] See also Figures 1-6 As a further implementation of the entire equipment: the oil tank 1 is detachably provided with a filter 32 and a valve body 33, the plunger pump 3 is connected with an oil pipe 34, the input end of the plunger pump 3 is connected to the output end of the filter 32 through the oil pipe 34, the input end of the filter 32 is inserted into the bottom end of the oil tank 1, the output end of the plunger pump 3 is connected to the valve body 33 through the oil pipe 34, and one side of the valve body 33 is connected to an external hydraulic device.

[0030] An oil return pipe 35 is provided on the oil tank 1 , and the other end of the oil return pipe 35 is connected to the valve body 33 .

[0031] A receiving groove 36 is formed on the inner side of the adjustment block 27 , and a push spring 37 is movably provided in the receiving groove 36 . The coupling block 6 is connected to the inner wall of the receiving groove 36 via the push spring 37 .

[0032] More specifically, when the device needs to be used, first turn on the motor 2, and the motor 2 drives the coupling sleeve 4 connected to the output end to rotate, and then drives the coupling block 6 set in the receiving groove 36 to rotate through the cooperation of the adjustment groove 29, the adjustment plate 28 and the adjustment block 27, and then drives the coupling rod 5 to rotate through the cooperation of the coupling block 6 and the coupling groove 7, so that the coupling rod 5 drives the plunger pump 3 to operate, and then the plunger pump 3 will draw the oil stored in the oil tank 1 into the filter 32 through the oil delivery pipe 34 connected to the input end, and after filtering through the filter 32, the oil is drawn into the plunger pump 3, and then distributed and delivered to the valve body 33 through the oil delivery pipe 34 connected to the output end of the plunger pump 3, and the oil is delivered to the external hydraulic equipment for hydraulic work through the cooperation of the control valve and the reversing valve in the valve body 33. After the hydraulic test is completed, the output oil is re-drawn into the valve body 33 by controlling the reversing valve. , and then it is transported back to the oil tank 1 through the return oil pipe 35 provided on the other side of the valve body 33. When the reversing valve in the valve body 33 fails and cannot be used, and the output pressure of the hydraulic device reaches the preset trigger mechanism, the hydraulic oil can no longer be delivered, the plunger pump 3 cannot rotate inside, making the coupling rod 5 unable to rotate, and then the inner wall of the coupling groove 7 squeezes the side wall of the coupling block 6. Due to the rounded corner design on both sides of the inner side of the coupling groove 7 and the rounded corner treatment on both sides of the coupling block 6, the coupling block 6 will slide out of the coupling groove 7 and gradually be retracted into the receiving groove 36 opened on the inner side of the adjustment block 27, and the coupling block 6 will squeeze the push spring 37 provided in the receiving groove 36, so that the motor 2 drives the coupling sleeve 4 to idle, realize no-load, ensure the tested component while preventing the motor 2 from being overloaded and damaged, and then turn off the motor 2 to repair or replace the reversing valve in the valve body 33.

[0033] In summary, when the entire device is in use or running: when it is necessary to adjust the preset trigger mechanism of the no-load device, first rotate the reset block 18, and the reset block 18 will cooperate with the connecting block 20 to squeeze the reset spring 19. At the same time, the reset block 18 will drive the circular hole 16 and the arc groove 15 to rotate through the reset plate 17. When the reset spring 19 is squeezed to the limit, the circular hole 16 just moves to a position concentric with the reset rod 12 and the return rod 13, and then push the fixing sleeve 14. The fixing sleeve 14 will drive the return rod 13 and the reset rod 12 to slide along the guide rail 25 and the guide groove 26. At the same time, the reset rod 12 will gradually penetrate into the circular hole 16, and the fixing sleeve 14 will cooperate with the reset plate 17 to squeeze the return spring 24. When the return spring 24 is squeezed to the limit, the reset rod 12 is completely penetrated. The reset plate 17 passes and moves to the other side of the reset plate 17, and then the reset block 18 is released. The reset spring 19 pushes the reset block 18 to rotate in the opposite direction, and then the reset block 18 will drive the arc groove 15 and the round hole 16 to rotate in the opposite direction through the reset plate 17, and then the return rod 13 will enter the arc groove 15, and then the return rod 13 and the reset rod 12 will cooperate to limit the fixing sleeve 14 to one side of the reset plate 17, and cooperate with the guide rail 25 and the guide groove 26 to make the fixing sleeve 14 unable to move. At this time, the fixing sleeve 14 no longer limits the fixing rod 21, and then the adjusting sleeve 9 is rotated. The adjusting sleeve 9 will drive the multiple fixing rods 21 slidingly arranged on the side wall to move, and then the inner wall of the fixing groove 23 squeezes one end of the fixing rod 21. Due to the edge of the fixing groove 23 and the fixing rod 2 1 end of the rounded structure design, then one end of the fixing rod 21 slides out of the fixing groove 23, and the other end of the fixing rod 21 drives the conical spring 22 to stretch, and at the same time the adjusting sleeve 9 drives the linkage groove 10 opened on the inner wall to rotate. Due to the spiral structure design of the linkage groove 10 and the cooperation of the adapter block 31 and the adapter groove 30, the linkage sleeve 8 cannot rotate, and then the linkage block 11 set on the outside of the linkage sleeve 8 slides in the linkage groove 10, and then the linkage block 11 drives the linkage sleeve 8 to slide, and then the linkage sleeve 8 drives the adjustment block 27 to move through the cooperation of the adapter block 31 and the adapter groove 30, and then the adjustment block 27 drives the adjustment plate 28 set on one side to slide along the adjustment groove 29. Due to the inclined structure design of the adjustment groove 29 and the adjustment plate 28, then When the rear adjustment plate 28 slides along the adjustment slot 29, it drives the adjustment block 27 to spread outward, and each adjustment block 27 will respectively drive the adapter block 31 connected on one side to slide along the adapter slot 30. At the same time, the adjustment block 27 will drive the receiving slot 36 opened on the inner side to move outward, so that the push spring 37 is released, thereby reducing the preload force applied to the coupling shaft block 6, achieving the purpose of reducing the trigger force, thereby making the triggering of the device easier. When it is necessary to increase the preload force applied to the coupling shaft to achieve the purpose of increasing the trigger force, the adjustment sleeve 9 can be rotated in the opposite direction. When the appropriate trigger force is adjusted, the adjustment sleeve 9 is stopped, and the conical spring 22 drives the clamping rod 21 to slide back and insert it into the corresponding clamping slot 23, and then the reset block 18 is rotated again.The reset block 18 cooperates with the connecting block 20 to squeeze the reset spring 19 again, and the reset plate 17 drives the circular hole 16 and the arc groove 15 to rotate again. When the circular hole 16 moves to a position concentric with the return rod 13 and the reset rod 12 again, the return spring 24 pushes the clamping sleeve 14 to slide and reset along the guide rail 25 and the guide groove 26. At the same time, the clamping sleeve 14 drives the reset rod 12 to slide and reset through the return rod 13. When the return spring 24 is completely reset, one end of the reset rod 12 moves back to the side of the reset plate 17, and then the reset block 18 is released. The reset spring 19 pushes the reset block 18 to rotate and reset, and The reset plate 17 will drive the circular hole 16 and the arcuate slot 15 to reset and rotate to a position that does not correspond to the return rod 13 and the reset rod 12. At this time, the reset rod 12 and the return rod 13 cooperate to stably support the clamping sleeve 14 to the side of the reset plate 17. The upper guide rail 25 and the guide slot 26 limit the clamping sleeve 14 so that it cannot move. Then the inner wall of the clamping sleeve 14 limits the outer end of the clamping rod 21, so that the clamping rod 21 cannot move. Then the clamping rod 21 and the clamping slot 23 cooperate to fix the adjustment sleeve 9, so that the adjustment sleeve 9 cannot move, ensuring the stability of the structure and thus ensuring the stable use of the device.

[0034] When the device needs to be used, first turn on the motor 2, and the motor 2 drives the coupling sleeve 4 connected to the output end to rotate, and then drives the coupling block 6 set in the receiving groove 36 to rotate through the cooperation of the adjustment groove 29, the adjustment plate 28 and the adjustment block 27, and then drives the coupling rod 5 to rotate through the cooperation of the coupling block 6 and the coupling groove 7, so that the coupling rod 5 drives the plunger pump 3 to operate, and then the plunger pump 3 will draw the oil stored in the oil tank 1 into the filter 32 through the oil delivery pipe 34 connected to the input end, and the oil will be drawn into the plunger pump 3 after being filtered by the filter 32, and then distributed to the valve body 33 through the oil delivery pipe 34 connected to the output end of the plunger pump 3, and then the oil will be delivered to the external hydraulic equipment for hydraulic work through the cooperation of the control valve and the reversing valve in the valve body 33. After the hydraulic test is completed, the output oil is re-drawn back into the valve body 33 by controlling the reversing valve, and then When the oil pressure in the oil pump 35 is too low, the oil in the oil pump 35 will not stop flowing, and the oil in the oil pump 35 will not stop flowing.

[0035] In all the schemes mentioned above, the connection between the two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be described here one by one. In the above, all fixed connections are preferably considered to be welding. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving hydraulic system based on a servo motor drive, comprising an oil tank (1), characterized in that: The oil tank (1) is provided with a motor (2) and a plunger pump (3). The output end of the motor (2) is connected to an idle device, the idle device comprising a coupling sleeve (4), a coupling rod (5), a coupling block (6) and a coupling groove (7). The coupling block (6) is engaged in the coupling groove (7). The coupling groove (7) is provided on the outside of the coupling rod (5). An adjustment device is provided on the outside of the coupling rod (5). The adjustment device comprises a linkage sleeve (8), an adjustment sleeve (9), a linkage groove (10) and a linkage block (11). The linkage block (11) is connected to the outside of the linkage sleeve (8). The linkage groove (10) is provided on the inner wall of the adjustment sleeve (9) in a spiral shape. A fixing member is provided on the outside of the coupling sleeve (4). The fixing mechanism comprises a reset rod (12), a return rod (13), a fixing sleeve (14), an arcuate groove (15), a circular hole (16), a reset plate (17), a reset block (18), a reset spring (19) and a connecting block (20), wherein the reset rod (12) is connected to one side of the fixing sleeve (14) through the return rod (13), the arcuate groove (15) is provided on the reset plate (17), the circular hole (16) is provided at one end of the arcuate groove (15), the reset block (18) is connected to one side of the reset plate (17), the two ends of the reset spring (19) are respectively connected to the reset block (18) and the connecting block (20), and the connecting block (20) is connected to the outside of the coupling sleeve (4).

2. The energy-saving hydraulic system based on servo motor drive according to claim 1 is characterized in that: A plurality of clamping rods (21) are slidably provided on the side wall of the adjustment sleeve (9), a conical spring (22) is provided on the outer side of the adjustment sleeve (9), one end of the clamping rod (21) is connected to the outer wall of the adjustment sleeve (9) through the conical spring (22), a plurality of clamping grooves (23) are provided on the outer side of the coupling sleeve (4), the other end of the clamping rod (21) is inserted into the clamping groove (23), a return spring (24) is connected to one side of the clamping sleeve (14), and the other end of the return spring (24) is in contact connection with the reset plate (17).

3. The energy-saving hydraulic system based on servo motor drive according to claim 2 is characterized in that: A guide rail (25) is fixedly provided on the outer side of the coupling sleeve (4), and a guide groove (26) is provided on the inner side of the clamping sleeve (14), wherein the guide groove (26) is adapted to the guide rail (25).

4. The energy-saving hydraulic system based on servo motor drive according to claim 1 is characterized in that: A plurality of adjustment blocks (27) are movably provided in the coupling sleeve (4), an adjustment plate (28) is fixedly connected to one side of the adjustment block (27), a plurality of adjustment slots (29) are provided on the inner wall of the coupling sleeve (4), the adjustment plates (28) are slidably located in the adjustment slots (29), and both the adjustment plates (28) and the adjustment slots (29) are designed as inclined structures.

5. The energy-saving hydraulic system based on servo motor drive according to claim 4 is characterized in that: An adapting groove (30) is provided on one side of the linkage sleeve (8), and an adapting block (31) is connected to one side of the adjustment block (27). The adapting block (31) is slidably arranged in the adapting groove (30).

6. The energy-saving hydraulic system based on servo motor drive according to any one of claims 4 or 5, characterized in that: The oil tank (1) is detachably provided with a filter (32) and a valve body (33), and the plunger pump (3) is connected to an oil delivery pipe (34). The input end of the plunger pump (3) is connected to the output end of the filter (32) via the oil delivery pipe (34). The input end of the filter (32) is inserted into the bottom end of the oil tank (1). The output end of the plunger pump (3) is connected to the valve body (33) via the oil delivery pipe (34). One side of the valve body (33) is connected to an external hydraulic device.

7. The energy-saving hydraulic system based on servo motor drive according to claim 6 is characterized by: The oil tank (1) is provided with an oil return pipe (35), and the other end of the oil return pipe (35) is connected to the valve body (33).

8. The energy-saving hydraulic system based on servo motor drive according to claim 7 is characterized in that: A receiving groove (36) is provided on the inner side of the adjustment block (27), a push spring (37) is movably provided in the receiving groove (36), and the coupling block (6) is connected to the inner wall of the receiving groove (36) via the push spring (37).

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