Proportional valve and switch valve hybrid control hydraulic system

Abstract

The invention discloses a proportional valve and switch valve hybrid control hydraulic system, and relates to the technical field of hydraulic systems, the proportional valve and switch valve hybrid control hydraulic system comprises a valve body, a driving unit drives a screw-in unit to rotate and push in a first groove drum or a second groove drum, and an adjusting unit drives a movable unit to move on a fixed unit; the first groove drum and the second groove drum are in two surrounding states, so that when the screw-in unit is matched with the first groove drum, the valve element is quickly pushed, the use effect of the switch valve is achieved, when the screw-in unit is matched with the second groove drum, the valve element is slowly and precisely pushed, and the use effect of the proportional valve is achieved. Complex logic judgment and tedious signal allocation processes in a control link are greatly reduced, so that the control logic of the whole hydraulic system is remarkably simplified, the requirements on hardware resources and software algorithm complexity of the control system are reduced, and the reliability and real-time performance of control are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic systems, and more particularly to a proportional valve and a switch valve hybrid control hydraulic system. Background Art

[0002] In the field of modern engineering technology and industrial manufacturing, hydraulic systems, as key means of power transmission and control, are widely used in various types of mechanical equipment, such as machine tools, engineering machinery, aerospace equipment, etc. Its working performance directly affects the operating accuracy, efficiency and reliability of the entire equipment.

[0003] In the traditional hydraulic system design architecture, when it comes to the application of proportional valves and switch valves, the two are generally arranged separately. This layout is mainly based on the traditional functional modular design concept, aiming to realize the precise proportional control function of proportional valves on hydraulic flow, pressure and other parameters, and the simple switching function of switch valves on the hydraulic oil circuit.

[0004] However, with the continuous development of industrial technology, the control requirements of equipment for hydraulic systems are becoming increasingly complex and diverse. In actual application scenarios, this traditional mode of separately arranging multiple groups of valve bodies has exposed a series of significant problems.

[0005] First, from the perspective of control complexity, since proportional valves and switch valves are set separately and in large numbers, multiple groups of valve bodies need to be independently controlled and monitored. This requires the control system to have powerful processing capabilities and complex control logic to coordinate the collaborative work of different valve bodies under different working conditions. For example, in a device that needs to frequently switch the working mode of the hydraulic actuator, it is necessary to accurately control the proportional valve to achieve gradual flow adjustment to meet the speed control requirements of the actuator, and accurately operate the switch valve to change the connection path of the oil circuit. The interactive control and timing coordination between multiple groups of valve bodies become extremely complicated, and the slightest carelessness may lead to system failure or abnormal operation.

[0006] Secondly, the separately arranged valve bodies also have obvious disadvantages in terms of space occupation. Especially in some applications that require compact internal space layout of the equipment, such as the hydraulic station of precision machine tools or the hydraulic module of aerospace equipment, the layout of multiple sets of valve bodies and their connecting pipes will occupy a lot of valuable space, increase the overall volume and weight of the equipment, which is not conducive to the miniaturization and lightweight design of the equipment, and also increases the difficulty of system installation, maintenance and overhaul.

[0007] Furthermore, from the perspective of system cost, the design of multiple independent valve bodies means more parts procurement costs, higher manufacturing costs and subsequent maintenance costs. Each valve body needs to be equipped with a corresponding drive device, sensor and connection interface. These additional hardware resources not only increase the initial investment, but also increase the probability of failure in the long-term operation due to the large number of components, further increasing the operation and maintenance costs and downtime risks of the equipment.

[0008] In summary, in view of the many problems such as high control difficulty, non-compact spatial layout, and high cost caused by the separate arrangement and the need to control multiple groups of valve bodies when the proportional valve and the switch valve are used in the existing hydraulic system, an innovative hydraulic system design scheme is urgently needed, that is, to develop a valve body that can flexibly adjust the control switch or proportion, integrate the functions of the proportional valve and the switch valve, so as to effectively simplify the control logic, optimize the spatial layout and reduce the cost, so as to better meet the comprehensive requirements of modern industrial equipment for high performance, high reliability, miniaturization and low cost of hydraulic systems, and promote the further innovation and development of hydraulic technology in various fields. In view of this, we propose a proportional valve and switch valve hybrid control hydraulic system. Summary of the invention

[0009] The object of the present invention is to provide a proportional valve and a switch valve hybrid control hydraulic system to solve the above technical problems.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a proportional valve and switch valve mixed control hydraulic system, comprising a valve body, a valve cavity is provided inside the valve body, a first port is provided at one end of the valve body, a second port is provided at the other end of the valve body, a third port is provided at the top of the valve body, a valve cover is connected to the third port by bolts, a bearing unit is provided on the valve cover, an actuator is provided on the bearing unit, a valve core is connected to one end of the actuator away from the bearing unit, and the valve core is movably inserted in the third port; The actuator includes a driving unit, a screw-in unit, a fixed unit, a movable unit, a rotating unit, a first grooved cylinder, a second grooved cylinder and an adjusting unit. The driving unit is arranged at the top of the carrying unit, one end of the screw-in unit is connected to the output end of the driving unit, and the other end of the screw-in unit is connected to the valve core. The fixed unit is arranged on the valve cover, the movable unit is movably arranged on the fixed unit, and the rotating unit is rotatably connected to the bottom end of the fixed unit. The first grooved cylinder and the second grooved cylinder are both arranged on the movable unit, and the adjusting unit is arranged on the valve cover and meshingly connected to the bottom end of the rotating unit.

[0011] Preferably, the driving unit comprises a support frame and a brushed DC motor, the support frame is connected to the carrying unit, the brushed DC motor is arranged on the support frame, and an output end of the brushed DC motor is connected to the precession unit.

[0012] Preferably, the precession unit comprises an output shaft and a rotating ball, one end of the output shaft is connected to the output end of the brushed DC motor, the other end of the output shaft is connected to the valve core, and the rotating ball is rotatably arranged on the outer wall of the output shaft.

[0013] Preferably, the fixed unit includes an inner ring, an inner slot, an outer ring and an outer slot, the inner ring and the outer ring are fixedly connected to the valve cover, the inner slot is opened on the inner ring in a ring shape with equal intervals, the outer slot is opened on the outer ring in a ring shape with equal intervals, the movable unit is movably inserted in the inner slot and the outer slot, and the rotating unit is rotatably connected to the bottom ends of the inner ring and the outer ring.

[0014] Preferably, the movable unit includes an insertion strip, a straight tooth groove and a gear, the insertion strip is movably inserted into the inner slot and the outer slot, the straight tooth groove is opened on the insertion strip, the gear is rotatably arranged in a ring shape with equal intervals on the valve cover near the inner wall of the inner ring and the inner wall of the outer ring, and the gear is meshed and connected with the straight tooth groove.

[0015] Preferably, the rotating unit includes an inner rotating circle, an outer rotating circle, inner teeth and bottom teeth, the inner rotating circle is rotatably connected to the bottom end of the inner ring, the outer rotating circle is rotatably connected to the bottom end of the outer ring, the inner teeth are opened on the inner walls of the inner rotating circle and the outer rotating circle, the bottom teeth are opened on the bottom ends of the inner rotating circle and the outer rotating circle, the inner teeth are meshingly connected to the gear, and the bottom teeth are meshingly connected to the adjusting unit.

[0016] Preferably, the first grooved barrel includes a plurality of first barrel blocks, the inner wall of the first barrel block is provided with a first curved groove, four of the first curved grooves cooperate to form a first spiral slideway, the first barrel block is connected to four of the insertion strips, and the first curved groove is adapted to the size of the rotating sphere.

[0017] Preferably, the second grooved barrel comprises a plurality of second barrel blocks, the inner wall of the second barrel block is provided with a second curved groove, four of the second curved grooves cooperate to form a second spiral channel, the second barrel block is connected to the other four inserts, and the second curved groove is adapted to the size of the rotating sphere; Wherein, the first barrel block and the second barrel block are adjacently and cross-arranged on the insert strip.

[0018] Preferably, a through hole is provided on the valve cover, an adjustment groove is provided on one side of the top end of the valve cover, a placement groove is provided on the inner wall of the adjustment groove, a support plate is provided at the bottom end of the through hole, and the adjustment unit is arranged on the adjustment groove, the placement groove and the support plate.

[0019] Preferably, the adjustment unit includes a motor, a bevel gear A, a bevel gear B, a rotating rod, a driving gear, an electric push rod and a connecting rod. The motor is arranged on the support plate, the bevel gear A is connected to the output end of the motor, the rotating rod is rotatably arranged on the adjustment slot, the bevel gear B is sleeved on one end of the rotating rod, the bevel gear A is meshingly connected with the bevel gear B, the driving gear is slidably sleeved on the end of the rotating rod away from the bevel gear B, the electric push rod is arranged on the placement slot, one end of the connecting rod is connected to the output end of the electric push rod, and the other end of the connecting rod is connected to the driving gear, and the driving gear is adapted to the bottom tooth.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention drives the screw-in unit to rotate and advance in the first groove drum or the second groove drum through the driving unit, and causes the movable unit to move on the fixed unit through the adjusting unit, so that the first groove drum and the second groove drum produce two embracing states, so that when the screw-in unit cooperates with the first groove drum, the valve core is quickly advanced to achieve the use effect of the switch valve, and when the screw-in unit cooperates with the second groove drum, the valve core is slowly and accurately advanced to achieve the use effect of the proportional valve, which greatly reduces the complex logical judgment and cumbersome signal allocation process in the control link, thereby significantly simplifying the control logic of the entire hydraulic system, reducing the requirements for the hardware resources and software algorithm complexity of the control system, and improving the reliability and real-time performance of the control.

[0021] 2. The integrated valve body of the present invention combines the functions of a proportional valve and a switch valve into one, and can flexibly realize the on-off control of the hydraulic oil circuit and the proportional adjustment of flow and pressure on the same valve body according to system requirements. This multifunctional integrated design enables the hydraulic system to better adapt to the working requirements under different working conditions, reduces the additional valve bodies and connecting pipelines required for function switching, and improves the overall reliability and working efficiency of the system.

[0022] 3. Compared with the traditional hydraulic system in which the proportional valve and the switch valve are arranged separately, the integrated valve body of the present invention greatly reduces the number of valve bodies and the complexity and length of the connecting pipelines, which makes the layout of the hydraulic system inside the equipment more compact and reasonable, saves a lot of space, is conducive to the miniaturized design of the equipment and the efficient use of space resources, and is particularly suitable for industrial equipment and mobile mechanical equipment with strict space requirements.

[0023] 4. From the perspective of procurement cost, the batch production of integrated valve bodies in the present invention can reduce the manufacturing cost of a single valve body, while reducing the procurement demand for two different valve bodies, namely proportional valves and switch valves; from the perspective of manufacturing cost analysis, the reduction in the number of valve bodies and connecting parts simplifies the manufacturing process and assembly process, and reduces labor and material costs; from the perspective of maintenance cost, fewer valve bodies means fewer failure points and maintenance workload, and technicians only need to master the maintenance technology of one integrated valve body, which reduces the difficulty and cost of maintenance, thereby reducing the total cost of the hydraulic system over the entire life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of one side of the present invention; Figure 2 It is a schematic diagram of the overall structure of the other side of the present invention; Figure 3 It is a schematic diagram of the internal structure of the valve body of the present invention; Figure 4 It is a schematic diagram of the actuator and valve core structure of the present invention; Figure 5 It is a partial structural schematic diagram of the actuator of the present invention; Figure 6 It is a schematic diagram of the adjustment state structure of the actuator of the present invention; Figure 7 It is a schematic diagram of the structure of the precession unit of the present invention; Figure 8 It is a schematic diagram of the split structure of the first groove drum of the present invention; Fig. 9 It is a schematic diagram of the split structure of the second groove drum of the present invention; Fig.10 It is a schematic diagram of the spiral path structure of the first spiral slideway of the present invention; Fig.11 It is a schematic diagram of the spiral path structure of the second spiral slideway of the present invention; Fig.12 It is a schematic diagram of the fixed unit, movable unit, rotating unit and valve cover structure of the present invention; Fig.13 It is a schematic diagram of one set of structures of the fixed unit and the movable unit of the present invention; Fig.14 It is a schematic diagram of the structure of the rotating unit, the valve cover and the regulating unit of the present invention; Fig.15 It is a schematic diagram of the structure of the rotating unit and the adjusting unit of the present invention.

[0025] Description of the numbers in the figure: 1. Valve body; 2. Valve cavity; 3. First port; 4. Second port; 5. Third port; 6. Valve cover; 7. Carrying unit; 8. Actuator; 9. Valve core; 601, through hole; 602, adjustment slot; 603, placement slot; 604, support plate; 801, driving unit; 802, screwing unit; 803, fixing unit; 804, movable unit; 805, rotating unit; 806, first grooved drum; 807, second grooved drum; 808, adjusting unit; 8011, support frame; 8012, brushed DC motor; 8021, output shaft; 8022, rotating ball; 8031, inner ring; 8032, inner slot; 8033, outer ring; 8034, outer slot; 8041, cutting strip; 8042, straight tooth groove; 8043, gear; 8051, inner circle; 8052, outer circle; 8053, inner teeth; 8054, bottom teeth; 8061, first barrel block; 8062, first curved groove; 8063, first spiral slideway; 8071, second cylinder block; 8072, second curved groove; 8073, second spiral channel; 8081, motor; 8082, bevel gear A; 8083, bevel gear B; 8084, rotating rod; 8085, driving gear; 8086, electric push rod; 8087, connecting rod. DETAILED DESCRIPTION

[0026] like Figures 1 to 15 As shown, the present invention relates to a proportional valve and switch valve mixed control hydraulic system, comprising a valve body 1, a valve cavity 2 is provided inside the valve body 1, a first port 3 is provided at one end of the valve body 1, a second port 4 is provided at the other end of the valve body 1, a third port 5 is provided at the top of the valve body 1, a valve cover 6 is connected to the third port 5 by bolts, a bearing unit 7 is provided on the valve cover 6, an actuator 8 is provided on the bearing unit 7, a valve core 9 is connected to the end of the actuator 8 away from the bearing unit 7, and the valve core 9 is movably inserted in the third port 5; The actuator 8 includes a driving unit 801, a screw-in unit 802, a fixed unit 803, a movable unit 804, a rotating unit 805, a first groove cylinder 806, a second groove cylinder 807 and an adjusting unit 808. The driving unit 801 is arranged at the top of the carrying unit 7, one end of the screw-in unit 802 is connected to the output end of the driving unit 801, and the other end of the screw-in unit 802 is connected to the valve core 9, the fixed unit 803 is arranged on the valve cover 6, the movable unit 804 is movably arranged on the fixed unit 803, the rotating unit 805 is rotatably connected to the bottom end of the fixed unit 803, the first groove cylinder 806 and the second groove cylinder 807 are both arranged on the movable unit 804, and the adjusting unit 808 is arranged on the valve cover 6 and meshedly connected to the bottom end of the rotating unit 805.

[0027] The present invention drives the rotation unit 802 to rotate and advance in the first groove cylinder 806 or the second groove cylinder 807 through the driving unit 801, and causes the movable unit 804 to move on the fixed unit 803 through the adjusting unit 808, so that the first groove cylinder 806 and the second groove cylinder 807 produce two embracing states, so that when the rotation unit 802 cooperates with the first groove cylinder 806, the valve core 9 is quickly advanced to achieve the use effect of the switch valve, and when the rotation unit 802 cooperates with the second groove cylinder 807, the valve core 9 is slowly and accurately advanced to achieve the use effect of the proportional valve, which greatly reduces the complex logical judgment and cumbersome signal allocation process in the control link, thereby significantly simplifying the control logic of the entire hydraulic system, reducing the requirements for the hardware resources and software algorithm complexity of the control system, and improving the reliability and real-time performance of the control.

[0028] In the embodiment of the present invention, the driving unit 801 includes a support frame 8011 and a brushed DC motor 8012, the support frame 8011 is connected to the bearing unit 7, the brushed DC motor 8012 is arranged on the support frame 8011, and the output end of the brushed DC motor 8012 is connected to the screw-in unit 802. The brushed DC motor 8012 used in the present invention has the advantages of low cost, mature technology and high versatility of consumables, and does not need to use the high-precision and high-cost motor of the traditional proportional valve. Its cost advantage and stable performance greatly reduce the cost of use of the enterprise.

[0029] In the embodiment of the present invention, the precession unit 802 includes an output shaft 8021 and a rotating ball 8022. One end of the output shaft 8021 is connected to the output end of the brushed DC motor 8012, and the other end of the output shaft 8021 is connected to the valve core 9. The rotating ball 8022 is rotatably arranged on the outer wall of the output shaft 8021. In the present invention, the output shaft 8021 is driven to rotate by driving the brushed DC motor 8012, and the output shaft 8021 drives the rotating ball 8022 to rotate as a whole. The output shaft 8021 and the output end of the brushed DC motor 8012 in the present invention are rotatably and slidably connected. Therefore, the output shaft 8021 and the output end of the motor in the present invention have a sliding space, and the rotating ball 8022 is rotatably embedded in the ball groove opened on the outer wall of the output shaft 8021.

[0030] In the embodiment of the present invention, the fixed unit 803 includes an inner ring 8031, an inner slot 8032, an outer ring 8033 and an outer slot 8034. The inner ring 8031 ​​and the outer ring 8033 are fixedly connected to the valve cover 6. The inner slot 8032 is arranged on the inner ring 8031 ​​in an annular shape with equal intervals. The outer slot 8034 is arranged on the outer ring 8033 in an annular shape with equal intervals. The movable unit 804 is movably inserted in the inner slot 8032 and the outer slot 8034. The rotating unit 805 is rotatably connected to the bottom ends of the inner ring 8031 ​​and the outer ring 8033. Fig.12 and Fig.13 As shown, the inner ring 8031 ​​of the present invention is provided with eight inner slots 8032 , and the outer ring 8033 is provided with eight outer slots 8034 . The inner slots 8032 and the outer slots 8034 are L-shaped and open at the upper ends.

[0031] The movable unit 804 includes an insertion strip 8041, a straight tooth groove 8042 and a gear 8043. The insertion strip 8041 is movably inserted into the inner slot 8032 and the outer slot 8034. The straight tooth groove 8042 is provided on the insertion strip 8041. The gear 8043 is rotatably arranged in a circular shape and at equal intervals on the valve cover 6 near the inner wall of the inner ring 8031 ​​and the inner wall of the outer ring 8033. The gear 8043 is meshed and connected with the straight tooth groove 8042. The inner end of the insertion strip 8041 in the present invention is movably inserted into the inner slot 8032, and the outer end of the insertion strip 8041 is movably inserted into the outer slot 8034. Four gears 8043 are rotatably set at a position of the valve cover 6 close to the inner wall of the inner ring 8031, and another four gears 8043 are rotatably set at a position of the valve cover 6 close to the inner wall of the outer ring 8033. When the rotating unit 805 drives the gear 8043 to rotate, the top end of the gear 8043 engages with the straight tooth groove 8042, so that the straight tooth groove 8042 drives the insertion strip 8041 to move on the inner slot 8032 or the outer slot 8034.

[0032] As another embodiment of the present invention, the rotating unit 805 includes an inner rotating circle 8051, an outer rotating circle 8052, inner teeth 8053 and bottom teeth 8054. The inner rotating circle 8051 is rotatably connected to the bottom end of the inner ring 8031, the outer rotating circle 8052 is rotatably connected to the bottom end of the outer ring 8033, the inner teeth 8053 are arranged on the inner walls of the inner rotating circle 8051 and the outer rotating circle 8052, the bottom teeth 8054 are arranged on the bottom ends of the inner rotating circle 8051 and the outer rotating circle 8052, the inner teeth 8053 are meshedly connected to the gear 8043, and the bottom teeth 8054 are meshedly connected to the adjusting unit 808. The inner rotating circle 8051 and the outer rotating circle 8052 in the present invention are both provided with inner teeth 8053 and bottom teeth 8054. When the adjusting unit 808 drives the bottom teeth 8054 to rotate, the bottom teeth 8054 drives the inner rotating circle 8051 or the outer rotating circle 8052 to rotate, and the inner rotating circle 8051 or the outer rotating circle 8052 drives the inner teeth 8053 to rotate, and the inner teeth 8053 drives the gear 8043 to rotate.

[0033] As another embodiment of the present invention, the first groove cylinder 806 includes a plurality of first cylinder blocks 8061, and a first curved groove 8062 is opened on the inner wall of the first cylinder block 8061. The four first curved grooves 8062 cooperate to form a first spiral slideway 8063. The first cylinder block 8061 is connected to four of the insertion strips 8041, and the first curved groove 8062 is adapted to the size of the rotating ball 8022. In the present invention, when the adjustment unit 808 drives the inner rotating circle 8051 to rotate, the inner rotating circle 8051 drives the inner teeth 8053 to rotate, and the inner teeth 8053 drives the gear 8043 to rotate. The top of the gear 8043 meshes with the straight tooth groove 8042, so that the straight tooth groove 8042 drives the insertion strip 8041 to move on the inner slot 8032, and the insertion strip 8041 drives the four first barrel blocks 8061 set on its top to move synchronously to achieve inward contraction or expansion. When the four first barrel blocks 8061 are synchronously contracted, the first curved grooves 8062 opened on the four first barrel blocks 8061 form a first spiral slideway 8063, as shown in FIG. Figure 8 and Fig.10 As shown, when the brushed DC motor 8012 drives the output shaft 8021 and the rotating ball 8022 to rotate, the rotating ball 8022 slides in the first spiral slide 8063. Due to the limit of the rotating ball 8022 and the first spiral slide 8063 and the first spiral slide 8063 having two spiral circles, the output shaft 8021 drives the valve core 9 to descend quickly, thereby achieving the use effect of the switch valve.

[0034] As another embodiment of the present invention, the second grooved barrel 807 includes a plurality of second barrel blocks 8071, and a second curved groove 8072 is opened on the inner wall of the second barrel block 8071. The four second curved grooves 8072 cooperate to form a second spiral channel 8073. The second barrel block 8071 is connected to the other four insertion strips 8041, and the second curved grooves 8072 are adapted to the size of the rotating sphere 8022; wherein, the first barrel block 8061 and the second barrel block 8071 are adjacently and cross-arranged on the insertion strip 8041. In the present invention, when the adjustment unit 808 drives the outer rotating circle 8052 to rotate, the outer rotating circle 8052 drives the inner teeth 8053 to rotate, and the inner teeth 8053 drives the gear 8043 to rotate. The top of the gear 8043 meshes with the straight tooth groove 8042, so that the straight tooth groove 8042 drives the insertion strip 8041 to move on the outer slot 8034, and the insertion strip 8041 drives the four second barrel blocks 8071 set on its top to move synchronously to achieve inward contraction or expansion. When the four second barrel blocks 8071 are synchronously contracted, the second curved grooves 8072 opened on the four second barrel blocks 8071 form a second spiral channel 8073, such as Fig. 9 and Fig.11 As shown, when the brushed DC motor 8012 drives the output shaft 8021 and the rotating ball 8022 to rotate, the rotating ball 8022 slides in the second spiral channel 8073. Due to the limit of the rotating ball 8022 and the second spiral channel 8073 and the fact that the second spiral channel 8073 has a total of ten spiral turns, the output shaft 8021 drives the valve core 9 to slowly descend, thereby achieving the use effect of the proportional valve.

[0035] As another embodiment of the present invention, a through hole 601 is provided on the valve cover 6, an adjustment groove 602 is provided on one side of the top end of the valve cover 6, a placement groove 603 is provided on the inner wall of the adjustment groove 602, a support plate 604 is provided at the bottom end of the through hole 601, and the adjustment unit 808 is arranged on the adjustment groove 602, the placement groove 603 and the support plate 604.

[0036] As another embodiment of the present invention, the adjustment unit 808 includes a motor 8081, a bevel gear A8082, a bevel gear B8083, a rotating rod 8084, a driving gear 8085, an electric push rod 8086 and a connecting rod 8087. The motor 8081 is arranged on the support plate 604, the bevel gear A8082 is connected to the output end of the motor 8081, the rotating rod 8084 is rotatably arranged on the adjustment slot 602, the bevel gear B8083 is sleeved on one end of the rotating rod 8084, the bevel gear A8082 is meshed and connected with the bevel gear B8083, the driving gear 8085 is slidably sleeved on the end of the rotating rod 8084 away from the bevel gear B8083, the electric push rod 8086 is arranged on the placement slot 603, one end of the connecting rod 8087 is connected to the output end of the electric push rod 8086, and the other end of the connecting rod 8087 is connected to the driving gear 8085, and the driving gear 8085 is adapted to the bottom gear 8054. In the present invention, the electric push rod 8086 drives the connecting rod 8087 to move, and the connecting rod 8087 drives the driving gear 8085 to move on the rotating rod 8084, so that the driving gear 8085 can be selected to mesh with the bottom teeth 8054 of the inner rotating circle 8051 or the bottom teeth 8054 of the outer rotating circle 8052. Fig.15 As shown; The driving gear 8085 and the rotating rod 8084 in the present invention are slidably but non-rotatably connected, the driving motor 8081 drives the bevel gear A8082 to rotate, the bevel gear A8082 drives the bevel gear B8083 to rotate, the bevel gear B8083 drives the rotating rod 8084 to rotate, the rotating rod 8084 drives the driving gear 8085 to rotate, and the driving gear 8085 engages with the bottom gear 8054 to drive the inner rotating circle 8051 or the outer rotating circle 8052 to rotate.

[0037] Working principle: This embodiment provides a method for adjusting a hydraulic system with a proportional valve and a switch valve mixed control, comprising the following steps: S1, valve body state adjustment operation; Select the specific usage status according to the function of the proportional valve or switch valve required; S1.1. If the valve state needs to be switched, first drive the electric push rod 8086 to drive the connecting rod 8087 to move, and the connecting rod 8087 drives the driving gear 8085 to move on the rotating rod 8084, and selects the driving gear 8085 to mesh with the bottom tooth 8054 of the inner rotating circle 8051, and the driving motor 8081 drives the bevel gear A 8082 to rotate, and the bevel gear A 8082 drives the bevel gear B 8083 to rotate, and the bevel gear B 8083 drives the rotating rod 8084 to rotate, and the rotating rod 8084 drives the driving gear 8085 to rotate, and the driving gear 8085 meshes with the bottom tooth 8054 to drive the inner rotating circle 8051 to rotate, and the inner rotating circle 8051 drives the inner tooth 8053 to rotate, and the inner tooth 8053 drives the gear 8043 to rotate, and the top of the gear 8043 meshes with the straight tooth groove 8042 The straight tooth groove 8042 drives the inserting strip 8041 to move on the inner slot 8032, and the inserting strip 8041 drives the four first barrel blocks 8061 arranged on the top thereof to move synchronously to achieve inward contraction or expansion. When the four first barrel blocks 8061 are synchronously inwardly contracted, the first curved grooves 8062 provided on the four first barrel blocks 8061 form a first spiral slideway 8063. When the brushed DC motor 8012 drives the output shaft 8021 and the rotating ball 8022 to rotate, the rotating ball 8022 slides in the first spiral slideway 8063. Since the rotating ball 8022 and the first spiral slideway 8063 are limited and the first spiral slideway 8063 has two spiral circles, the output shaft 8021 drives the valve core 9 to descend rapidly, thereby achieving the use effect of the switch valve. S1.2, if the proportional valve state is required, first drive the electric push rod 8086 to drive the connecting rod 8087 to move, the connecting rod 8087 drives the driving gear 8085 to move on the rotating rod 8084, select the driving gear 8085 to mesh with the bottom tooth 8054 of the outer rotating circle 8052, the outer rotating circle 8052 drives the inner tooth 8053 to rotate, the inner tooth 8053 drives the gear 8043 to rotate, the top of the gear 8043 meshes with the straight tooth groove 8042, so that the straight tooth groove 8042 drives the insert 8041 to move on the outer slot 8034, and the insert 8041 drives the four second barrel blocks 807 set at its top 1 move synchronously to achieve inward contraction or expansion. When the four second cylinder blocks 8071 are synchronously contracted, the second curved grooves 8072 provided on the four second cylinder blocks 8071 form a second spiral channel 8073. When the brushed DC motor 8012 drives the output shaft 8021 and the rotating ball 8022 to rotate, the rotating ball 8022 slides in the second spiral channel 8073. Due to the limit of the rotating ball 8022 and the second spiral channel 8073 and the second spiral channel 8073 having a total of ten spiral turns, the output shaft 8021 drives the valve core 9 to slowly descend, thereby achieving the use effect of the proportional valve.

[0038] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A proportional valve and switch valve mixed control hydraulic system, characterized in that: The valve body (1) comprises a valve chamber (2) provided inside the valve body (1), a first opening (3) provided at one end of the valve body (1), a second opening (4) provided at the other end of the valve body (1), a third opening (5) provided at the top end of the valve body (1), a valve cover (6) connected to the third opening (5) by bolts, a bearing unit (7) provided on the valve cover (6), an actuator (8) provided on the bearing unit (7), a valve core (9) connected to one end of the actuator (8) away from the bearing unit (7), and the valve core (9) movably inserted in the third opening (5); The actuator (8) comprises a driving unit (801), a precession unit (802), a fixing unit (803), a movable unit (804), a rotating unit (805), a first grooved cylinder (806), a second grooved cylinder (807) and an adjusting unit (808), wherein the driving unit (801) is arranged at the top of the bearing unit (7), one end of the precession unit (802) is connected to the output end of the driving unit (801), and the other end of the precession unit (802) is connected to the output end of the bearing unit (7). The valve core (9) is provided with the fixed unit (803) on the valve cover (6), the movable unit (804) is movably provided on the fixed unit (803), the rotating unit (805) is rotatably connected to the bottom end of the fixed unit (803), the first groove cylinder (806) and the second groove cylinder (807) are both provided on the movable unit (804), and the adjusting unit (808) is provided on the valve cover (6) and is meshingly connected to the bottom end of the rotating unit (805).

2. A proportional valve and switch valve mixed control hydraulic system according to claim 1, characterized in that: The driving unit (801) comprises a support frame (8011) and a brushed DC motor (8012); the support frame (8011) is connected to the bearing unit (7); the brushed DC motor (8012) is arranged on the support frame (8011); and an output end of the brushed DC motor (8012) is connected to the precession unit (802).

3. A proportional valve and switch valve mixed control hydraulic system according to claim 2, characterized in that: The precession unit (802) comprises an output shaft (8021) and a rotating ball (8022), one end of the output shaft (8021) is connected to the output end of the brushed DC motor (8012), the other end of the output shaft (8021) is connected to the valve core (9), and the rotating ball (8022) is rotatably arranged on the outer wall of the output shaft (8021).

4. A proportional valve and switch valve hybrid control hydraulic system according to claim 3, characterized in that: The fixed unit (803) comprises an inner ring (8031), an inner slot (8032), an outer ring (8033) and an outer slot (8034); the inner ring (8031) and the outer ring (8033) are both fixedly connected to the valve cover (6); the inner slot (8032) is arranged on the inner ring (8031) in a circular shape with equal intervals; the outer slot (8034) is arranged on the outer ring (8033) in a circular shape with equal intervals; the movable unit (804) is movably inserted into the inner slot (8032) and the outer slot (8034); and the rotating unit (805) is rotatably connected to the bottom ends of the inner ring (8031) and the outer ring (8033).

5. A proportional valve and switch valve mixed control hydraulic system according to claim 4, characterized in that: The movable unit (804) comprises an insertion strip (8041), a straight tooth groove (8042) and a gear (8043); the insertion strip (8041) is movably inserted into the inner slot (8032) and the outer slot (8034); the straight tooth groove (8042) is provided on the insertion strip (8041); the gear (8043) is rotatably arranged in a circular shape at equal intervals on a position of the valve cover (6) close to the inner wall of the inner ring (8031) and the inner wall of the outer ring (8033); the gear (8043) is meshedly connected with the straight tooth groove (8042).

6. A proportional valve and switch valve hybrid control hydraulic system according to claim 5, characterized in that: The rotating unit (805) comprises an inner rotating circle (8051), an outer rotating circle (8052), inner teeth (8053) and bottom teeth (8054); the inner rotating circle (8051) is rotatably connected to the bottom end of the inner ring (8031); the outer rotating circle (8052) is rotatably connected to the bottom end of the outer ring (8033); the inner teeth (8053) are arranged on the inner walls of the inner rotating circle (8051) and the outer rotating circle (8052); the bottom teeth (8054) are arranged on the bottom ends of the inner rotating circle (8051) and the outer rotating circle (8052); the inner teeth (8053) are meshingly connected to the gear (8043); and the bottom teeth (8054) are meshingly connected to the adjusting unit (808).

7. A proportional valve and switch valve hybrid control hydraulic system according to claim 6, characterized in that: The first grooved barrel (806) comprises a plurality of first barrel blocks (8061), the inner wall of each of the first barrel blocks (8061) being provided with a first curved groove (8062), four of the first curved grooves (8062) cooperating to form a first spiral slideway (8063), the first barrel block (8061) being connected to four of the inserts (8041), and the first curved grooves (8062) being adapted in size to the rotating sphere (8022).

8. A proportional valve and switch valve hybrid control hydraulic system according to claim 7, characterized in that: The second grooved barrel (807) comprises a plurality of second barrel blocks (8071), the inner wall of each second barrel block (8071) is provided with a second curved groove (8072), four of the second curved grooves (8072) cooperate to form a second spiral channel (8073), the second barrel block (8071) is connected to the other four inserts (8041), and the second curved grooves (8072) are adapted in size to the rotating sphere (8022); Wherein, the first barrel block (8061) and the second barrel block (8071) are adjacently and cross-arranged on the insert strip (8041).

9. A proportional valve and switch valve hybrid control hydraulic system according to claim 8, characterized in that: The valve cover (6) is provided with a through hole (601), a top side of the valve cover (6) is provided with an adjustment groove (602), an inner wall of the adjustment groove (602) is provided with a placement groove (603), a support plate (604) is provided at the bottom end of the through hole (601), and the adjustment unit (808) is arranged on the adjustment groove (602), the placement groove (603) and the support plate (604).

10. A proportional valve and switch valve hybrid control hydraulic system according to claim 9, characterized in that: The adjusting unit (808) comprises a motor (8081), a bevel gear A (8082), a bevel gear B (8083), a rotating rod (8084), a driving gear (8085), an electric push rod (8086) and a connecting rod (8087); the motor (8081) is arranged on the supporting plate (604); the bevel gear A (8082) is connected to the output end of the motor (8081); the rotating rod (8084) is rotatably arranged on the adjusting slot (602); the bevel gear B (8083) is sleeved on the rotating rod (8084); end, the bevel gear A (8082) is meshedly connected with the bevel gear B (8083), the driving gear (8085) is slidably sleeved on the end of the rotating rod (8084) away from the bevel gear B (8083), the electric push rod (8086) is arranged on the placement groove (603), one end of the connecting rod (8087) is connected to the output end of the electric push rod (8086), and the other end of the connecting rod (8087) is connected to the driving gear (8085), and the driving gear (8085) is adapted to the bottom gear (8054).

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