A hydraulic mechanism capable of realizing remote control of an operating handle

Abstract

The invention discloses a hydraulic mechanism capable of realizing remote control of an operating handle, which comprises a main valve body, a main valve core which penetrates the main valve body front and back, a rotating shaft which penetrates the main valve body left and right, a front sealing cover connected to the front end of the main valve body, a rear sealing cover connected to the rear end of the main valve body, and a joystick fixed to an axial end of the rotating shaft, a front half of the main valve core is fixedly connected to the rotating shaft, a compression spring is provided on the rear half of the main valve core, a front oil chamber is provided on the front sealing cover, a spring chamber and a rear oil chamber are coaxially provided on the rear sealing cover front and back, the front oil chamber, the inner chamber of the main valve body, the spring chamber and the rear oil chamber are connected in sequence, the compression spring is restricted in the spring chamber, the front oil chamber and the rear oil chamber are switched to supply oil by remote control so that the joystick swings back and forth, and the pressure of the oil supply to the remote control front oil chamber or the rear oil chamber determines the swing angle of the joystick; the advantages are that the mechanism can be integrated in an operating room with a small space, remote and timely control of the hydraulic motor can be realized, and stepless speed regulation of the hydraulic motor can be realized.

Description

Technical Field

[0001] The invention relates to a remote control technology, and in particular to a hydraulic mechanism capable of realizing remote control of an operating handle. Background Art

[0002] With the rapid development of industrial automation technology and the shipbuilding industry, customers are increasingly demanding remote operation and control of hydraulic actuators (such as hydraulic motors and hydraulic cylinders) in shipbuilding, lifting and other working conditions, and improving the degree of automation, integration and matching of equipment.

[0003] At present, many environments cannot meet the requirements of on-site operation and control of equipment, such as: small operating rooms with inconvenient operation; long distances between the operating room and the equipment, which make it impossible to operate in time; places with safety risks in the work area; and places with automation and integrated control requirements. In these environments, remote operation and control is the best choice, but there is currently no remote control component available in China. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a hydraulic mechanism capable of realizing remote control of an operating handle, which can be integrated in a small operating room, can realize remote and timely control of a hydraulic motor, and can realize stepless speed regulation of the hydraulic motor.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a hydraulic mechanism capable of realizing remote control of an operating handle, characterized in that it includes a main valve body, a main valve core penetrating the main valve body from front to back, a rotating shaft penetrating the main valve body from left to right, a front cover connected to the front end of the main valve body, a rear cover connected to the rear end of the main valve body, and a joystick fixed to one axial end of the rotating shaft, the front half of the main valve core is fixedly connected to the rotating shaft, the rear half of the main valve core is provided with a compression spring, the front cover is provided with a front oil chamber, and the rear cover is coaxially provided with a front and rear oil chamber. There are a spring chamber and a rear oil chamber, the front oil chamber, the inner chamber of the main valve body, the spring chamber, and the rear oil chamber are connected in sequence, when the main valve core is in the middle position, the front half of the main valve core is located in the main valve body and the rear half of the main valve core is located in the spring chamber and the rear oil chamber, the compression spring is restricted in the spring chamber, the joystick is located outside the main valve body, the front oil chamber and the rear oil chamber are switched to supply oil by remote control to make the joystick swing back and forth, and the pressure of the oil supply to the remotely controlled front oil chamber or the rear oil chamber determines the swing angle of the joystick.

[0006] The main valve body is provided with a first through hole for the main valve core to move forward and backward. When the main valve core is in the middle position, the front half of the main valve core is located in the first through hole. The front oil chamber, the first through hole, the spring chamber, and the rear oil chamber are coaxially connected in sequence. The main valve body is provided with a second through hole for the shaft to rotate in the left and right directions. The first through hole is connected with the second through hole to form the inner cavity of the main valve body. The front oil chamber, the first through hole, the spring chamber, and the rear oil chamber are coaxially connected in sequence to form a movement space for the main valve core to move forward and backward.

[0007] The diameter of the front half of the main valve core is larger than that of the rear half, and spring seats are sleeved on the front and rear ends of the rear half of the main valve core. A locking nut is threaded on the rear end of the rear half of the main valve core, and the compression spring is limited between the two spring seats. The diameter of the spring cavity is larger than the diameter of the first through hole and the diameter of the rear oil cavity, and the spring seat is adapted to the spring cavity. Since the diameter of the front half of the main valve core is larger than that of the rear half, a step is formed, and a locking nut is threaded on the rear end of the rear half of the main valve core. Therefore, the two spring seats cannot be separated from the rear half of the main valve core. When oil enters the front oil chamber, the main valve core moves backward, and the step part pushes the adjacent spring seat backward to compress the compression spring. When oil enters the rear oil chamber, the main valve core moves forward, and the pressure oil acts on the locking nut and acts on the rear half of the main valve core through the holes on the end face of the adjacent spring seat to contact the end face of the spring seat at the far end, thereby pushing the main valve core forward to compress the compression spring; when the compression spring is reset, the main valve core returns to the neutral position.

[0008] An axis fixing mechanism is arranged between the front half of the main valve core and the rotating shaft, and the axis fixing mechanism comprises a push pin, an elastic cylindrical pin, a first limiting hole radially opened on the front half of the main valve core and matched with the pin head of the push pin, a first pin hole radially opened on the rotating shaft and matched with the pin body of the push pin, a second limiting hole radially opened on the rotating shaft and matched with the elastic cylindrical pin, and a second pin hole radially opened on the pin body of the push pin and matched with the elastic cylindrical pin, the pin body of the push pin is inserted into the first pin hole and the elastic cylindrical pin is aligned and inserted into the second limiting hole and the second pin hole to realize the fixing of the push pin and the rotating shaft, and the pin head of the push pin is inserted into the first limiting hole to realize the fixing of the push pin and the front half of the main valve core. A shaft fixing mechanism between the main valve core and the rotating shaft is defined herein. This structure is simple and easy to operate. During installation, the pin body of the push pin is inserted into the first pin hole on the rotating shaft, the second limiting hole is aligned with the second pin hole, the elastic cylindrical pin is inserted, and the rotating shaft with the push pin is installed into the main valve body, so that the pin head of the push pin is inserted into the first limiting hole on the main valve core.

[0009] The first through hole and the second through hole partially overlap, the first through hole is on the top and the second through hole is on the bottom, the side wall of the front half of the main valve core is flattened to form an inwardly concave plane, and the concave plane faces the rotating shaft. Here, the specific positional relationship between the first through hole and the second through hole is defined, and the front half of the main valve core has a concave plane, so that the overall height of the main valve body can be reduced.

[0010] The front cover is also provided with a front oil channel connected to the front oil chamber, and the rear cover is also provided with a rear oil channel connected to the rear oil chamber. The hydraulic mechanism also includes an electromagnetic reversing valve for realizing the oil inlet switching between the front oil channel and the rear oil channel, and an electromagnetic proportional pressure valve for realizing the pressure of the oil inlet of the front oil channel or the rear oil channel. The electromagnetic reversing valve is controlled by a remote electrical signal to make the joystick swing forward and backward, and the electromagnetic proportional pressure valve is controlled by a remote electrical signal to determine the angle of the joystick swinging forward and backward. The front oil channel and the rear oil channel are oil inlet and outlet channels. The electromagnetic reversing valve can switch whether the oil is inlet from the front oil channel or the rear oil channel, so that the joystick swings backward or forward; the electromagnetic proportional pressure valve can control the pressure of the inlet oil, thereby controlling the swing amplitude of the joystick. The swing amplitude of the joystick acts on the operating handle of the manual proportional valve, thereby controlling the flow direction of the hydraulic oil in the manual proportional valve and the proportional linear output of the hydraulic oil flow.

[0011] A rotating operating part is coaxially extended from one end of the rotating shaft, and the rotating operating part is located outside the main valve body. A fixing hole adapted to the rotating operating part is provided at the lower part of the joystick. A linkage mechanism is provided between the rotating operating part and the joystick to drive the joystick to swing when the rotating shaft rotates, and a clamping mechanism for clamping the rotating operating part is provided on the joystick. The rotating operating part is connected to the joystick through the linkage mechanism, and when the rotating shaft rotates, the rotating operating part drives the joystick to swing through the linkage mechanism; a clamping mechanism is provided to prevent the rotating operating part from being disengaged from the joystick.

[0012] The linkage mechanism includes a flat key, a first keyway axially provided on the rotating operating part, and a second keyway axially provided on the hole wall of the fixing hole. The first keyway and the second keyway are relatively spliced ​​to form a key cavity adapted to the flat key. The flat key cooperates with the key cavity to realize the linkage between the rotating shaft and the operating rod. The clamping mechanism includes two clamping blocks and a fastener capable of applying force to the two clamping blocks so that the two clamping blocks clamp the rotating operating part. The operating rod is provided with an opening connected to the fixing hole from the bottom to the top. The opening forms two clamping blocks at the part of the operating rod below the fixing hole. The use of the flat key to realize the linkage between the rotating shaft and the operating rod is not only simple in structure, but also avoids the operation trouble and easy loosening and falling off problems existing in the use of screws. An opening is provided on the operating rod, so that the two sides of the opening can be squeezed inward under the action of force. When the fastener is tightened, the two clamping blocks are squeezed inward so that the part of the fixing hole close to the opening is squeezed inward to clamp the rotating operating part. The fastener can adopt the matching structure of screws and nuts.

[0013] The left and right sides of the main valve body are fixed with rotating shaft blind covers, the shaft end of the rotating shaft is movably embedded in the rotating shaft blind cover, and sealing structures for preventing pressure oil from leaking from the connection gap are arranged between the rotating shaft blind cover and the side end of the main valve body, between the rotating shaft and the rotating shaft blind cover, between the front cover and the front end of the main valve body, and between the rear cover and the rear end of the main valve body. A skeleton oil seal is arranged between the shaft end of the rotating shaft close to the rotating operating part and the rotating shaft blind cover on the same side. The rotating shaft blind cover is arranged to prevent dust and the like from entering the inner cavity of the main valve body; since there are inevitably gaps between the connections between components, in order to prevent pressure oil from leaking out from these gaps, and to prevent external dust, water vapor, etc. from entering the inner cavity of the main valve body, the sealing structure is reasonably installed, and the sealing structure can adopt conventional technical means, such as the matching structure of annular grooves and O-rings.

[0014] The upper part of the joystick is connected with a fork plate for connecting with the operating handle of the external manual proportional valve. The rotation of the shaft causes the joystick to swing forward and backward, and the fork plate swings forward and backward with the joystick, so that the operating handle of the external manual proportional valve moves, thereby realizing the control of the hydraulic motor by the external manual proportional valve.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] 1) The oil inlet of the front oil chamber and the rear oil chamber can be switched by remote control. When the front oil chamber is filled with oil, the main valve core moves backward, driving the rotating shaft to rotate, so that the joystick swings backward. When the rear oil chamber is filled with oil, the main valve core moves forward, driving the rotating shaft to rotate in the opposite direction, so that the joystick swings forward. The joystick is connected to the operating handle of the manual proportional valve to realize the control of the hydraulic motor; the oil inlet pressure of the front oil chamber or the rear oil chamber can be remotely controlled, so that the swing angle of the joystick can be controlled, so that the angle of the manual proportional valve can be linearly controlled according to actual needs, so as to realize stepless speed regulation of the hydraulic motor and provide a stable flow output for the hydraulic motor.

[0017] 2) The front oil chamber and the rear oil chamber of the hydraulic mechanism are connected to an independent system through an oil pipe, and the joystick can be remotely controlled to swing forward and backward through a remote electrical signal, which solves the problem of remote operation of the manual proportional valve in controlling the hydraulic motor, replaces manual operation, and improves operating efficiency. On the one hand, the installation space of the hydraulic mechanism is small, and the operation can be integrated into the operating room without the problem of inconvenient operation. On the other hand, timely operation can be achieved even if the operating room is far away from the equipment being used.

[0018] 3) The hydraulic mechanism can be used in operating rooms with small spaces, where the operating room is far away from the equipment, where there are safety risks in the working area, and where there is a need for automated and integrated control.

[0019] 4) Since the hydraulic mechanism is hydraulically driven, it is particularly suitable for occasions such as oil tankers, natural gas tankers, etc. that have flame retardant and explosion-proof requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure of the hydraulic mechanism of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 2 The overall structure of the hydraulic mechanism of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 3 It is a front view of the hydraulic mechanism of the present invention;

[0023] Figure 4 for Figure 3 AA section view;

[0024] Figure 5 is a side view of the hydraulic mechanism of the present invention;

[0025] Figure 6 for Figure 5 DD section view;

[0026] Figure 7 for Figure 6 EE section view;

[0027] Figure 8 The decomposition structure of the hydraulic mechanism of the present invention is shown in FIG. Figure 1 ;

[0028] Fig. 9 The decomposition structure of the hydraulic mechanism of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings.

[0030] The present invention proposes a hydraulic mechanism capable of realizing remote control of an operating handle, as shown in the figure, which comprises a main valve body 1, a main valve core 2 penetrating the main valve body 1 from front to back, a rotating shaft 3 penetrating the main valve body 1 from left to right, a front cover 4 connected to the front end of the main valve body 1, a rear cover 5 connected to the rear end of the main valve body 1, and a joystick 6 fixed to one end of the rotating shaft 3. The front half 21 of the main valve core 2 is fixedly connected to the rotating shaft 3, the rear half 22 of the main valve core 2 is provided with a compression spring 7, the front cover 4 is provided with a front oil chamber 41, and the rear cover 5 is coaxially provided with a front and rear oil chamber 42. There are a spring chamber 51 and a rear oil chamber 52. The front oil chamber 41, the inner cavity of the main valve body 1, the spring chamber 51, and the rear oil chamber 52 are connected in sequence. When the main valve core 2 is in the middle position, the front half 21 of the main valve core 2 is located in the main valve body 1 and the rear half 22 of the main valve core 2 is located in the spring chamber 51 and the rear oil chamber 52. The compression spring 7 is restricted in the spring chamber 51. The joystick 6 is located outside the main valve body 1. The front oil chamber 41 and the rear oil chamber 52 are switched to supply oil remotely to make the joystick 6 swing back and forth. The pressure of the oil supply to the remotely controlled front oil chamber 41 or the rear oil chamber 52 determines the swing angle of the joystick 6.

[0031] The specific plan is that a first through hole 11 is opened on the main valve body 1 from front to back for the main valve core 2 to move forward and backward. When the main valve core 2 is in the middle position, the front half 21 of the main valve core 2 is located in the first through hole 11, and the front oil chamber 41, the first through hole 11, the spring chamber 51, and the rear oil chamber 52 are coaxially connected in sequence. A second through hole 12 is opened on the main valve body 1 from left to right for the rotating shaft 3 to rotate. The first through hole 11 is connected to the second through hole 12 to form an inner cavity of the main valve body 1, and the front oil chamber 41, the first through hole 11, the spring chamber 51, and the rear oil chamber 52 are coaxially connected in sequence to form a movement space for the main valve core 2 to move forward and backward.

[0032] The specific solution is that the diameter of the front half 21 of the main valve core 2 is larger than the diameter of the rear half 22, and a spring seat 23 is sleeved on the front and rear ends of the rear half 22 of the main valve core 2. A locking nut 24 is screwed on the rear end of the rear half 22 of the main valve core 2, and the compression spring 7 is restricted between the two spring seats 23. The diameter of the spring cavity 51 is larger than the diameter of the first through hole 11 and the diameter of the rear oil cavity 52, and the spring seat 23 is adapted to the spring cavity 51. Since the diameter of the front half 21 of the main valve core 2 is larger than the diameter of the rear half 22, a step is formed, and a locking nut 24 is screwed on the rear end head of the rear half 22 of the main valve core 2, so the two spring seats 23 cannot be separated from the rear half 22 of the main valve core 2. When the front oil chamber 41 is filled with oil, the main valve core 2 moves backward, and the step part pushes the adjacent spring seat 23 to move backward so that the compression spring 7 is compressed. When the rear oil chamber 52 is filled with oil, since there are four holes (as oil holes) distributed on the end face of the spring seat 23 adjacent to the locking nut 24, the pressure oil in the rear oil chamber 52 acts on the locking nut 24 and acts on the rear half 22 of the main valve core 2 through the holes on the end face of the adjacent spring seat 23 to contact the end face of the spring seat 23 at the far end, thereby pushing the main valve core 2 to move forward, and the forward movement compresses the compression spring 7; when the compression spring 7 is reset, the main valve core 2 returns to the center position.

[0033] A more optimal solution is that an axis fixing mechanism 8 is arranged between the front half 21 of the main valve core 2 and the rotating shaft 3, and the axis fixing mechanism 8 includes a push pin 81, an elastic cylindrical pin 82, a first limiting hole 83 radially opened on the front half 21 of the main valve core 2 and adapted to the pin head of the push pin 81, a first pin hole 84 radially opened on the rotating shaft 3 and adapted to the pin body of the push pin 81, a second limiting hole 85 radially opened on the rotating shaft 3 and adapted to the elastic cylindrical pin 82, and a second pin hole 86 radially opened on the pin body of the push pin 81 and adapted to the elastic cylindrical pin 82, the pin body of the push pin 81 is inserted into the first pin hole 84 and the elastic cylindrical pin 82 is aligned and inserted into the second limiting hole 85 and the second pin hole 86 to realize the fixation of the push pin 81 and the rotating shaft 3, and the pin head of the push pin 81 is inserted into the first limiting hole 83 to realize the fixation of the push pin 81 and the front half 21 of the main valve core 2. A shaft fixing mechanism 8 between the main valve core 2 and the rotating shaft 3 is defined herein. This structure is simple and easy to operate. During installation, the pin body of the push pin 81 is inserted into the first pin hole 84 on the rotating shaft 3, the second limiting hole 85 is aligned with the second pin hole 86, and the elastic cylindrical pin 82 is inserted. Since the diameter of the second through hole 12 is designed to be larger than the diameter of the rotating shaft 3 during design, the rotating shaft 3 with the push pin 81 can be installed into the second through hole 12 on the main valve body 1, and then the pin head of the push pin 81 is inserted into the first limiting hole 83 on the main valve core 2, and the two shaft ends of the rotating shaft 3 are fixed by the rotating shaft cover 9, so that the push pin 81 is always connected to the rotating shaft 3 and the main valve core 2.

[0034] A further solution is that the first through hole 11 and the second through hole 12 partially overlap, the first through hole 11 is on the top and the second through hole 12 is on the bottom, and the side wall of the front half 21 of the main valve core 2 is flattened to form an inwardly concave plane 25, and the concave plane 25 faces the rotating shaft 3. Here, the specific positional relationship between the first through hole 11 and the second through hole 12 is defined, and the front half 21 of the main valve core 2 has a concave plane 25, so that the overall height of the main valve body 1 can be reduced.

[0035] A better solution is that the front cover 4 is also provided with a front oil channel 42 connected to the front oil chamber 41, and the rear cover 5 is also provided with a rear oil channel 53 connected to the rear oil chamber 52. The hydraulic mechanism also includes an electromagnetic reversing valve (not shown in the figure) for realizing the oil inlet switching between the front oil channel 42 and the rear oil channel 53, and an electromagnetic proportional pressure valve (not shown in the figure) for realizing the pressure of the oil inlet to the front oil channel 42 or the rear oil channel 53. The electromagnet of the electromagnetic reversing valve is controlled by a remote electrical signal to make the joystick 6 swing back and forth, and the electromagnet of the electromagnetic proportional pressure valve is controlled by a remote electrical signal to determine the swing angle of the joystick 6 back and forth. The front oil channel 42 and the rear oil channel 53 are oil inlet and outlet channels. The electromagnetic reversing valve can switch whether to feed oil from the front oil channel 42 or the rear oil channel 53, so that the joystick 6 can swing backward or forward; the electromagnetic proportional pressure valve can control the pressure of the inlet oil, thereby controlling the swing amplitude of the joystick 6. The swing amplitude of the joystick acts on the operating handle of the manual proportional valve, thereby controlling the flow direction of the hydraulic oil in the manual proportional valve and the proportional linear output of the hydraulic oil flow. Both the electromagnetic reversing valve and the electromagnetic proportional pressure valve adopt existing technologies.

[0036] A more preferred solution is that a rotation operating part 31 is coaxially extended from one end of the rotating shaft 3, the rotation operating part 31 is located outside the main valve body 1, a fixing hole 61 adapted to the rotation operating part 31 is provided at the lower part of the joystick 6, a linkage mechanism 62 is provided between the rotation operating part 31 and the joystick 6 to drive the joystick 6 to swing when the rotating shaft 3 rotates, and a clamping mechanism 63 for clamping the rotation operating part 31 is provided on the joystick 6. The rotation operating part 31 is connected to the joystick 6 through the linkage mechanism 62, and when the rotating shaft 3 rotates, the rotation operating part 31 drives the joystick 6 to swing through the linkage mechanism 62; the clamping mechanism 63 is provided to prevent the rotation operating part 31 from being disengaged from the joystick 6.

[0037] A better solution is that the linkage mechanism 62 includes a flat key 621, a first key groove 622 axially opened on the rotating operating part 31, and a second key groove 623 axially opened on the hole wall of the fixing hole 61. The first key groove 622 and the second key groove 623 are relatively spliced ​​into a key cavity compatible with the flat key 621. The flat key 621 cooperates with the key cavity to realize the linkage between the rotating shaft 3 and the operating lever 6; the clamping mechanism 63 includes two clamping blocks 631 and a fastener 632 that can apply force to the two clamping blocks 631 so that the two clamping blocks 631 clamp the rotating operating part 31. The operating lever 6 is provided with an opening 633 connected to the fixing hole 61 from the bottom to the top. The opening 633 forms two clamping blocks 631 on the part of the operating lever 6 located below the fixing hole 61. The use of the flat key 621 to realize the linkage between the rotating shaft 3 and the operating lever 6 is not only simple in structure, but also avoids the operation trouble and the problem of easy loosening and falling off caused by using screws; an opening 633 is opened on the operating lever 6, so that the parts on both sides of the opening 633 can be squeezed inward under the action of force, and when the fastener 632 is tightened, the two clamping blocks 631 are squeezed inward so that the part of the fixing hole 61 close to the opening 633 is squeezed inward to clamp the rotating operating part 31; the fastener 632 can adopt a matching structure of a screw and a nut.

[0038] A further solution is that a shaft blind cover 9 is fixed on both sides of the main valve body 1, and the axial end of the shaft 3 is movably embedded in the shaft blind cover 9. A sealing structure B for preventing the pressure oil from leaking from the connecting gap is arranged between the shaft blind cover 9 and the side end of the main valve body 1, between the shaft 3 and the shaft blind cover 9, between the front cover 4 and the front end of the main valve body 1, and between the rear cover 5 and the rear end of the main valve body 1. A skeleton oil seal C is arranged between an axial end of the shaft 3 close to the rotating operating part 31 and the shaft blind cover 9 on the same side. The shaft blind cover 9 is arranged to prevent dust and the like from entering the inner cavity of the main valve body 1; since there will inevitably be gaps in the connection between components, in order to prevent the pressure oil from leaking out from these gaps and to prevent external dust, water vapor, etc. from entering the inner cavity of the main valve body 1, the sealing structure B is reasonably installed. The sealing structure B can adopt conventional technical means, such as the matching structure of an annular groove and an O-ring. A fork plate 64 for connecting to the operating handle of the external manual proportional valve is connected to the upper part of the joystick 6. The rotation of the shaft 3 causes the joystick 6 to swing back and forth, and the fork plate 64 swings back and forth with the joystick 6, so that the operating handle of the external manual proportional valve is actuated, thereby realizing the control of the hydraulic motor by the external manual proportional valve.

[0039] In the present invention, it is assumed that the front cover 4 is located in front of the main valve body 1 relative to the main valve body 1 , and the rear cover 5 is located behind the main valve body 1 relative to the main valve body 1 .

[0040] The assembly process of the hydraulic mechanism is as follows: the main valve core 2 is installed on the main valve body 1, the front half 21 of the main valve core 2 is located in the first through hole 11, the rear half 22 of the main valve core 2 is located outside the main valve body 1, one of the spring seats 23, the compression spring 7, and the other spring seat 23 are installed on the rear half 22 of the main valve core 2 in sequence, and the locking nut 24 is screwed on the end, the front cover 4 is installed on the front end of the main valve body 1, and the rear cover 5 is installed on the rear end of the main valve body 1, and the pin body of the push pin 81 is inserted into the first pin hole on the rotating shaft 3. 84, align the second limiting hole 85 with the second pin hole 86, insert the elastic cylindrical pin 82, install the rotating shaft 3 with the driving pin 81 into the second through hole 12 of the main valve body 1, and make the pin head of the driving pin 81 insert into the first limiting hole 83 on the main valve core 2, install the rotating shaft blind cover 9 on the left and right sides of the main valve body 1, because the rotating shaft 3 is embedded in the rotating shaft blind cover 9, the pin head of the driving pin 81 is always located in the first limiting hole 83, install the skeleton oil seal C into one of the rotating shaft blind covers 9, and install the operating lever 6 on the rotating operating part 31.

[0041] The working process of the hydraulic mechanism is as follows: when in use, the pressure oil enters the front oil channel 42, and the pressure oil pushes the main valve core 2 backward to overcome the spring force of the compression spring 7 and move backward, the pin 81 drives the shaft 3 to rotate, the joystick 6 swings backward, the operating handle of the external manual proportional valve is pushed, the pressure oil entering the front oil channel 42 is cancelled, the main valve core 2 returns to the middle position under the spring force of the compression spring 7, and drives the pin 81 and the joystick 6 back to the middle position; conversely, the pressure oil enters the rear oil channel 53, and the pressure oil pushes the main valve core 2 forward to overcome the spring force of the compression spring 7 and move forward, the pin 81 drives the shaft 3 to rotate in the opposite direction, the joystick 6 swings forward, the operating handle of the external manual proportional valve is pushed, the pressure oil entering the rear oil channel 53 is cancelled, the main valve core 2 returns to the middle position under the spring force of the compression spring 7, and drives the pin 81 and the joystick 6 back to the middle position. According to the pressure of the pressure oil, the joystick 6 swings with the linear proportion.

Claims

1. A hydraulic mechanism capable of realizing remote control of an operating handle, characterized in that: It comprises a main valve body, a main valve core which is arranged on the main valve body through front and back, a rotating shaft which is arranged on the main valve body through left and right, a front cover connected to the front end of the main valve body, a rear cover connected to the rear end of the main valve body, and a joystick fixed to one axial end of the rotating shaft, the front half of the main valve core is fixedly connected to the rotating shaft, a compression spring is arranged on the rear half of the main valve core, a front oil chamber is arranged on the front cover, a spring chamber and a rear oil chamber are coaxially arranged on the rear cover, the front oil chamber, the inner chamber of the main valve body, the spring chamber, and the rear oil chamber are connected in sequence, the compression spring is restricted in the spring chamber, the front oil chamber and the rear oil chamber are switched to supply oil by remote control so that the joystick swings forward and backward, and the pressure of the oil supply to the remotely controlled front oil chamber or the rear oil chamber determines the swing angle of the joystick; The main valve body is provided with a first through hole for the main valve core to move forward and backward. When the main valve core is in the middle position, the front half of the main valve core is located in the first through hole. The front oil chamber, the first through hole, the spring chamber, and the rear oil chamber are coaxially connected in sequence. The main valve body is provided with a second through hole for the shaft to rotate. The first through hole is connected to the second through hole to form the inner cavity of the main valve body. The diameter of the front half of the main valve core is larger than that of the rear half, a spring seat is sleeved on the front and rear ends of the rear half of the main valve core, a locking nut is threadedly connected to the rear end of the rear half of the main valve core, the compression spring is limited between the two spring seats, the diameter of the spring cavity is larger than the diameter of the first through hole and the diameter of the rear oil cavity, and the spring seat is adapted to the spring cavity; The front cover is also provided with a front end oil channel connected to the front oil chamber, and the rear cover is also provided with a rear end oil channel connected to the rear oil chamber. The hydraulic mechanism also includes an electromagnetic reversing valve for realizing the oil inlet switching between the front end oil channel and the rear end oil channel, and an electromagnetic proportional pressure valve for realizing the pressure of the oil inlet to the front end oil channel or the rear end oil channel. The electromagnetic reversing valve is controlled by a remote electrical signal to make the joystick swing back and forth, and the electromagnetic proportional pressure valve is controlled by a remote electrical signal to determine the swing angle of the joystick back and forth.

2. A hydraulic mechanism capable of realizing remote control of an operating handle according to claim 1, characterized in that An axis fixing mechanism is arranged between the front half of the main valve core and the rotating shaft, and the axis fixing mechanism comprises a push pin, an elastic cylindrical pin, a first limiting hole radially opened on the front half of the main valve core and matched with the pin head of the push pin, a first pin hole radially opened on the rotating shaft and matched with the pin body of the push pin, a second limiting hole radially opened on the rotating shaft and matched with the elastic cylindrical pin, and a second pin hole radially opened on the pin body of the push pin and matched with the elastic cylindrical pin, the pin body of the push pin is inserted into the first pin hole and the elastic cylindrical pin is aligned and inserted into the second limiting hole and the second pin hole to realize the fixing of the push pin and the rotating shaft, and the pin head of the push pin is inserted into the first limiting hole to realize the fixing of the push pin and the front half of the main valve core.

3. A hydraulic mechanism capable of realizing remote control of an operating handle according to claim 1, characterized in that The first through hole partially overlaps with the second through hole with the first through hole on the top and the second through hole on the bottom. The side wall of the front half of the main valve core is flattened to form an inwardly recessed concave plane, and the concave plane faces the rotating shaft.

4. The hydraulic mechanism capable of realizing remote control of the operating handle according to claim 1, characterized in that A rotating operating part is coaxially extended from one axial end of the rotating shaft, and the rotating operating part is located outside the main valve body. A fixing hole compatible with the rotating operating part is provided at the lower part of the operating lever. A linkage mechanism is provided between the rotating operating part and the operating lever to drive the operating lever to swing when the rotating shaft rotates, and a clamping mechanism is provided on the operating lever to clamp the rotating operating part.

5. A hydraulic mechanism capable of realizing remote control of an operating handle according to claim 4, characterized in that The linkage mechanism includes a flat key, a first keyway axially opened on the rotating operating part, and a second keyway axially opened on the hole wall of the fixing hole. The first keyway and the second keyway are relatively spliced ​​into a key cavity compatible with the flat key. The flat key cooperates with the key cavity to realize the linkage between the rotating shaft and the operating rod; the clamping mechanism includes two clamping blocks and a fastener that can apply force to the two clamping blocks so that the two clamping blocks clamp the rotating operating part. The operating rod is provided with an opening connected to the fixing hole from the bottom to the top, and the opening enables the part of the operating rod located below the fixing hole to form two clamping blocks.

6. A hydraulic mechanism capable of realizing remote control of an operating handle according to claim 5, characterized in that A rotating shaft cover is fixed on both sides of the main valve body, and the axial end of the rotating shaft is movably embedded in the rotating shaft cover. A sealing structure for preventing pressure oil from leaking from the connecting gap is arranged between the rotating shaft cover and the side end of the main valve body, between the rotating shaft and the rotating shaft cover, between the front cover and the front end of the main valve body, and between the rear cover and the rear end of the main valve body. A skeleton oil seal is arranged between an axial end of the rotating shaft close to the rotating operating part and the rotating shaft cover on the same side.

7. The hydraulic mechanism capable of realizing remote control of an operating handle according to claim 1, characterized in that The upper part of the joystick is connected with a fork plate used for connecting with the operating handle of an external manual proportional valve.

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