CN221111641U - Hydraulic mechanism and hydraulic pliers - Google Patents

Abstract

The application relates to the field of hydraulic tools, in particular to a hydraulic mechanism and a hydraulic clamp, the hydraulic mechanism comprises a hydraulic component, the hydraulic component comprises an oil cylinder, an installation cavity and a through hole are formed in the oil cylinder, the bottom wall of the installation cavity is communicated with an oil return channel and a pressure relief channel, the side wall of the installation cavity is communicated with an oil outlet channel, the through hole is communicated with the pressure relief channel, an on-off component capable of switching on and off the pressure relief channel is arranged in the through hole, a valve component is slidably arranged in the installation cavity, the valve component can seal the oil return channel, the pressure relief channel and the oil outlet channel, and the oil return action can be stopped in the operation process of the oil return action through the operation cooperation of the valve component and the on-off component so as to meet more use requirements of the hydraulic clamp.

Description

Hydraulic mechanism and hydraulic pliers

Technical Field

The application relates to the field of hydraulic tools, in particular to a hydraulic mechanism and a hydraulic clamp.

Background

The hydraulic pliers are special hydraulic tools which are specially used for crimping cables and wiring terminals in electric power engineering. In the existing hydraulic pliers, after the movable chuck and the fixed chuck are clamped, the movable chuck automatically rolls back, and if the start button is continuously pressed for oil supply, the movable chuck only slows down the roll-back speed until the movable chuck rolls back to the original position; namely: the existing hydraulic pliers cannot drive the movable chuck to feed and compress again in the moving chuck retraction process, the starting button can be pressed down to execute compressing operation only after the movable chuck is completely retracted to the original position, the working mode is single, and when the hydraulic pliers are used frequently, the compressing working efficiency is low.

Disclosure of utility model

The application provides a hydraulic mechanism and hydraulic pliers, which aim to solve the problem that the existing hydraulic pliers are low in single working efficiency in a working mode.

The hydraulic mechanism provided by the application adopts the following technical scheme:

the hydraulic mechanism comprises a hydraulic component, wherein the hydraulic component comprises an oil cylinder, a mounting cavity and a through hole are formed in the oil cylinder, an oil return channel and a pressure relief channel are communicated with the bottom wall of the mounting cavity, an oil outlet channel is communicated with the side wall of the mounting cavity, the through hole is communicated with the pressure relief channel, an on-off component capable of communicating or blocking the pressure relief channel is arranged in the through hole, a valve component is slidably arranged in the mounting cavity, and the valve component can seal the oil return channel, the pressure relief channel and the oil outlet channel; when the valve component seals the oil return channel, the pressure relief channel and the oil outlet channel, the sliding resistance of the valve component is larger than the reflux hydraulic acting force applied to the valve component; when the valve assembly communicates the oil return channel with the mounting cavity, the reflux hydraulic force applied to the valve assembly is greater than the sliding resistance of the valve assembly.

By adopting the technical scheme, when the valve assembly seals the oil return channel, the pressure relief channel and the oil outlet channel, the reflux hydraulic acting force of the reflux hydraulic oil in the oil return channel on the valve assembly is insufficient to push the valve assembly to move, and the hydraulic oil in the oil return channel cannot flow into the mounting cavity at the moment, so that the oil return reset action cannot be carried out;

After the oil return channel is communicated with the installation cavity by increasing the backflow hydraulic pressure or mechanical driving and the like, hydraulic oil in the oil return channel flows into the installation cavity, at the moment, the backflow hydraulic force of the hydraulic oil on the valve component is enough to push the valve component to slide, so that the valve component slides until the oil outlet channel is communicated with the installation cavity, the hydraulic oil flows through the oil return channel, the installation cavity and the oil outlet channel, continuous oil return action can be carried out, the flow rate of the hydraulic oil in the oil return channel flowing into the installation cavity is equal to the flow rate of the hydraulic oil in the installation cavity flowing into the oil outlet channel, the valve component does not move any more, and the on-off component is in a state of blocking the pressure relief channel in the process;

In the continuous oil return action process, the on-off assembly is driven to operate in an electric driving mode and the like, so that the pressure relief channel is communicated, the oil outlet channel is communicated with the side wall of the installation cavity because the pressure relief channel is communicated with the bottom wall of the installation cavity, the oil pressure of hydraulic oil flowing out of the pressure relief channel is relatively higher than the oil pressure flowing out of the oil outlet channel, the hydraulic oil is preferentially discharged from the pressure relief channel, at the moment, the flow rate of the hydraulic oil flowing into the installation cavity in the oil return channel is smaller than the flow rate of the hydraulic oil flowing into the pressure relief channel in the installation cavity, the valve assembly can reset and slide until the oil return channel, the pressure relief channel and the oil outlet channel are all closed, and therefore the ongoing oil return reset action can be stopped;

In conclusion, through the operation of the removal of control valve subassembly and break-make subassembly, according to the operation action of user demand regulation hydraulic mechanism, realize the oil return and stop the action of oil return, increase the working pattern type, satisfy the work demand, improve work efficiency.

It is further preferable that the oil return passage cross section is smaller than the installation cavity cross section in the hydraulic oil flow direction.

Through adopting above-mentioned technical scheme, at the oil return in-process, the velocity of flow of oil return is in steady state, after moving the valve subassembly and making oil return passageway and installation cavity intercommunication, hydraulic oil flows into the installation cavity from oil return passageway, and oil return passageway cross-section is less than the installation cavity cross-section, hydraulic oil is greater than the hydraulic pressure effort of hydraulic oil in the oil return passageway to the valve subassembly to the hydraulic pressure effort of valve subassembly in the installation cavity this moment, hydraulic oil in the installation cavity can promote the valve subassembly to slide under the hydraulic pressure effect this moment, until installation cavity and oil outlet channel intercommunication, need not to exert the effort to the valve subassembly continuously just can reach the effect of lasting oil return, the energy consumption is reduced.

Further preferably, the valve assembly comprises a fixing part fixed in the installation cavity, a sliding part slidably arranged in the installation cavity, and a first elastic piece fixedly connected between the fixing part and the sliding part, wherein a connector is fixedly arranged on the sliding part, and the connector is slidably connected with the fixing part and extends out of the installation cavity.

By adopting the technical scheme, the valve component is divided into the fixed part and the sliding part, the first elastic piece is connected between the fixed part and the sliding part, the communication relation between the mounting cavity and the oil return channel, the pressure relief channel and the oil outlet channel is changed by sliding of the sliding part, the valve component can be prevented from being separated from the mounting cavity by the fixed arrangement of the fixed part, the first elastic piece provides sliding resistance for the valve component, and the sliding part can reset and slide under the action of the first elastic piece after the pressure relief channel is opened, and the oil return channel, the pressure relief channel and the oil outlet channel are closed again, so that the structural reliability is improved; in addition, the connector is fixedly connected with the sliding part, the connector is in sliding connection with the fixing part, stability of the sliding part during sliding can be improved, and the connector extends out of the mounting cavity to facilitate sliding of the sliding part under external mechanical driving control.

Further preferably, the on-off assembly comprises a driving motor fixedly installed on the oil cylinder, a first cam connected to the output end of the driving motor, a first thimble abutting against the outer circumferential surface of the first cam, a sealing piston fixed on the first thimble and slidably arranged in the through hole, a sealing element slidably arranged in the through hole, and a sealing plug fixed at the opening of one side of the through hole, wherein the sealing element is positioned between the sealing piston and the sealing plug, one end of the first thimble, far away from the first cam, abuts against the sealing element, one end of the sealing plug, facing the through hole, is fixedly provided with a second elastic element, and one end of the second elastic element, far away from the sealing plug, abuts against the sealing element.

By adopting the technical scheme, the first cam is driven to rotate by the driving motor and pushes the first thimble to slide, so that the sealing piece is pushed to be communicated with the pressure release channel in a sliding manner, and the sealing piston and the sealing plug can avoid leakage when hydraulic oil passes through the through hole; when reset, the driving motor drives the first cam to overturn, the sealing element resets and slides under the action of the second elastic element, so that the pressure relief channel is blocked again, and the reciprocating sliding of the sealing element is realized by matching the cam structure with the second elastic element, so that the blocking and the communication of the pressure relief channel are realized, the structure is simple, and the disassembly, the assembly and the maintenance are convenient.

It is further preferred that the sidewall of the via is in communication with a normally closed process orifice.

By adopting the technical scheme, the pressure relief channel is conveniently machined by forming the process hole, and the process Kong Changbi avoids leakage caused by the outflow of hydraulic oil from the process hole.

Further preferably, the hydraulic mechanism further comprises an oil pumping assembly, an execution assembly and an oil bag, an oil cavity is formed in the oil cylinder, the execution assembly is slidably arranged in the oil cavity, the oil pumping assembly is used for pumping hydraulic oil in the oil bag into the oil cavity and driving the execution assembly to slide, the oil return channel is communicated between the installation cavity and the oil cavity, and the pressure relief channel and the oil outlet channel are communicated between the installation cavity and the oil bag.

By adopting the technical scheme, the oil pumping assembly, the execution assembly and the oil bag are arranged to be matched with the hydraulic assembly, so that the circulating flow of hydraulic oil among the oil bag, the oil pumping assembly, the oil cavity and the hydraulic assembly is realized, and the execution assembly in the oil cavity is realized to make corresponding operation actions through the action of the hydraulic assembly;

The valve assembly seals the oil return channel, the pressure relief channel and the oil outlet channel at the beginning, the oil pumping assembly pumps hydraulic oil into the oil cavity to realize feeding sliding of the execution assembly, the execution assembly stops after oil pumping is stopped, the execution assembly can stop moving at any time in the feeding process, and at the moment, if the valve assembly is moved and the oil return channel is communicated with the installation cavity, the execution assembly can be retracted;

In the back sliding process of the execution assembly, the pressure release channel of the on-off assembly is communicated, the oil return channel, the pressure release channel and the oil outlet channel are closed again by the valve assembly, at the moment, the oil return action is stopped, the execution assembly stops back, the execution assembly can stop moving at any time in the back process, and at the moment, if the oil pumping mechanism is restarted, the execution assembly can be driven to feed again;

In summary, the execution assembly can stop at any time no matter in the feeding or retreating process, and the operation of the execution assembly can be switched by controlling the valve assembly and the on-off assembly, so that the working modes are enriched, and more working requirements are met.

The application also provides a hydraulic clamp which adopts the following technical scheme:

The hydraulic pliers comprise a mounting shell, a fixed chuck and the hydraulic mechanism, wherein the oil cylinder and the oil bag are fixed on the mounting shell, the fixed chuck is fixed on the oil cylinder, the execution assembly is fixedly provided with a movable chuck which is matched with the fixed chuck, and the mounting shell is provided with a driving button; the driving button operates by pressing the oil applying component for a long time, and the driving button operates by pressing the on-off component.

Through adopting above-mentioned technical scheme, the installation shell is convenient for artifical the control and can improve the protection to hydraulic mechanism, through long-time pressing drive button drive oil-applying subassembly operation, realizes executing assembly's feeding, through touch the drive button drive break-make subassembly operation, realizes the switching of oil return action, improves controllability and human-computer interaction, enriches working mode, satisfies the work demand.

It is further preferred that the actuating assembly includes a moving piston slidably disposed within the oil chamber, the moving collet being secured to the moving piston.

By adopting the technical scheme, the movable chuck can be synchronously driven to move by driving the movable piston, so that the synchronism and the controllability are improved.

It is further preferable that the movable piston is fixedly connected with a connecting rod, the movable chuck is fixed on the connecting rod, a fixed plate is fixedly arranged on the oil cylinder, and a third elastic piece is connected between the fixed plate and the movable piston.

Through adopting above-mentioned technical scheme, remove chuck and fixed chuck and compress tightly the back subassembly of beating oil and continue to beat oil, remove the piston and still can feed the slip, and remove the chuck and then no longer remove, third elastic component compresses this moment, the hydraulic oil in the oil pocket continues to increase, until the pressure of backward flow hydraulic oil overcomes the sliding resistance of valve subassembly and promotes valve subassembly and remove, can realize automatic oil return this moment, avoid removing the chuck and the fixed chuck between the pressure too tight damage that causes, improve security and degree of automation.

It is further preferable that a reset button is arranged on the mounting shell, a plectrum is connected to the valve component, the reset button is abutted with the plectrum, and the plectrum is driven to deform and drive the valve component to move by pressing the reset button.

By adopting the technical scheme, pressing the reset button drives the shifting sheet to deform and drives the valve component to move, thereby realizing active oil return control and improving the controllability.

In summary, the present application includes at least one of the following beneficial technical effects:

1. According to the application, the oil return action can be stopped in the oil return action operation process by the operation coordination of the valve component and the on-off component, so that more use requirements can be met;

2. In the further arrangement of the application, no matter in the feeding or the backspacing process of the execution assembly, the action can be stopped at any time, the oiling assembly, the valve assembly and the on-off assembly are controlled to operate cooperatively, so that the execution assembly can continue feeding operation after stopping feeding in the feeding process, backspacing reset after stopping feeding in the feeding process, feeding operation after stopping backspacing in the backspacing process and backspacing reset after stopping backspacing in the backspacing process, the working modes are rich, corresponding adjustment control is carried out according to the use requirement, and the working efficiency is improved;

3. In the further arrangement of the application, the driving button, the reset button and the plectrum are arranged, so that the man-machine interaction and the operability are improved.

Drawings

FIG. 1 is a schematic perspective view of a hydraulic clamp;

FIG. 2 is a schematic view of the structure of FIG. 1 after concealing the mounting shell;

FIG. 3 is a schematic view of the hydraulic mechanism connected to the moving jaw;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a schematic perspective view of a cylinder;

FIG. 6 is a cross-sectional view of the oil return passage in the oil cylinder;

FIG. 7 is a cross-sectional view of the relief passage and process orifice in the cylinder;

FIG. 8 is a cross-sectional view of the oil outlet passage in the oil cylinder;

FIG. 9 is a schematic perspective view of an on-off assembly;

FIG. 10 is a cross-sectional view of the cylinder at the through hole;

FIG. 11 is a schematic perspective view of a valve assembly;

FIG. 12 is a schematic perspective view of an actuator assembly and a moving jaw;

FIG. 13 is a cross-sectional view of the oil cylinder at the oil feed passage;

FIG. 14 is a schematic perspective view of an oiling assembly;

Fig. 15 is a schematic perspective view of another view of the oiling assembly.

Reference numerals illustrate: 1. a mounting shell; 2. a single chip microcomputer; 4. a drive button; 5. a reset button; 6. fixing a chuck; 7. a hydraulic mechanism; 71. an execution component; 711. moving the piston; 712. a connecting rod; 713. a third elastic member; 714. a fixing plate; 72. a hydraulic assembly; 7201. an oil cylinder; 7202. an oil chamber; 7203. a mounting hole; 7204. a through hole; 7205. an oil inlet; 7206. an oil inlet passage; 7207. beating an oil cavity; 7208. a unidirectional channel; 7209. a mounting cavity; 7210. an oil return passage; 7211. a first connection port; 7212. a second connection port; 7213. an oil outlet channel; 7214. a pressure relief channel; 7215. a mounting groove; 7216. a process hole; 7217. a plug; 73. a valve assembly; 731. a limiting piece; 732. a connector; 733. a fixing part; 734. a first elastic member; 735. a sliding part; 736. a seal head; 74. an oil bag; 75. an on-off assembly; 751. a driving motor; 752. a first cam; 753. a first thimble; 754. a seal; 755. a second elastic member; 756. a sealing plug; 757. a sealing piston; 76. an oiling assembly; 761. an oiling motor; 762. a transmission; 763. a mounting base; 764. a reciprocating piston; 765. a fourth elastic member; 766. a second cam; 767. a second thimble; 77. a first one-way valve; 78. a second one-way valve; 8. moving the chuck; 10. a pulling piece.

Detailed Description

The present application will be described in further detail with reference to fig. 1 to 15.

The embodiment of the application discloses a hydraulic clamp, which is shown in fig. 1 and 2, and comprises a mounting shell 1, a singlechip 2, a driving button 4, a reset button 5, a fixed chuck 6, a movable chuck 8, a pulling sheet 10 and a hydraulic mechanism 7.

Specifically, fixed chuck 6 and hydraulic mechanism 7 fixed mounting are on installation shell 1, remove chuck 8 fixed at hydraulic mechanism 7's flexible end and slidable mounting are on installation shell 1, remove chuck 8 and fixed chuck 6 looks adaptation, driving button 4 and reset button 5 are installed on installation shell 1, plectrum 10 is built-in installation shell 1, singlechip 2 has still been built-in installation shell 1, singlechip 2 and driving button 4, hydraulic mechanism 7 electric connection, press driving button 4, and control hydraulic mechanism 7 through singlechip 2 received signal and carry out corresponding action, reset button 5 and plectrum 10 butt, plectrum 10 is connected with hydraulic mechanism 7, make plectrum 10 deformation through pressing down reset button 5, thereby control hydraulic mechanism 7 and reset action.

In the embodiment, the driving button 4 is pressed for a long time to drive the hydraulic mechanism 7 to operate, so that the movable chuck 8 moves towards the side close to the fixed chuck 6, and after the driving button 4 is released, the movable chuck 8 stops feeding, so that the movable chuck 8 can stop at any time in the feeding process; at the moment, the driving button 4 is continuously pressed for a long time, so that the moving chuck 8 can be continuously driven to feed, or the reset button 5 is pressed, the shifting sheet 10 is deformed and the hydraulic mechanism 7 is controlled, so that the moving chuck 8 is retracted and reset;

In the back-off reset process after the movable clamp 8 finishes the compaction work or in the back-off reset process of the movable clamp 8 in the middle of the feeding process, the movable clamp 8 can stop back after the driving button 4 is touched, so that the movable clamp 8 can stop at any time in the back-off process; when the driving button 4 is pressed for a long time, the movable chuck 8 can be driven to feed again, or the reset button 5 is pressed, so that the movable chuck 8 continues to retract and reset, and the retracting speed of the movable chuck 8 is only slowed down when the driving button 4 is pressed for a long time in the retracting and resetting process.

Referring to fig. 3 and 4, for the hydraulic mechanism 7, the hydraulic mechanism includes an actuating assembly 71, a hydraulic assembly 72, a valve assembly 73, an oil bag 74, an on-off assembly 75 and an oil pumping assembly 76.

Specifically, referring to fig. 5 to 9, the hydraulic assembly 72 includes an oil cylinder 7201, a mounting cavity 7209, a through hole 7204 and an oil cavity 7202 are formed in the oil cylinder 7201, an oil return channel 7210 and a pressure release channel 7214 are formed in the bottom wall of the mounting cavity 7209 in a communicating manner, an oil outlet channel 7213 is formed in the side wall of the mounting cavity 7209 in a communicating manner, the through hole 7204 is communicated with the pressure release channel 7214, an on-off assembly 75 capable of communicating or blocking the pressure release channel 7214 is formed in the through hole 7204, a valve assembly 73 is slidably mounted in the mounting cavity 7209, the valve assembly 73 can seal the oil return channel 7210, the pressure release channel 7214 and the oil outlet channel 7213, an executing assembly 71 is slidably arranged in the oil cavity 7202 and is connected with the shifting plate 10, the oil beating assembly 76 is used for driving hydraulic oil in the oil cavity 7202 of the oil bag 74 and driving the sliding of the executing assembly 71, the oil return channel 7210 is communicated between the mounting cavity 7209 and the oil cavity 7202, the pressure release channel 7214 and the pressure release channel 7213 is communicated between the mounting cavity 7209 and the oil bag 74, and the oil bag 7202, and the oil return channel 7209 is formed in the oil bag 7202 and the pressure release channel 7213 is closed loop is formed by the oil bags 7202, the oil and the oil assembly 76 and the oil pressure release assembly 76 and the oil assembly 7202 and the oil channels 7202.

In this embodiment, the oil cylinder 7201 and the oil bag 74 are fixed on the installation shell 1, the moving chuck 8 is fixed on the executing component 71, the oiling component 76 is electrically connected with the single chip microcomputer 2, and the driving button 4 controls the oiling component 76 to operate on time, the on-off component 75 is electrically connected with the single chip microcomputer 2, and the on-off component 75 operates when the driving button 4 is in point contact, so that the pressure release channel 7214 is communicated or blocked, the driving button 4 is in point contact once, the on-off component 75 operates once to communicate with the pressure release channel 7214 after the driving button 4 is in point contact once, and operates once again after a certain time is delayed, so that the pressure release channel 7214 is blocked, and the time delay function is controlled by the single chip microcomputer 2.

In addition, when the hydraulic pliers just run, the driving button 4 is required to be touched, the pressure relief channel 7214 is firstly initialized for pressure relief, and then the driving button 4 is driven for long-time pressing.

When the valve assembly 73 seals the oil return channel 7210, the pressure relief channel 7214 and the oil outlet channel 7213, the sliding resistance of the valve assembly 73 is greater than the oil return hydraulic force applied to the valve assembly 73; when the valve assembly 73 communicates the oil return passage 7210 with the installation chamber 7209, the valve assembly 73 receives a backflow hydraulic force greater than the sliding resistance of the valve assembly 73, and it should be noted that the backflow hydraulic force herein refers to: after the movable chuck 8 is pressed against the fixed chuck 6, the oil pressure in the oil chamber 7202.

In this embodiment, a first connection port 7211 and a second connection port 7212 are formed in the bottom wall of the installation cavity 7209, the first connection port 7211 is communicated with the oil return channel 7210, the second connection port 7212 is communicated with the pressure relief channel 7214, and by setting the first connection port 7211 and the second connection port 7212, backflow hydraulic oil in the oil return channel 7210 can be ensured to be introduced from the bottom of the installation cavity 7209, and hydraulic oil in the installation cavity 7209 flows from the bottom of the installation cavity 7209 to the pressure relief channel 7214;

The oil outlet channel 7213 is arranged on the side wall of the installation cavity 7209, namely the height of the oil outlet channel 7213 is higher than that of the pressure relief channel 7214, so that the pressure of hydraulic oil in the installation cavity 7209 when the hydraulic oil flows out of the oil outlet channel 7213 is smaller than that when the hydraulic oil flows out of the pressure relief channel 7214, when the oil outlet channel 7213 and the pressure relief channel 7214 are both opened, hydraulic oil in the installation cavity 7209 flows out of the pressure relief channel 7214 preferentially, in the embodiment, a process hole 7216 is communicated with the side wall of the through hole 7204, the through hole 7204 cuts off the pressure relief channel 7214 from the middle of the pressure relief channel 7214, the pressure relief channels 7214 are arranged at two sides of the through hole 7204 in a staggered mode, the process hole 7216 is convenient to process the pressure relief channel 7214, the process hole 7216 is plugged by a plug 7217 in a normally closed state in the using process of the hydraulic mechanism 7, and the hydraulic oil is prevented from flowing out of the process hole 7216.

In a further arrangement, the oil return channel 7210 has a cross-section smaller than the cross-section of the mounting chamber 7209 in the direction of flow of hydraulic oil. In the process of backflow, the flow rate of the hydraulic oil is stable, at the moment, the larger the cross section of the flow of the hydraulic oil is, the larger the pressure of the hydraulic oil is, when the valve assembly 73 blocks the oil return channel 7210, the hydraulic pressure in the oil return channel 7210 is insufficient to overcome the sliding resistance of the valve assembly 73 to push the valve assembly 73 to slide, at the moment, backflow is blocked, the execution assembly 71 in the oil cavity 7202 cannot be retracted and reset, and therefore the effect that the execution assembly 71 stops at any time is achieved; when the valve assembly 73 is deformed and pulled by the pulling piece 10, the oil return channel 7210 is communicated with the mounting cavity 7209, at this time, the hydraulic action in the mounting cavity 7209 is enough to push the valve assembly 73 to slide until the mounting cavity 7209 is communicated with the oil outlet channel 7213, at this time, hydraulic oil in the mounting cavity 7209 flows back into the oil bag 74 through the oil outlet channel 7213, so that the executing assembly 71 in the oil cavity 7202 can be retracted and reset.

For the on-off assembly 75, referring to fig. 10, the on-off assembly comprises a driving motor 751 fixedly installed on an oil cylinder 7201 and controlled by a single chip microcomputer 2, a first cam 752 connected to the output end of the driving motor 751, a first thimble 753 abutted against the outer peripheral surface of the first cam 752, a sealing piston 757 fixed on the first thimble 753 and slidably arranged in a through hole 7204, a sealing element 754 slidably arranged in the through hole 7204, and a sealing plug 756 fixed at the opening of one side of the through hole 7204, wherein the sealing element 754 is located between the sealing piston 757 and the sealing plug 756, one end of the first thimble 753, far away from the first cam 752, is abutted against the sealing element 754, one end of the sealing plug 756, facing the through hole 7204, is fixedly provided with a second elastic element 755, and one end of the second elastic element 755, far away from the sealing plug 756, is abutted against the sealing element 754.

Specifically, the driving motor 751 and the first cam 752 are mounted outside the through hole 7204, the driving button 4 is used for touching the driving motor 751 once to run twice, the driving motor 751 drives the first cam 752 to rotate 180 ° every time, when the first cam 752 rotates in two states, the first thimble 753 is respectively abutted to the long shaft end and the short shaft end of the first cam 752, the oil cylinder 7201 is provided with the mounting groove 7215 for mounting the driving motor 751, and stability of the driving motor 751 during running is improved.

In this embodiment, the sealing member 754 adopts a steel ball, and when the first thimble 753 collides with the long shaft end of the first cam 752, the sealing member 754 communicates the pressure release channel 7214, and at this time, the second elastic member 755 is in a compressed state; the relief channel 7214 is blocked when the first spike 753 abuts the stub end of the first cam 752.

For the valve assembly 73, referring to fig. 11, the valve assembly includes a fixing portion 733 fixed in the mounting cavity 7209, a sliding portion 735 slidably disposed in the mounting cavity 7209, and a first elastic member 734 fixedly connected between the fixing portion 733 and the sliding portion 735, wherein a connecting head 732 is fixedly disposed on the sliding portion 735, and the connecting head 732 is slidably connected with the fixing portion 733 and extends out of the mounting cavity 7209.

In this embodiment, the connection head 732 is connected to the pulling piece 10, the pulling piece 10 is deformed to drive the connection head 732 to move, so as to drive the sliding portion 735 to move and enable the oil return channel 7210 to be communicated with the installation cavity 7209, the pressure of hydraulic oil in the installation cavity 7209 needs to overcome the pressure of the first elastic member 734 to push the sliding portion 735 to move until the oil outlet channel 7213 is communicated with the installation cavity 7209, the pressure of hydraulic oil in the installation cavity 7209 is balanced with the pressure of the first elastic member 734, when the pressure release channel 7214 is opened, the pressure in the installation cavity 7209 is insufficient to overcome the pressure of the first elastic member 734, and at this time, the sliding portion 735 slides under the action of the elastic force of the first elastic member 734 and blocks the oil return channel 7210 again.

In further setting, in order to improve the stability of the valve assembly 73, set up the mounting hole 7203 on hydro-cylinder 7201, peg graft or threaded connection has locating part 731 in the mounting hole 7203, and locating part 731 is used for supporting fixed part 733, is equipped with head 736 at the fixed head 736 of sliding part 735 bottom, and head 736 can slide in first connecting port 7211, improves the leakproofness to oil return channel 7210.

With respect to the actuating assembly 71, referring to fig. 12, the actuating assembly includes a movable piston 711 slidably disposed in an oil chamber 7202, a connecting rod 712 fixed to the movable piston 711, a movable chuck 8 fixed to the connecting rod 712, and a fixing plate 714 fixedly disposed on an oil cylinder 7201, wherein a third elastic member 713 is connected between the fixing plate 714 and the movable piston 711.

In this embodiment, the moving piston 711 and the third elastic member 713 are both located inside the oil cavity 7202, when hydraulic oil pushes the moving piston 711 to slide, the moving chuck 8 is driven to move, and meanwhile, the third elastic member 713 is compressed, when the moving chuck 8 is compressed with the fixed chuck 6, the hydraulic oil pressure in the oil cavity 7202 is insufficient to push the valve assembly 73 to move, at this moment, the oiling assembly 76 continues to operate to pressurize the oil cavity 7202 until the valve assembly 73 is pushed to move for oil return, at this moment, the executing assembly 71 drives the moving chuck 8 to retract, so that excessive compression force between the moving chuck 8 and the fixed chuck 6 is avoided, automatic retraction can be realized, and the degree of automation is improved.

In addition, referring to fig. 13, an oil pumping chamber 7207 is formed in the oil cylinder 7201, an oil inlet channel 7206 is communicated between the oil pumping chamber 7207 and the oil bag 74, an oil inlet 7205 is formed on one side, close to the oil bag 74, of the oil inlet channel 7206, a first one-way valve 77 allowing hydraulic oil to flow from the oil bag 74 into the oil inlet channel 7206 is fixed in the oil inlet 7205, a one-way channel 7208 is communicated between the oil pumping chamber 7207 and the oil cavity 7202, a second one-way valve 78 allowing hydraulic oil to flow from the oil pumping chamber 7207 to the oil cavity 7202 is fixed in the one-way channel 7208, and the oil pumping assembly 76 is used for sucking hydraulic oil in the oil bag 74 into the oil pumping chamber 7207 and driving hydraulic oil in the oil cavity 7202.

For the oiling component 76, referring to fig. 14 and 15, the oiling motor 761 is electrically connected with the singlechip 2, the transmission 762 is connected to the output end of the oiling motor 761, the second cam 766 is fixed at the output end of the transmission 762, the second thimble 767 is abutted to the outer circumferential surface of the second cam 766, the reciprocating piston 764 is fixed on the second thimble 767, the fourth elastic piece 765 is fixed between the reciprocating piston 764 and the wall of the oiling cavity 7207, the oil cylinder 7201 is fixedly provided with a mounting seat 763 for supporting and mounting the second cam 766, and the oiling motor 761 and the transmission 762 are fixed on the inner side of the mounting shell 1.

In the present embodiment, the reciprocating piston 764 is driven by the oiling motor 761 to slide reciprocally in the oiling chamber 7207, so that the hydraulic oil in the oil bag 74 is driven into the oil chamber 7202, and feeding of the actuator 71 is achieved.

The implementation principle of the hydraulic pliers provided by the application is as follows:

Initially, the on-off assembly 75 blocks the pressure relief channel 7214 and the valve assembly 73 blocks the oil return channel 7210, the oil outlet channel 7213 and the pressure relief channel 7214, the actuating assembly 71 and the moving jaw 8 being retracted to the extreme positions.

Firstly, the point touch driving button 4 operates the on-off assembly 75 to perform pressure relief initialization on the pressure relief channel 7214, after the on-off assembly 75 re-seals the pressure relief channel 7214, the driving button 4 is pressed for a long time to drive the oil pumping assembly 76 to operate, oil is pumped into the oil cavity 7202 and the executing assembly 71 and the moving chuck 8 are driven to move until the moving chuck 8 is clamped with the fixed chuck 6, so that a cable and a wiring terminal can be in pressure connection, and in the process, the oil pressure in the oil return channel 7210 is smaller than the sliding resistance of the valve assembly 73;

Secondly, continuously pressing the driving button 4 for a long time, continuously pressurizing the oil supply cavity 7202, increasing the oil pressure in the oil return channel 7210 until overcoming the sliding resistance of the valve assembly 73 and pushing the valve assembly 73 to move so as to realize oil return action, and then retracting the execution assembly 71 and the movable chuck 8;

When the moving chuck 8 is required to stop backing, the driving button 4 is touched to drive the on-off assembly 75 to operate so as to enable the pressure relief channel 7214 to be communicated, the pressure in the mounting cavity 7209 is relieved, hydraulic oil is preferentially discharged from the pressure relief channel 7214, the valve assembly 73 resets and slides until the oil return channel 7210 is blocked again, and the backing of the executing assembly 71 and the moving chuck 8 is stopped;

after the movable clamp 8 and the executing assembly 71 stop backing, the crimped cable and the connecting terminal can be taken down, a new cable and a new connecting terminal can be reinstalled, the movable clamp 8 can be fed again by pressing the driving button 4 for a long time, the new cable and the new connecting terminal are crimped, the movable clamp 8 does not need to be fed after being completely returned to the initial state, the backing time and the backing distance of the movable clamp 8 are reduced, and the production efficiency is improved;

After the work is finished, the driving button 4 is not touched any more in the retraction process of the movable chuck 8 until the movable chuck 8 is retracted and reset, or the reset button 5 is pressed for a long time, and the valve assembly 73 is driven to move through the pulling sheet 10, so that the movable chuck 8 is retracted and reset.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. The hydraulic mechanism is characterized by comprising a hydraulic component (72), wherein the hydraulic component (72) comprises an oil cylinder (7201), a mounting cavity (7209) and a through hole (7204) are formed in the oil cylinder (7201), an oil return channel (7210) and a pressure relief channel (7214) are communicated with the bottom wall of the mounting cavity (7209), an oil outlet channel (7213) is communicated with the side wall of the mounting cavity (7209), the through hole (7204) is communicated with the pressure relief channel (7214), an on-off component (75) capable of communicating or blocking the pressure relief channel (7214) is arranged in the through hole (7204), a valve component (73) is arranged in the mounting cavity (7209) in a sliding mode, and the valve component (73) can seal the oil return channel (7210), the pressure relief channel (7214) and the oil outlet channel (7213). When the valve assembly (73) closes the oil return channel (7210), the pressure relief channel (7214) and the oil outlet channel (7213), the sliding resistance of the valve assembly (73) is larger than the backflow hydraulic force applied by the valve assembly (73); when the valve assembly (73) communicates the oil return passage (7210) with the installation chamber (7209), the valve assembly (73) receives a return hydraulic force greater than the sliding resistance of the valve assembly (73).

2. The hydraulic machine according to claim 1, characterized in that the oil return channel (7210) has a smaller cross-section than the mounting chamber (7209) in the direction of flow of the hydraulic oil.

3. The hydraulic mechanism according to claim 1, wherein the valve assembly (73) comprises a fixing portion (733) fixed in the mounting cavity (7209), a sliding portion (735) slidably disposed in the mounting cavity (7209), and a first elastic member (734) fixedly connected between the fixing portion (733) and the sliding portion (735), a connecting head (732) is fixedly disposed on the sliding portion (735), and the connecting head (732) is slidably connected with the fixing portion (733) and extends out of the mounting cavity (7209).

4. The hydraulic mechanism according to claim 1, wherein the on-off assembly (75) comprises a driving motor (751) fixedly mounted on the oil cylinder (7201), a first cam (752) connected to an output end of the driving motor (751), a first thimble (753) abutted against an outer circumferential surface of the first cam (752), a sealing piston (757) fixedly mounted on the first thimble (753) and slidingly mounted in the through hole (7204), a sealing piece (754) slidingly mounted in the through hole (7204) and a sealing plug (756) fixedly mounted at an opening at one side of the through hole (7204), the sealing piece (754) is located between the sealing piston (757) and the sealing plug (756), one end of the sealing plug (756) far away from the first cam (752) is abutted against the sealing piece (754), one end of the sealing plug (756) far from the through hole (7204) is fixedly provided with a second elastic piece (755), and the other end of the sealing plug (756) is far away from the sealing piece (754).

5. The hydraulic mechanism of claim 1, wherein the through-hole (7204) side wall is in communication with a normally closed process hole (7216).

6. The hydraulic mechanism according to claim 1, further comprising an oil pumping assembly (76), an execution assembly (71) and an oil bag (74), wherein an oil cavity (7202) is formed in the oil cylinder (7201), the execution assembly (71) is slidably arranged in the oil cavity (7202), the oil pumping assembly (76) is used for pumping hydraulic oil in the oil bag (74) into the oil cavity (7202) and driving sliding of the execution assembly (71), the oil return channel (7210) is communicated between the installation cavity (7209) and the oil cavity (7202), and the pressure relief channel (7214) and the oil outlet channel (7213) are communicated between the installation cavity (7209) and the oil bag (74).

7. The hydraulic pliers are characterized by comprising a mounting shell (1), a fixed chuck (6) and the hydraulic mechanism according to claim 6, wherein the oil cylinder (7201) and the oil bag (74) are fixed on the mounting shell (1), the fixed chuck (6) is fixed on the oil cylinder (7201), the actuating component (71) is fixedly provided with a movable chuck (8) matched with the fixed chuck (6), and the mounting shell (1) is provided with a driving button (4); the oil spraying assembly (76) operates when the driving button (4) is pressed for a long time, and the on-off assembly (75) operates when the driving button (4) is touched.

8. Hydraulic clamp according to claim 7, characterized in that the actuating assembly (71) comprises a mobile piston (711) slidingly arranged in the oil chamber (7202), the mobile collet (8) being fixed on the mobile piston (711).

9. The hydraulic clamp according to claim 8, wherein a connecting rod (712) is fixedly connected to the movable piston (711), the movable clamp head (8) is fixed to the connecting rod (712), a fixing plate (714) is fixedly arranged on the oil cylinder (7201), and a third elastic member (713) is connected between the fixing plate (714) and the movable piston (711).

10. The hydraulic pliers according to claim 7, wherein a reset button (5) is arranged on the mounting shell (1), a shifting piece (10) is connected to the valve assembly (73), the reset button (5) is abutted against the shifting piece (10), and the shifting piece (10) is deformed and the valve assembly (73) is driven to move by pressing the reset button (5).