CN103072124A - Electric hydraulic tool - Google Patents
Electric hydraulic tool Download PDFInfo
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- CN103072124A CN103072124A CN2012105784285A CN201210578428A CN103072124A CN 103072124 A CN103072124 A CN 103072124A CN 2012105784285 A CN2012105784285 A CN 2012105784285A CN 201210578428 A CN201210578428 A CN 201210578428A CN 103072124 A CN103072124 A CN 103072124A
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Abstract
The invention provides an electric hydraulic tool, which belongs to the technical field of machinery and is used for solving a problem that an oil cylinder of the existing electric hydraulic tool does not have a pressure maintaining function. The electric hydraulic tool comprises a body and a hydraulic working end which is formed on the body, wherein an oil cylinder and an oil storage cavity are arranged in the body; the oil cylinder and the oil storage cavity are communicated by an oil path; a pressurizing mechanism for pressing power oil in the oil storage cavity into the oil cylinder is further arranged on the body; the hydraulic working end is arranged in the oil cylinder; an oil leaking hole communicating the oil storage cavity with the oil cylinder is formed in the body; a switch assembly for enabling the pressurizing mechanism to operate when being started is further arranged on the body; and a choke plug piece for closing the oil leaking hole is further arranged between the switch assembly and the oil leaking hole when the switch assembly is switched on. The oil cylinder of the electric hydraulic tool disclosed by the invention has the pressure retaining function, and is convenient and safe to use.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of hydraulic tool, particularly a kind of electric hydaulic instrument.
Background technology
The electric hydaulic instrument comprises that electric hydraulic cable tongs, electric hydaulic are cut and expands pincers, electric hydaulic Press Plier etc.The electric hydaulic instrument generally comprises motor, shoe cream room, hydraulic pump, hydraulic cylinder, switch module, control valve, is provided with back-moving spring and piston rod in the hydraulic cylinder, and the outer end of piston rod is fixed with the working end.The electric hydaulic instrument rotates by the driven by motor hydraulic pump when work, is pressed into the pressure oil in the shoe cream room in the hydraulic cylinder and promotes the hydraulic end to make it be in the state of work.When needs quit work the hydraulic end, switch module was closed, and motor is quit work, and the draining hole was opened again, and return to pressure oil in the shoe cream room this moment under the effect of back-moving spring.
A kind of electric hydraulic fastener for pipe fittings [the application number: 00208320.5 that openly proposes such as the Chinese patent literature data; Granted publication number: CN2415873Y], comprise working head and supercharging device, the main body of working head is the clamp support, has gathering sill in the clamp support, and rolling wheel support is installed in the gathering sill slidably, an end of rolling wheel support connects a pair roller; Roller cooperates with the application of force inclined-plane of clamp handle tail end inboard, clamp is connected with the clamp support by the dowel hole on the joint cover on the caliper, clamp bolster, supercharging device comprises motor, travelling gear, the cam follower mechanism that connects successively, the plunger type pressurizing cylinder, the plunger type pressurizing cylinder connects rolling wheel support.But, this electric hydraulic fastener for pipe fittings by motor rotate and reverse realize the clamping that clamps and unclamp, motor is in the state of work always when clamping, and can not realize allowing the function of oil cylinder pressurize, have certain danger during use, brought inconvenience to use.
For this situation, people have recognized this deficiency, and carry out improvement, the hand-held extruder [application number: 201210054222.2 of a kind of electric operation that openly proposes such as the Chinese patent literature data; Granted publication number: CN102528743A], comprise standing part and motion parts, wherein, motion parts moves with respect to standing part by a hydraulic piston that moves in hydraulic cylinder and can be by the back-moving spring correcting action, should also be provided with pressure sensor by hand-held extruder, this pressure sensor detects the hydraulic medium pressure in the hydraulic cylinder and determines the position of piston by pressure sensor.This extruder is when work, pressure, the time when workpiece is pushed in pressure sensitive changes into signal and storage, when follow-up work, induction and microcontroller control hydraulic cylinder works by pressure sensor, make the piston Quick holding part by short by switch, at the repeated presses switch workpiece is pushed, after the extruding, trip switch gets final product.But owing to there not being the function of pressurize, when extruding, need to repeatedly press button, bring inconvenience to use.
Summary of the invention
The objective of the invention is to have the problems referred to above for existing technology, proposed a kind of electric hydaulic instrument that has pressure holding function and be convenient to one-handed performance.
Purpose of the present invention can realize by following technical proposal: a kind of electric hydaulic instrument, comprise body and the hydraulic end that is positioned on the body, have oil cylinder and shoe cream room in the described body, link by oil circuit between described oil cylinder and the shoe cream room, also have on the above-mentioned body and the power oil in the shoe cream room can be pressed into in-oil cylinder pressing mechanism, above-mentioned hydraulic end is positioned at oil cylinder, it is characterized in that, has the draining hole that shoe cream room and oil cylinder are linked on the described body, also have the switch module that can make the action of above-mentioned pressing mechanism when its unlatching on the described body, have between described switch module and the draining hole when the switch module unlatching can be with the plug spare of draining bore closure.
This hydraulic end is connected mutually with the piston rod of oil cylinder, is provided with spring between the cylinder body of oil cylinder and the piston rod, under the effect of spring force, makes piston rod have all the time the trend of past oil cylinder medial movement.The electric hydaulic instrument is when work, and the operating switch assembly can make first plug spare with the shutoff of draining hole, makes pressing mechanism work again, power oil is pressed in the cavity of oil cylinder, and the piston rod that promotes oil cylinder makes the hydraulic end be in the state of work.When needs kept in-oil cylinder pressure, the trip switch assembly quit work pressing mechanism, stop to be pressed into power oil in oil cylinder, and plug spare made the shutoff of draining hole keep constant pressure in the oil cylinder at this moment.When needs stopped the work of hydraulic pressure working end, this moment is the trip switch assembly again, and plug spare is separated from the draining hole, and the draining hole is opened, and piston rod drives the hydraulic end and resets under the effect of spring, and in-oil cylinder power oil is got back in the shoe cream room.The motor that pressing mechanism also adopts plunger displacement pump and can drive plunger displacement pump work.By adopting above-mentioned mode, be convenient to singlehanded to this electric hydaulic instrument clamp, pressurize, the operation of unclamping, improved the security of work.As another kind of situation, the electric hydaulic instrument is when work, the opening switch assembly, make plug spare with the shutoff of draining hole, make simultaneously pressing mechanism work, power oil in the shoe cream room is pressed in the oil cylinder, and the piston rod that promotes oil cylinder moves, make the work of hydraulic end, make the electric hydaulic instrument be in the state of clamping, when the hydraulic end is quit work, the trip switch assembly, this moment, plug spare separated from the draining hole, the draining hole is opened, pressing mechanism quits work simultaneously, and piston rod drives the hydraulic end and resets under the effect of spring, and in-oil cylinder power oil is got back in the shoe cream room.
In above-mentioned electric hydaulic instrument, described switch module comprises the switch that is connected on the described body and the handle that is hinged on the described body, described handle can be resisted against on the described switch after its hinged place swings, and described switch is connected between described pressing mechanism and the power supply by wire.When opening pressing mechanism, by pressing handle, handle is rotated and be resisted against on the switch, with motor and the power connection of pressing mechanism, realize the work of pressing mechanism, have comparatively easily advantage of operation.
In above-mentioned electric hydaulic instrument, described switch module comprises the sensor that is connected on the described body and the handle that is hinged on the described body, described handle can be resisted against on the described sensor after its hinged place swings, and described sensor links by circuit and above-mentioned pressing mechanism.When opening pressing mechanism, by pressing handle, handle is rotated and be resisted against on the sensor, with motor and the power connection of pressing mechanism, realize the work of pressing mechanism, have advantages of that operation is reliable and simple in structure.
In above-mentioned electric hydaulic instrument, described plug spare comprises the press section of protruding on push rod and the handle, have spring between described push rod and the described body and under the elastic force effect of described spring described push rod the inner have the trend that breaks away from above-mentioned draining hole, described press section can overcome the elastic force of described spring and press down described push rod outer end after described switch module is opened, and makes described push rod the inner with the hole shutoff of described draining.The press section can overcome spring force and presses down the push rod outer end after switch module is opened, and make push rod the inner with the shutoff of draining hole, again by opening pressing mechanism, realize the work of hydraulic end, when closing pressing mechanism, the trip switch assembly, under the effect of spring force, push rod breaks away from the draining hole, and having advantages of can one-handed performance, improves the security of using.
In above-mentioned electric hydaulic instrument, described plug spare also comprises a tubular Connection Block, described Connection Block is threaded with described body, and described push rod is positioned at described Connection Block, and the two ends of described spring act on respectively on described push rod and the described Connection Block.By the Connection Block that is threaded mutually with body is set, push rod can be movably connected in the Connection Block, and the two ends of spring act on respectively on push rod and the Connection Block, have advantages of simple in structure, easy for installation.
In above-mentioned electric hydaulic instrument, described Connection Block inboard has the gear rank of protrusion, the two ends of described spring are pushed up respectively and are pressed on described gear rank and the described push rod outer end, the two ends that also have keep-spring and described keep-spring in the described Connection Block are pushed up respectively and are pressed in described gear rank and described push rod is inner, described spring is in stress under the elastic force effect of described keep-spring, and the elastic force effect by spring and keep-spring makes the inner described draining hole that breaks away from of described push rod.
Not during duty, keep-spring is in pressured state makes push rod break away from the draining hole and the outer end by push rod acts on elastic force on the spring, because the elastic modelling quantity of spring is greater than the elastic modelling quantity of keep-spring, so deformation does not occur spring.The outer end of pushing push rod after the switch module unlatching overcomes the elastic force of keep-spring and promotes push rod moves toward place, draining hole, with the shutoff of draining hole, and the while extrusion spring; When quitting work, trip switch under the elastic force effect of spring, resets push rod and compresses keep-spring to make the draining hole be in the state of opening.Spring and keep-spring are set, make push rod break away from the draining hole, can reset accurately, and can make highly sensitive that push rod moves, be convenient to opening and closing the draining hole.
In above-mentioned electric hydaulic instrument, has sealing ring between described push rod and the Connection Block.Push rod and Connection Block are provided with sealing ring, also are provided with sealing ring between Connection Block and the body simultaneously, can prevent the leakage of power oil.
In above-mentioned electric hydaulic instrument, described push rod outer end is fixed with baffle plate, and the press section of described handle is resisted against on the described baffle plate.The push rod outer end is fixed with baffle plate, and with spring location and press section with force transmission to push rod, have advantages of that reliable operation, service life are long.
As another scheme, in above-mentioned electric hydaulic instrument, described plug spare comprises push rod and protrudes from the press section of handle both sides, the location division, described location division is resisted against on the described body, described press section and described push rod outer end over against, have spring between described push rod and the body and have the trend in the described draining of disengaging hole in elastic force effect lower push rod the inner of spring, described press section can overcome described spring force and presses down described push rod after described switch module is opened, and makes described push rod the inner with the hole shutoff of described draining.When not working, break away from the draining hole in the inner of the effect lower push rod of spring force, the location division is resisted against on the body under the effect of spring force simultaneously; When opening switch, the elastic force of pressing the press section and making push rod overcome spring makes push rod shutoff draining hole; When closing switch, unclamp the press section, under the effect of spring force, push rod resets and with the shutoff of draining hole, have simple in structure, use comparatively easily advantage.
In above-mentioned electric hydaulic instrument, has the pulse overflow valve in the cylinder body of described oil cylinder, described pulse overflow valve links by circuit and above-mentioned pressing mechanism, and can make described pressing mechanism stop action by circuit after described pulse overflow valve action.By the pulse overflow valve is set in cylinder body; when the pressure in the cylinder body reaches the maximum pressure value of setting of this overflow valve; the pulse overflow valve carries out overload protection, and produces a pulse and quit work by circuit control pressing mechanism, realizes the function of the pressurize of oil cylinder.As another program, a pressure sensor is set in the body of rod of oil cylinder, when in-oil cylinder pressure reached setting value, pressure sensor sent a signal to circuit and pressing mechanism is quit work.
In above-mentioned electric hydaulic instrument, the entrance point of described oil circuit and the port of export all have check valve, by described check valve power oil are entered in the described oil cylinder by described shoe cream room.Make power oil enter oil cylinder from shoe cream room all the time by check valve is set, prevent that power oil from refluxing, and has advantages of that pressurize is effective.
Compared with prior art, this electric hydaulic instrument has the following advantages:
1, plug spare is opened or shutoff draining hole by arranging, and can carry out pressurize or pressure release to in-oil cylinder pressure oil comparatively easily, this electric hydaulic instrument is used comparatively convenient;
2, the keying by a handle and push rod gauge tap under the elastic force effect of spring is set and push rod be to the switching in draining hole, be convenient to singlehanded to this electric hydaulic instrument clamp, pressurize, the operation of unclamping, improved the security of work;
3, by the pulse overflow valve is set in-oil cylinder oil pressure is carried out overload protection, when in-oil cylinder pressure reaches the maximum of setting, the pulse overflow valve produces a pulse and quits work by circuit control pressing mechanism, realizes the function of the pressurize of oil cylinder, has advantages of that use is safer;
4, make power oil enter oil cylinder from shoe cream room all the time by check valve is set, prevent that power oil from refluxing, and has advantages of that pressurize is effective.
Description of drawings
Fig. 1 is the perspective view of this electric hydaulic instrument.
Fig. 2 is the part sectional structure schematic diagram of this electric hydaulic instrument.
Fig. 3 is another sectional structure schematic diagram of this electric hydaulic instrument.
Fig. 4 is that the pulse overflow valve of this electric hydaulic instrument is installed cross-sectional schematic.
Among the figure, 1, body; 2, hydraulic end; 3, oil cylinder; 4, shoe cream room; 5, pressing mechanism; 5a, plunger displacement pump; 5b, motor; 6, draining hole; 7, switch module; 7a, switch; 7b, handle; 7b1, press section; 8, plug spare; 8a, push rod; 8b, Connection Block; 8b1, gear rank; 9, spring; 10, keep-spring; 11, baffle plate; 12, pulse overflow valve.
The specific embodiment
Below be specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As shown in Figures 1 to 4, a kind of electric hydaulic instrument, comprise body 1 and the hydraulic end 2 that is positioned on the body 1, have oil cylinder 3 and shoe cream room 4 in the body 1, link by oil circuit between oil cylinder 3 and the shoe cream room 4, also has the pressing mechanism 5 that the power oil in the shoe cream room 4 can be pressed in the oil cylinder 3 on the body 1, the motor 5b that pressing mechanism 5 adopts plunger displacement pump 5a and can drive plunger displacement pump 5a work.Hydraulic end 2 is positioned at that oil cylinder 3 and its are inner to be the piston of oil cylinder 3.Has the draining hole 6 that shoe cream room 4 and oil cylinder 3 are linked on the body 1, also has the switch module 7 that can make motor 5b action when its unlatching on the body 1, switch module 7 comprises the switch 7a that is connected on the body 1 and the handle 7b that is hinged on the body 1, handle 7b can be resisted against on the switch 7a after its hinged place swings, and switch 7a is connected between motor 5b and the power supply by wire.As another kind of scheme, switch 7a available sensors substitutes, and sensor links by circuit and pressing mechanism 5.Plunger displacement pump 5a can adopt the disclosed a kind of variable displacement plunger displacement pump [application number 201220146314.9 of Chinese patent literature data; Granted publication number: CN202612062U], also can adopt other hydraulic pump.
Have plug spare 8 between switch module 7 and the draining hole 6, plug spare 8 comprises a tubular Connection Block 8b, and Connection Block 8b is threaded with body 1, and Connection Block 8b inboard has the gear rank 8b1 of protrusion.Be equipped with push rod 8a in the cavity of Connection Block 8b, plug spare 8 also comprises the upper press section 7b1 that protrudes of handle 7b, and push rod 8a outer end is connected with baffle plate 11, and the press section 7b1 of handle 7b is resisted against a side of baffle plate 11.Also be provided with spring 9 in the cavity of Connection Block 8b, an end of spring 9 acts on the baffle plate 11, and the other end of spring 9 is resisted against on the gear rank 8b1.Also has keep-spring 10 in the Connection Block 8b, it is inner that the opposite side and the push rod 8a that are pressed in gear rank 8b1 are pushed up respectively in the two ends of keep-spring 10, elastic force effect lower spring 9 at keep-spring 10 is in stress, elastic force effect by spring 9 and keep-spring 10 makes the inner draining hole 6 that breaks away from of push rod 8a, press section 7b1 can overcome the elastic force of spring 9 and press down push rod 8a outer end after switch module 7 is opened, and makes push rod 8a the inner with 6 shutoff of draining hole.Be provided with sealing ring between push rod 8a and the Connection Block 8b, also be provided with sealing ring between Connection Block 8b and the body 1 simultaneously, prevent the leakage of power oil.
Have pulse overflow valve 12 in the cylinder body of oil cylinder 3, pulse overflow valve 12 links by the motor 5b of circuit and pressing mechanism 5, can make the motor 5b of pressing mechanism 5 stop action by circuit after 12 actions of pulse overflow valve.The entrance point of oil circuit and the port of export all have check valve, by check valve power oil are entered in the described oil cylinder 3 by shoe cream room 4.Make power oil enter oil cylinder 3 from shoe cream room 4 all the time by check valve is set, prevent that power oil from refluxing, and has advantages of that pressurize is effective.
When not working, keep-spring 10 is in pressured state makes push rod 8a break away from draining hole 6 and the outer end by push rod 8a acts on elastic force on the spring 9, because the elastic modelling quantity of spring 9 is greater than the elastic modelling quantity of keep-spring 10, so deformation do not occur in spring 9, makes draining hole 6 be in the state of opening.The electric hydaulic instrument is in when work, presses handle 7b and makes press section 7b1 overcome the elastic force of spring 9 and press down push rod 8a outer end, and make push rod 8a the inner with 6 shutoff of draining hole.Continue to press handle 7b; handle 7b rotates and is resisted against on the switch 7a; motor 5b and power connection with pressing mechanism 5; make plunger displacement pump 5a work, power oil is pressed in the cavity of oil cylinder 3, the piston rod that promotes oil cylinder 3 makes hydraulic end 2 be in the state of work; when the pressure of the power oil in the oil cylinder 3 reaches the setting value of maximum; pulse overflow valve 12 is opened also and is carried out overload protection, and produces a pulse and by circuit plunger displacement pump 5a is quit work, and realizes the function of the pressurize of oil cylinder 3.As another program, a pressure sensor is set in the body of rod of oil cylinder 3, when the pressure in the oil cylinder 3 reached setting value, pressure sensor sent a signal to circuit and pressing mechanism 5 is quit work.
When the pressure in the needs maintenance oil cylinder 3, release handle 7b disconnects switch 7a a little, and plunger displacement pump 5a is quit work, and stop to be pressed into power oil in oil cylinder 3, and plug spare 8 makes the constant pressure of oil cylinder 3 interior maintenances still with 6 shutoff of draining hole at this moment.
When needs stop the work of hydraulic pressure working end 2, trip switch 7a under the elastic force effect of spring 9, resets push rod 8a and compresses keep-spring 10 to make draining hole 6 be in the state of opening, power oil in the oil cylinder 3 is in shoe cream room 4 is got back in draining hole 6, and hydraulic end 2 quits work.Spring 9 and keep-spring 10 are set, make push rod 8a break away from draining hole 6, can reset accurately, and can make highly sensitive that push rod 8a moves, be convenient to opening and closing draining hole 6.
By adopting above-mentioned mode, be convenient to singlehanded to this electric hydaulic instrument clamp, pressurize, the operation of unclamping, improved the security of work.As another kind of situation, the electric hydaulic instrument is when work, opening switch assembly 7, make plug spare 8 with 6 shutoff of draining hole, make simultaneously pressing mechanism 5 work, the power oil in the shoe cream room 4 is pressed in the oil cylinder 3, and the piston rod of promotion oil cylinder 3 moves, make 2 work of hydraulic end, make the electric hydaulic instrument be in the state of clamping.When hydraulic end 2 is quit work, trip switch assembly 7,6 separation from the draining hole of plug spare 8 this moment, draining hole 6 is opened, pressing mechanism 5 quits work simultaneously, and piston rod drives hydraulic end 2 and resets under the effect of spring 9, and the power oil in the oil cylinder 3 is got back in the shoe cream room 4.
As another scheme, plug spare 8 comprises push rod 8a and protrudes from press section 7b1, the location division of handle 7b both sides, the location division is resisted against on the body 1, press section 7b1 and push rod 8a outer end over against, has spring 9 between push rod 8a and the body 1, have the trend that breaks away from draining hole 6 in elastic force effect lower push rod 8a the inner of spring 9, press section 7b1 can overcome spring 9 elastic force and presses down push rod 8a after switch module 7 is opened, and makes push rod 8a the inner with 6 shutoff of described draining hole.When not working, break away from draining hole 6 in the inner of the effect push rod 8a of spring 9 elastic force, be resisted against on the body 1 in location division under the effect of spring 9 elastic force simultaneously; When opening switch 7a, the elastic force of pressing press section 7b1 and making push rod 8a overcome spring 9 makes push rod 8a shutoff draining hole 6; When closing switch 7a, unclamp press section 7b1, under the effect of spring 9 elastic force, push rod 8a resets and with 6 shutoff of draining hole, have simple in structure, use comparatively easily advantage.
Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has more used the terms such as body 1, hydraulic end 2, oil cylinder 3, shoe cream room 4, pressing mechanism 5, plunger displacement pump 5a, motor 5b, draining hole 6, switch module 7, switch 7a, handle 7b, press section 7b1, plug spare 8, push rod 8a, Connection Block 8b, gear rank 8b1, spring 9, keep-spring 10, baffle plate 11, pulse overflow valve 12, do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present invention; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (10)
1. electric hydaulic instrument, comprise body (1) and be positioned at hydraulic end (2) on the body (1), have oil cylinder (3) and shoe cream room (4) in the described body (1), link by oil circuit between described oil cylinder (3) and the shoe cream room (4), also has the pressing mechanism (5) that the power oil in the shoe cream room (4) can be pressed in the oil cylinder (3) on the above-mentioned body (1), above-mentioned hydraulic end (2) is positioned at oil cylinder (3), it is characterized in that, has the draining hole (6) that shoe cream room (4) and oil cylinder (3) are linked on the described body (1), also have the switch module (7) that can make above-mentioned pressing mechanism (5) action when its unlatching on the described body (1), have the plug spare (8) that draining hole (6) can be closed when switch module (7) unlatching between described switch module (7) and draining hole (6).
2. electric hydaulic instrument according to claim 1, it is characterized in that, described switch module (7) comprises the switch (7a) that is connected on the described body (1) and is hinged on handle (7b) on the described body (1), described handle (7b) can be resisted against on the described switch (7a) after its hinged place swings, and described switch (7a) is connected between described pressing mechanism (5) and the power supply by wire.
3. electric hydaulic instrument according to claim 1, it is characterized in that, described switch module (7) comprises the sensor that is connected on the described body (1) and the handle (7b) that is hinged on the described body (1), described handle (7b) can be resisted against on the described sensor after its hinged place swings, and described sensor links by circuit and above-mentioned pressing mechanism (5).
4. according to claim 1 and 2 or 3 described electric hydaulic instruments, it is characterized in that, described plug spare (8) comprises push rod (8a) and the upper press section (7b1) of protruding of handle (7b), have spring (9) between described push rod (8a) and the described body (1) and under the elastic force effect of described spring (9) described push rod (8a) the inner have the trend that breaks away from above-mentioned draining hole (6), described press section (7b1) can overcome the elastic force of described spring (9) and press down described push rod (8a) outer end after described switch module (7) is opened, and makes described push rod (8a) inner with described draining hole (6) shutoff.
5. electric hydaulic instrument according to claim 4, it is characterized in that, described plug spare (8) also comprises a tubular Connection Block (8b), described Connection Block (8b) is threaded with described body (1), described push rod (8a) is positioned at described Connection Block (8b), and the two ends of described spring (9) act on respectively on described push rod (8a) and the described Connection Block (8b).
6. electric hydaulic instrument according to claim 5, it is characterized in that, described Connection Block (8b) inboard has the gear rank (8b1) of protrusion, the two ends of described spring (9) are pushed up respectively and are pressed on described gear rank (8b1) and described push rod (8a) outer end, the two ends that also have keep-spring (10) and described keep-spring (10) in the described Connection Block (8b) are pushed up respectively and are pressed in described gear rank (8b1) and described push rod (8a) the inner, described spring (9) is in stress under the elastic force effect of described keep-spring (10), and the elastic force effect by spring (9) and keep-spring (10) makes the inner described draining hole (6) that breaks away from of described push rod (8a).
7. electric hydaulic instrument according to claim 4 is characterized in that, described push rod (8a) outer end is connected with baffle plate (11), and the press section (7b1) of described handle (7b) is resisted against on the described baffle plate (11).
8. according to claim 1 and 2 or 3 described electric hydaulic instruments, it is characterized in that, described plug spare (8) comprises push rod (8a) and protrudes from the press section (7b1) of handle (7b) both sides, the location division, described location division is resisted against on the described body (1), described press section (7b1) and described push rod (8a) outer end over against, have spring (9) between described push rod (8a) and the body (1) and have the trend in disengaging described draining hole (6) in elastic force effect lower push rod (8a) the inner of spring (9), described press section (7b1) can overcome described spring (9) elastic force and presses down described push rod (8a) after described switch module (7) is opened, and makes described push rod (8a) the inner with described draining hole (6) shutoff.
9. according to claim 1 and 2 or 3 described electric hydaulic instruments, it is characterized in that, has pulse overflow valve (12) in the cylinder body of described oil cylinder (3), described pulse overflow valve (12) links by circuit and above-mentioned pressing mechanism (5), and can make described pressing mechanism (5) stop action by circuit after described pulse overflow valve (12) action.
10. according to claim 1 and 2 or 3 described electric hydaulic instruments, it is characterized in that, the entrance point of described oil circuit and the port of export all have check valve, by described check valve power oil are entered in the described oil cylinder (3) by described shoe cream room (4).
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| CN201210578428.5A CN103072124B (en) | 2012-12-27 | 2012-12-27 | A kind of Electric hydraulic tool |
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| CN201210578428.5A CN103072124B (en) | 2012-12-27 | 2012-12-27 | A kind of Electric hydraulic tool |
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| TWI717112B (en) * | 2019-11-19 | 2021-01-21 | 科頡工業股份有限公司 | Piston pump and clamping device with the piston pump |
| CN112901474A (en) * | 2019-11-19 | 2021-06-04 | 科颉工业股份有限公司 | Piston pump and clamping device with same |
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| CN105555483B (en) * | 2013-09-30 | 2017-04-26 | 株式会社泉精器制作所 | Power unit and electric tool |
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| CN105922203A (en) * | 2016-06-21 | 2016-09-07 | 陈瑞峰 | Handheld hydraulic tool |
| CN105922203B (en) * | 2016-06-21 | 2018-04-10 | 陈瑞峰 | A kind of hand-held hydraulic tools |
| CN106194871A (en) * | 2016-08-26 | 2016-12-07 | 玉环县现代工具有限公司 | The oil piping system of a kind of hydraulic tongs and oil return method thereof |
| CN108213559A (en) * | 2016-12-09 | 2018-06-29 | 塞母布雷有限公司 | For the work head and related hydraulic compression or cutting tool of compression or cutting tool |
| CN109268334A (en) * | 2018-11-20 | 2019-01-25 | 台州巨力工具有限公司 | A kind of check valve and hydraulic tool for hydraulic tool |
| TWI717112B (en) * | 2019-11-19 | 2021-01-21 | 科頡工業股份有限公司 | Piston pump and clamping device with the piston pump |
| CN112901474A (en) * | 2019-11-19 | 2021-06-04 | 科颉工业股份有限公司 | Piston pump and clamping device with same |
| CN111872243A (en) * | 2020-07-27 | 2020-11-03 | 昆山盛世伟图电子科技有限公司 | Intelligent control hydraulic tool |
| CN111872243B (en) * | 2020-07-27 | 2022-04-01 | 昆山盛世伟图电子科技有限公司 | Intelligent control hydraulic tool |
| CN112112706A (en) * | 2020-09-29 | 2020-12-22 | 中国航发动力股份有限公司 | Oil drainage device and method for sealing valve |
| CN112112706B (en) * | 2020-09-29 | 2021-08-17 | 中国航发动力股份有限公司 | Oil drainage device and method for sealing valve |
| CN114192675A (en) * | 2020-10-19 | 2022-03-18 | 台州巨力工具股份有限公司 | Ring pressure mould and pipeline crimping tool |
| CN114542993A (en) * | 2022-03-15 | 2022-05-27 | 成都理工大学 | Manual-automatic dual-purpose full-pressure anti-blocking pressure measuring device |
| CN114542993B (en) * | 2022-03-15 | 2023-01-06 | 成都理工大学 | Manual-automatic dual-purpose full-pressure anti-blocking pressure measuring device |
| US11759937B1 (en) | 2022-08-31 | 2023-09-19 | Kudos Mechanical Co., Ltd. | Automatic oil return structure for piston pump |
| DE102022131012B3 (en) | 2022-08-31 | 2024-02-15 | Kudos Mechanical Co., Ltd. | AUTOMATIC OIL RETURN STRUCTURE FOR PISTON PUMPS |
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Address after: 317608 Taizhou Juli Tools Co., Ltd., Xuanmen Industrial City, Lupu Town, Huanzhou City, Zhejiang Province Patentee after: Taizhou Juli Tools Co., Ltd. Address before: 317608 Xuanmen Industrial City, Lupu Town, Yuhuan County, Taizhou City, Zhejiang Province Patentee before: Taizhou Juli Tool Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: An electric hydraulic tool Effective date of registration: 20210610 Granted publication date: 20151118 Pledgee: Industrial Commercial Bank of China Ltd. Yuhuan branch Pledgor: TAIZHOU JULI TOOLS Co.,Ltd. Registration number: Y2021330000549 |