CN103252639A - Large-torque automatic fastening device - Google Patents

Large-torque automatic fastening device Download PDF

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Publication number
CN103252639A
CN103252639A CN2013101444965A CN201310144496A CN103252639A CN 103252639 A CN103252639 A CN 103252639A CN 2013101444965 A CN2013101444965 A CN 2013101444965A CN 201310144496 A CN201310144496 A CN 201310144496A CN 103252639 A CN103252639 A CN 103252639A
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CN
China
Prior art keywords
oil
ratchet
pressure
switch
hydraulic
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CN2013101444965A
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Chinese (zh)
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CN103252639B (en
Inventor
汤关荣
杨自建
王九
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NINGBO SAIVS MACHINERY CO Ltd
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NINGBO SAIVS MACHINERY CO Ltd
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Priority to CN201310144496.5A priority Critical patent/CN103252639B/en
Publication of CN103252639A publication Critical patent/CN103252639A/en
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Publication of CN103252639B publication Critical patent/CN103252639B/en
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Abstract

The invention discloses a large-torque automatic fastening device. The large-torque automatic fastening device comprises a power-driven hydraulic pump station (1) and a hydraulic spanner (2). The power-driven hydraulic pump station (1) is communicated with the hydraulic spanner (2) through an oil pipe (3), a pressure relay (4) is connected at the position of an oil outlet of the power-driven hydraulic pump station (1), an oil inlet of the pressure relay (4) is communicated with a high-pressure output oil path of an electro-magnetic reversing valve (1.4) in the power-driven hydraulic pump station (1), and a control port of the pressure relay (4) is electrically connected with and controls an electric magnet of the electro-magnetic reversing valve (1.4). A travel control device which can control the travel of an oil cylinder is arranged on the hydraulic spanner (2). After the structure is adopted, a bolt can be screwed in place accurately, action is fast, efficiency is high and automation can be realized.

Description

The high pulling torque automatic fastening device
Technical field
The present invention relates to the technical field of machine tool, specifically is a kind of high pulling torque automatic fastening device.
Background technology
In bolted on some main equipments, the disassembling section, the size of its bolt is bigger, and more than M100, therefore the main hydraulic spanner that adopts is realized tightening and dismantling of bolt in conjunction with the device of hydraulic power unit usually.It is power with hydraulic pressure normally, and the power output of high pulling torque is provided, and for example peak torque can reach 110000NM.The high pulling torque fastener of prior art comprises hydraulic power unit and the hydraulic spanner that connects by oil pipe, wherein, hydraulic spanner comprises cylinder component, support and ratchet assembly, cylinder component and ratchet assembly are installed on the support, and cylinder component is connected with ratchet assembly and provides power to ratchet assembly; The hydraulic system of hydraulic power unit comprises hydraulic pump, safety valve, reversal valve, high-pressure overflow valve, low pressure relief valve and snap joint, the oil-out of hydraulic pump is communicated with the oil-in of reversal valve, and between is communicated with safety valve, the actuator port of reversal valve is communicated with oil cylinder in the hydraulic spanner by snap joint respectively, connects high-pressure overflow valve and low pressure relief valve simultaneously respectively and be used for the normal pressure of the system that guarantees on two actuator ports.But there is following shortcoming in the high pulling torque fastener of this structure:
1) because the bolt that the effect of hydraulic jack drives ratchet assembly to be enclosed within on the support or nut rotation, a stroke realizes that bolt or nut rotate an angle, after the backhaul for the second time stroke realize that again bolt or nut rotate an angle, go round and begin again, until with bolt or nut screwing clamping or unscrew, but, only depend on the stroke of oil cylinder to control the rotational angle of ratchet assembly, be inaccurate; And, when tighting a bolt, can only the people tighten for judging whether, perhaps push away according to oil cylinder and motionlessly judge whether bolt is tightened, all be inaccurate; Overtighten meeting reaches the screwed hole that cooperates with bolt to bolt and causes wearing and tearing, thereby shortens the life-span, and stubborn not in place, but can cause the generation of security incident;
2) in addition, in order to realize the purpose of automation, have in the prior art in the exit of hydraulic pump flowmeter is set, control the magnetic valve commutation according to the fuel-displaced flow of hydraulic pump, realize that oil cylinder drives ratchet and moves back and forth, but this structure also is imperfect: exist in the hydraulic system on the one hand and leak, flowmeter also has error; A part of hydraulic oil that when moment reaches the safety value of overflow valve, also can flow away on the other hand, the reading that therefore causes flowmeter and the phenomenon that actual flow is not inconsistent cause the angular error of accumulation bigger, greatly reduce the efficient of spanner; Be that this system can not judge automatically whether moment of torsion has reached required value on the one hand again, bolt is twisted tightly can not cause security incident, and the service time of this device for fastening is more long, and the reading of flowmeter is more inaccurate.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of can accurately be screwed to position and action fast, efficient is high, the automatic device for fastening of high pulling torque that can realize automation.
For solving the problems of the technologies described above, the automatic device for fastening of high pulling torque provided by the invention, comprise electric hydraulic station and hydraulic spanner, described electric hydraulic station is communicated with hydraulic spanner by oil pipe, the oil-out place of described electric hydraulic station is connected with pressure switch, the high pressure output circuit of the solenoid directional control valve in the oil-in of pressure switch and the electric hydraulic station communicates, and the control mouth of pressure switch is electrically connected and controls with the electromagnet of solenoid directional control valve; Described hydraulic spanner is provided with the travel control device that can control oil cylinder stroke.
Described electric hydraulic station also comprises hydraulic pump, safety valve, Pressure gauge, snap joint, high-pressure overflow valve and low pressure relief valve, the oil-out of hydraulic pump is communicated with the oil-in of safety valve and oil-in and the Pressure gauge of solenoid directional control valve, the two-way actuator port of solenoid directional control valve is communicated with snap joint respectively, and wherein on the oil circuit of one road high pressure high-pressure overflow valve is set, on the oil circuit of other one tunnel low pressure low pressure relief valve is set.
Described hydraulic spanner comprises cylinder component, the wallboard support, ratchet, ratchet, pawl seat and handwheel, ratchet is slidingly connected in the pawl seat and with ratchet and meshes, pawl seat is socketed in outside the middle part of ratchet, the two ends of ratchet are rotatably connected on an end of wallboard support, handwheel is fixedly connected on the end face of ratchet, the endoporus of ratchet is the polygonal hole that matches with bolt head, the cylinder seat of cylinder component and the other end of wallboard support are hinged, piston rod and the pawl seat of cylinder component are hinged, and the two-way hydraulic fluid port of electric hydraulic station is communicated with the oil inlet and outlet of cylinder component by oil pipe respectively; The stiff end of described travel control device is installed on the wallboard support, and movable end is positioned on the pawl seat.
Described travel control device comprises two near switch, arc and vertical plate, fixedlys connected with the wallboard support that ratchet one end is installed in the lower end of vertical plate, fixedlys connected with arc in the upper end, and the two ends of arc are separately installed with near switch; Have two contact projectioies on the described pawl seat, respectively with two near the switch contact induction.
Described two near the contact head of switch respectively and the angle between the line of ratchet axis be 60 degree.
After adopting above structure, the present invention compared with prior art has following advantage:
1) because pressure switch is to utilize the pressure of liquid to open and close the hydraulic pressure electric conversion element of electrical contact; when system pressure reaches the setting of pressure switch; send the signal of telecommunication, make the oil circuit commutation after making electromagnet action, therefore; action accurately, rapidly; need not artificial judgement, also need not whether push away motionless judging whether by oil cylinder and tight a bolt, like this; can not cause the phenomenon of twisting not tight or stubborn tension, protect the normal service life of bolt.
2) simultaneously, pressure switch, two are formed automatic control system near switch, spanner, pumping plant, and when reaching setup pressure value, pressure switch triggers the electric elements action, automatically withdraw from automatic mode, spanner quits work, and therefore, can accurately control the situation that puts in place of bolt, fully can be by the action of hydraulic spanner and the power fuel feeding of electric hydraulic station, so this device can be realized the demand of automation fully, safety, quick.
3) in the hydraulic spanner, in the rotational travel of pawl seat, control original position and final position by two near switch, therefore, original position and the final position (being set in oil cylinder stroke-5mm place) of the piston rod in the cylinder component have accurately been controlled, make each time stroke all within predetermined value, guaranteed that more bolt tightens accuracy and the high efficiency of degree.
4) in addition, with two near the contact head of switch respectively and the angle between the line of ratchet axis be set at 60 degree, in other words, cylinder component straight line stroke each time makes ratchet rotation 60 degree, and this is not increase the best angle of hydraulic spanner volume satisfying can try one's best again when tighting a bolt fast.
Description of drawings
Fig. 1 is the structural representation of the automatic device for fastening of high pulling torque of the present invention.
Fig. 2 is the hydraulic principle schematic diagram of the automatic device for fastening of high pulling torque of the present invention.
Fig. 3 is the perspective view of hydraulic spanner among the present invention.
Fig. 4 is the sectional structure schematic diagram of hydraulic spanner among the present invention.
Wherein, 1, electric hydraulic station; 1.1, hydraulic pump; 1.2, safety valve; 1.3, Pressure gauge; 1.4, solenoid directional control valve; 1.5, high-pressure overflow valve; 1.6, low pressure relief valve; 1.7, snap joint; 2, hydraulic spanner; 2.1, cylinder component; 2.2, the wallboard support; 2.3, handwheel; 2.4, ratchet; 2.5, pawl seat; 2.6, near switch; 2.7, the contact projection; 2.8, arc; 2.9, vertical plate; 2.10, ratchet; 3, oil pipe; 4, pressure switch.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done explanation in further detail.
By the structural representation of the automatic device for fastening of high pulling torque of the present invention of Fig. 1~shown in Figure 4 as can be known, it comprises electric hydraulic station 1 and hydraulic spanner 2, described electric hydraulic station 1 is communicated with hydraulic spanner 2 by oil pipe 3, the oil-out place of described electric hydraulic station 1 is connected with pressure switch 4, the high pressure output circuit of the solenoid directional control valve 1.4 in the oil-in of pressure switch 4 and the electric hydraulic station 1 communicates, and the control mouth of pressure switch 4 is electrically connected and controls with the electromagnet of solenoid directional control valve 1.4; Described hydraulic spanner 2 is provided with the travel control device that can control oil cylinder stroke.。
By the hydraulic principle schematic diagram of Fig. 2 as can be known, described electric hydraulic station 1 also comprises hydraulic pump 1.1, safety valve 1.2, Pressure gauge 1.3, snap joint 1.7, high-pressure overflow valve 1.5 and low pressure relief valve 1.6, the oil-out of hydraulic pump 1.1 is communicated with the oil-in of safety valve 1.2 and oil-in and the Pressure gauge 1.3 of solenoid directional control valve 1.4, the two-way actuator port of solenoid directional control valve 1.4 is communicated with snap joint 1.7 respectively, and wherein on the oil circuit of one road high pressure high-pressure overflow valve 1.5 is set, low pressure relief valve 1.6 is set on the oil circuit of other one tunnel low pressure.
In conjunction with the structural representation of Fig. 3 and hydraulic spanner shown in Figure 4 as can be known, described hydraulic spanner 2 comprises cylinder component 2.1, wallboard support 2.2, ratchet 2.4, ratchet 2.10, pawl seat 2.5 and handwheel 2.3, ratchet 2.10 is slidingly connected in the pawl seat 2.5 and with ratchet 2.4 and meshes, pawl seat 2.5 is socketed in outside the middle part of ratchet 2.4, the two ends of ratchet 2.4 are rotatably connected on an end of wallboard support 2.2, handwheel 2.3 is fixedly connected on the end face of ratchet 2.4, the endoporus of ratchet 2.4 is the polygonal hole that matches with bolt head, the cylinder seat of cylinder component 2.1 and the other end of wallboard support 2.2 are hinged, the piston rod of cylinder component 2.1 and pawl seat 2.5 are hinged, and the two-way hydraulic fluid port of electric hydraulic station 1 is communicated with the oil inlet and outlet of cylinder component 2.1 by oil pipe 3 respectively; The stiff end of described travel control device is installed on the wallboard support 2.2, and movable end is positioned on the pawl seat 2.5.
Described travel control device comprises two near switch 2.6, arc 2.8 and vertical plate 2.9, fixedly connected with the wallboard support 2.2 that ratchet 2.4 1 ends are installed in the lower end of vertical plate 2.9, fixedly connected with arc 2.8 in the upper end, the two ends of arc 2.8 are separately installed with near switch 2.6.Have two contact projectioies 2.7 on the described pawl seat 2.5, respectively with two near switch 2.6 contact inductions.
In the present embodiment, described two near the contact head of switch 2.6 respectively and the angle between the line of ratchet 2.4 axis be 60 degree, in other words, stroke of cylinder component 2.1 every actions, piston rod will drive pawl seat 2.5 and be rotated counterclockwise 60 degree, equally, also make ratchet 2.10 be rotated counterclockwise 60 degree, touching one of them until one on the pawl seat 2.5 contact projection 2.7 that is positioned at the outside stops after near switch 2.6, cylinder component 2.1 beginning oil return actions, this moment, pawl seat 2.5 drive ratchets 2.10 turned clockwise, because the one-way of click, impel ratchet 2.10 to sliding up to the engagement that breaks away from ratchet 2.4 away from the direction of ratchet 2.4, last oil cylinder backhaul, on pawl seat 2.5 one is positioned at inboard contact projection 2.7 and touches another one and stop action near switch 2.6 back oil cylinders, finishes whole actions of a stroke.Then, proceed again to move next time, move in circles, when the system's output pressure in electric hydraulic station 1 reaches on the pressure switch 4 predefined force value, stop whole actions of hydraulic spanner 2, finish the rundown process of whole bolts.If unscrew, otherwise then.

Claims (5)

1. high pulling torque automatic fastening device, comprise electric hydraulic station (1) and hydraulic spanner (2), described electric hydraulic station (1) is communicated with hydraulic spanner (2) by oil pipe (3), it is characterized in that: the oil-out place of described electric hydraulic station (1) is connected with pressure switch (4), the high pressure output circuit of the solenoid directional control valve (1.4) in the oil-in of pressure switch (4) and the electric hydraulic station (1) communicates, and the control mouth of pressure switch (4) is electrically connected and controls with the electromagnet of solenoid directional control valve (1.4); Described hydraulic spanner (2) is provided with the travel control device that can control oil cylinder stroke.
2. high pulling torque automatic fastening device according to claim 1, it is characterized in that: described electric hydraulic station (1) also comprises hydraulic pump (1.1), safety valve (1.2), Pressure gauge (1.3), snap joint (1.7), high-pressure overflow valve (1.5) and low pressure relief valve (1.6), the oil-out of hydraulic pump (1.1) is communicated with the oil-in of safety valve (1.2) and oil-in and the Pressure gauge (1.3) of solenoid directional control valve (1.4), the two-way actuator port of solenoid directional control valve (1.4) is communicated with snap joint (1.7) respectively, and high-pressure overflow valve (1.5) wherein is set on the oil circuit of one road high pressure, low pressure relief valve (1.6) is set on the oil circuit of other one tunnel low pressure.
3. high pulling torque automatic fastening device according to claim 1, it is characterized in that: described hydraulic spanner (2) comprises cylinder component (2.1), wallboard support (2.2), ratchet (2.4), ratchet (2.10), pawl seat (2.5) and handwheel (2.3), ratchet (2.10) is slidingly connected in the pawl seat (2.5) and with ratchet (2.4) and meshes, pawl seat (2.5) is socketed in outside the middle part of ratchet (2.4), the two ends of ratchet (2.4) are rotatably connected on an end of wallboard support (2.2), handwheel (2.3) is fixedly connected on the end face of ratchet (2.4), the endoporus of ratchet (2.4) is the polygonal hole that matches with bolt head, the other end of the cylinder seat of cylinder component (2.1) and wallboard support (2.2) is hinged, the piston rod of cylinder component (2.1) and pawl seat (2.5) are hinged, and the two-way hydraulic fluid port of electric hydraulic station (1) is communicated with the oil inlet and outlet of cylinder component (2.1) by oil pipe (3) respectively; The stiff end of described travel control device is installed on the wallboard support (2.2), and movable end is positioned on the pawl seat (2.5).
4. high pulling torque automatic fastening device according to claim 3, it is characterized in that: described travel control device comprises two near switch (2.6), arc (2.8) and vertical plate (2.9), fixedly connected with the wallboard support (2.2) that ratchet (2.4) one ends are installed in the lower end of vertical plate (2.9), fixedly connected with arc (2.8) in the upper end, the two ends of arc (2.8) are separately installed with near switch (2.6); Have two contact projectioies (2.7) on the described pawl seat (2.5), respectively with two near switch (2.6) contact induction.
5. high pulling torque automatic fastening device according to claim 4 is characterized in that: described two near the contact head of switch (2.6) respectively and the angle between the line of ratchet (2.4) axis be 60 degree.
CN201310144496.5A 2013-04-23 2013-04-23 High pulling torque automatic fastening device Active CN103252639B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310144496.5A CN103252639B (en) 2013-04-23 2013-04-23 High pulling torque automatic fastening device

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Application Number Priority Date Filing Date Title
CN201310144496.5A CN103252639B (en) 2013-04-23 2013-04-23 High pulling torque automatic fastening device

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CN103252639B CN103252639B (en) 2016-04-27

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62236636A (en) * 1986-04-08 1987-10-16 Masahiro Aiura Wrench device
JPH02298441A (en) * 1989-05-10 1990-12-10 Hitachi Ltd Screw detachable device
CN2068453U (en) * 1990-04-09 1991-01-02 黄岩市塑料机械厂 Batching moment of torque spanner
JPH03264271A (en) * 1990-03-14 1991-11-25 Hitachi Ltd Torque value control bolt automatic tightening device
CN101265926A (en) * 2008-04-28 2008-09-17 上海电力学院 Hydraulic wrench multifunctional pump station
CN102502409A (en) * 2011-11-08 2012-06-20 中国矿业大学 Horizontal pinned hydraulic system of crawler crane counterweight
CN202348610U (en) * 2011-11-03 2012-07-25 马鞍山科瑞达机械制造有限公司 Pump station for hydraulic wrench
CN202754726U (en) * 2012-05-29 2013-02-27 徐州天龙液压机械有限公司 Jacking hydraulic system of tower crane
CN203209959U (en) * 2013-04-23 2013-09-25 宁波欣特机械有限公司 Automatic large-torque fastening device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62236636A (en) * 1986-04-08 1987-10-16 Masahiro Aiura Wrench device
JPH02298441A (en) * 1989-05-10 1990-12-10 Hitachi Ltd Screw detachable device
JPH03264271A (en) * 1990-03-14 1991-11-25 Hitachi Ltd Torque value control bolt automatic tightening device
CN2068453U (en) * 1990-04-09 1991-01-02 黄岩市塑料机械厂 Batching moment of torque spanner
CN101265926A (en) * 2008-04-28 2008-09-17 上海电力学院 Hydraulic wrench multifunctional pump station
CN202348610U (en) * 2011-11-03 2012-07-25 马鞍山科瑞达机械制造有限公司 Pump station for hydraulic wrench
CN102502409A (en) * 2011-11-08 2012-06-20 中国矿业大学 Horizontal pinned hydraulic system of crawler crane counterweight
CN202754726U (en) * 2012-05-29 2013-02-27 徐州天龙液压机械有限公司 Jacking hydraulic system of tower crane
CN203209959U (en) * 2013-04-23 2013-09-25 宁波欣特机械有限公司 Automatic large-torque fastening device

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