CN103252639B - High pulling torque automatic fastening device - Google Patents
High pulling torque automatic fastening device Download PDFInfo
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- CN103252639B CN103252639B CN201310144496.5A CN201310144496A CN103252639B CN 103252639 B CN103252639 B CN 103252639B CN 201310144496 A CN201310144496 A CN 201310144496A CN 103252639 B CN103252639 B CN 103252639B
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Abstract
The invention discloses a kind of 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), the oil-out place of described electric hydraulic station (1) is connected with pressure switch (4), the oil-in of pressure switch (4) communicates with the High voltage output oil circuit of the solenoid directional control valve (1.4) in electric hydraulic station (1), and the control mouth of pressure switch (4) is electrically connected with the electromagnet of solenoid directional control valve (1.4) and controls; Described hydraulic spanner (2) is provided with the travel control device that can control oil cylinder stroke.After adopting above structure, accurately bolt can be screwed to position and action is quick, efficiency is high, can realize automation.
Description
Technical field
The present invention relates to the technical field of machine tool, is specifically a kind of high pulling torque automatic fastening device.
Background technology
In bolted on some main equipments, disassembling section, the size of its bolt is comparatively large, usually at more than M100, therefore mainly adopts hydraulic spanner to realize tightening and dismounting of bolt in conjunction with the device of hydraulic power unit.It is normally power with hydraulic pressure, and provide the Power output of high pulling torque, such as peak torque can reach 110000NM.The high pulling torque fastener of prior art comprises the hydraulic power unit and hydraulic spanner that are connected by oil pipe, wherein, hydraulic spanner comprises cylinder component, support and ratchet assembly, cylinder component and ratchet assembly are installed on 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 be communicated with safety valve between, the actuator port of reversal valve is communicated with the oil cylinder in hydraulic spanner respectively by snap joint, on two actuator ports, connects high-pressure overflow valve and low pressure relief valve be respectively simultaneously used for the normal pressure of guarantee system.But there is following shortcoming in the high pulling torque fastener of this structure:
1) bolt ratchet assembly being driven be enclosed within support due to the effect of hydraulic jack or nut rotate, one time stroke realizes bolt or nut rotation angle, after backhaul, second time stroke realizes bolt or nut rotation angle again, go round and begin again, until by bolt or nut screwing clamping or unscrew, but, only lean on the stroke of oil cylinder to control the rotational angle of ratchet assembly, be inaccurate; Further, when tighting a bolt, people can only tightening for judging whether, or push away according to oil cylinder and motionlessly judge whether bolt is tightened, is all inaccurate; Overtighten meeting causes wearing and tearing to bolt and the screwed hole that coordinates with bolt, thus shortens the life-span, and twists not in place, but can cause the generation of security incident;
2) in addition, in order to realize the object of automation, have in prior art and flowmeter is set in the exit of hydraulic pump, Controlling solenoid valve commutation is carried out according to the fuel-displaced flow of hydraulic pump, realizing oil cylinder drives ratchet to move back and forth, but this structure is also imperfect: exist in hydraulic system on the one hand and leak, flowmeter also has error; Also can flow away when reaching the safety value of overflow valve instantaneously a part of hydraulic oil on the other hand, the phenomenon therefore causing the reading of flowmeter not to be inconsistent with actual flow, causes the angular error of accumulation comparatively large, greatly reduce the efficiency of spanner; Be whether this system can not reach required value by automatic decision moment of torsion on the one hand again, bolt is twisted tightly can not cause security incident, and the service time of this device for fastening is longer, and the reading of flowmeter is more inaccurate.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of and accurately can be screwed to position and action is quick, efficiency is high, can realize the automatic device for fastening of high pulling torque of 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 oil-in of pressure switch communicates with the High voltage output oil circuit of the solenoid directional control valve in electric hydraulic station, and the control mouth of pressure switch is electrically connected with the electromagnet of solenoid directional control valve and controls; 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 the oil-in of solenoid directional control valve and Pressure gauge, the two-way actuator port of solenoid directional control valve is communicated with snap joint respectively, and the oil circuit of a wherein road high pressure arranges high-pressure overflow valve, the oil circuit of an other road low pressure arranges low pressure relief valve.Described hydraulic spanner comprises cylinder component, wallboard support, ratchet, ratchet, pawl seat and handwheel, detent slide to be connected in pawl seat and to engage with ratchet, pawl seat is socketed in outside the middle part of ratchet, the two ends of ratchet are rotatably connected on one end of wallboard support, handwheel is fixedly connected on the end face of ratchet, the endoporus of ratchet is the polygonal hole matched with bolt head, the cylinder seat of cylinder component and the other end of wallboard support hinged, piston rod and the pawl seat of cylinder component are hinged, the two-way hydraulic fluid port of electric hydraulic station is communicated with the oil inlet and outlet of cylinder component respectively by oil pipe, the stiff end of described travel control device is arranged on wallboard support, and movable end is positioned on pawl seat.
Described travel control device comprises two proximity switches, arc and vertical plates, and the lower end of vertical plate is fixedly connected with the wallboard support being provided with ratchet one end, and upper end is fixedly connected with arc, and the two ends of arc are separately installed with proximity switch; Described pawl seat have two contact projections, respectively with two proximity switch contact inductions.
The angle of contact head respectively and between the line of ratchet axis of two described proximity switches is 60 degree.
After adopting above structure, the present invention compared with prior art, has following advantage:
1) because pressure switch utilizes the pressure of liquid to open and close the hydra-electric conversion element of electrical contact; when system pressure reaches the setting of pressure switch; send the signal of telecommunication, after making electromagnet action, oil circuit is commutated, therefore; action accurately, rapidly; without the need to artificial judgement, also without the need to whether being pushed away by oil cylinder motionlessly judge whether to tight a bolt, like this; can not cause and twist not tight or be threaded through tight phenomenon, protect the normal service life of bolt.
2) simultaneously, pressure switch, two proximity switches, spanner, pumping plant composition automatic control systems, when reaching setup pressure value, pressure switch triggers electric elements action, automatically automatic mode is exited, spanner quits work, and therefore, accurately can control the situation that puts in place of bolt, the action of hydraulic spanner and the power fuel feeding of electric hydraulic station can be passed through completely, so this device can realize the demand of automation completely, safely, fast.
3) in hydraulic spanner, original position and final position is controlled by two proximity switches in the rotational travel of pawl seat, therefore, accurately control original position and the final position (being set in oil cylinder stroke-5mm to locate) of the piston rod in cylinder component, make stroke each time all within predetermined value, more ensure that accuracy and the high efficiency of bolt tightening degree.
4) in addition, the angle of the contact head of two proximity switches respectively and between the line of ratchet axis is set as 60 degree, in other words, cylinder component each time straight line stroke makes ratchet rotate 60 degree, and this can try one's best again not increase the best angle of hydraulic spanner volume meeting fast screwing down while.
Accompanying drawing explanation
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 in the present invention.
Fig. 4 is the sectional structure schematic diagram of hydraulic spanner in 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, wallboard support; 2.3, handwheel; 2.4, ratchet; 2.5, pawl seat; 2.6, proximity switch; 2.7, contact is protruding; 2.8, arc; 2.9, vertical plate; 2.10, ratchet; 3, oil pipe; 4, pressure switch.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in more detail.
From the structural representation of the automatic device for fastening of high pulling torque of the present invention shown in Fig. 1 ~ Fig. 4, 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 oil-in of pressure switch 4 communicates with the High voltage output oil circuit of the solenoid directional control valve 1.4 in electric hydraulic station 1, and the control mouth of pressure switch 4 is electrically connected with the electromagnet of solenoid directional control valve 1.4 and controls; Described hydraulic spanner 2 is provided with the travel control device that can control oil cylinder stroke.。
From the hydraulic principle schematic diagram of Fig. 2, 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 the oil-in of solenoid directional control valve 1.4 and Pressure gauge 1.3, the two-way actuator port of solenoid directional control valve 1.4 is communicated with snap joint 1.7 respectively, and the oil circuit of a wherein road high pressure arranges high-pressure overflow valve 1.5, the oil circuit of an other road low pressure arranges low pressure relief valve 1.6.
The structural representation of the hydraulic spanner shown in composition graphs 3 and Fig. 4 is 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 to be slidably connected in pawl seat 2.5 and to engage with ratchet 2.4, 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 one 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 matched with bolt head, the cylinder seat of cylinder component 2.1 and the other end of wallboard support 2.2 hinged, piston rod and the pawl seat 2.5 of cylinder component 2.1 are hinged, the two-way hydraulic fluid port of electric hydraulic station 1 is communicated with respectively by the oil inlet and outlet of oil pipe 3 with cylinder component 2.1, the stiff end of described travel control device is arranged on wallboard support 2.2, and movable end is positioned on pawl seat 2.5.
Described travel control device comprises two proximity switches 2.6, arc 2.8 and vertical plate 2.9, the lower end of vertical plate 2.9 is fixedly connected with the wallboard support 2.2 being provided with ratchet 2.4 one end, upper end is fixedly connected with arc 2.8, and the two ends of arc 2.8 are separately installed with proximity switch 2.6.Described pawl seat 2.5 have two contact projections 2.7, respectively with two proximity switch 2.6 contact inductions.
In the present embodiment, the angle of the contact head of two described proximity switches 2.6 respectively and between the line of ratchet 2.4 axis is 60 degree, in other words, the every action stroke of cylinder component 2.1, piston rod will drive pawl seat 2.5 to be rotated counterclockwise 60 degree, equally, also ratchet 2.10 is made to be rotated counterclockwise 60 degree, until a contact projection 2.7 being positioned at outside on pawl seat 2.5 touches the rear stopping of one of them proximity switch 2.6, cylinder component 2.1 starts oil return action, now pawl seat 2.5 drives ratchet 2.10 to turn clockwise, due to the one-way of click, ratchet 2.10 is impelled to slide to the direction away from ratchet 2.4 until depart from the engagement of ratchet 2.4, last oil cylinder backhaul, until a contact projection 2.7 being positioned at inner side on pawl seat 2.5 touches another one proximity switch 2.6 rear oil cylinder stopping action, terminate whole actions of a stroke.Then, then proceed action next time, move in circles, until when the system output pressure in electric hydraulic station 1 reaches the force value that pressure switch 4 presets, stop whole actions of hydraulic spanner 2, complete the rundown process of whole bolts.If unscrewed, otherwise then.
Claims (3)
1. the automatic device for fastening of high pulling torque, 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 oil-in of pressure switch (4) communicates with the High voltage output oil circuit of the solenoid directional control valve (1.4) in electric hydraulic station (1), the control mouth of pressure switch (4) is electrically connected with the electromagnet of solenoid directional control valve (1.4) and controls, described hydraulic spanner (2) is provided with the travel control device that can control oil cylinder stroke, 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 the oil-in of solenoid directional control valve (1.4) and Pressure gauge (1.3), the two-way actuator port of solenoid directional control valve (1.4) is communicated with snap joint (1.7) respectively, and the oil circuit of a wherein road high pressure arranges high-pressure overflow valve (1.5), the oil circuit of an other road low pressure arranges low pressure relief valve (1.6), 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) to be slidably connected in pawl seat (2.5) and to engage with ratchet (2.4), 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 one 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 matched with bolt head, the cylinder seat of cylinder component (2.1) and the other end of wallboard support (2.2) hinged, piston rod and the pawl seat (2.5) of cylinder component (2.1) are hinged, the two-way hydraulic fluid port of electric hydraulic station (1) is communicated with respectively by the oil inlet and outlet of oil pipe (3) with cylinder component (2.1), the stiff end of described travel control device is arranged on wallboard support (2.2), and movable end is positioned on pawl seat (2.5).
2. the automatic device for fastening of high pulling torque according to claim 1, it is characterized in that: described travel control device comprises two proximity switches (2.6), arc (2.8) and vertical plate (2.9), the lower end of vertical plate (2.9) is fixedly connected with the wallboard support (2.2) being provided with ratchet (2.4) one end, upper end is fixedly connected with arc (2.8), and the two ends of arc (2.8) are separately installed with proximity switch (2.6); Described pawl seat (2.5) have two contact projections (2.7), respectively with two proximity switch (2.6) contact inductions.
3. the automatic device for fastening of high pulling torque according to claim 2, is characterized in that: the angle of contact head respectively and between the line of ratchet (2.4) axis of two described proximity switches (2.6) is 60 degree.
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310144496.5A CN103252639B (en) | 2013-04-23 | 2013-04-23 | High pulling torque automatic fastening device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103252639A CN103252639A (en) | 2013-08-21 |
| CN103252639B true CN103252639B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310144496.5A Active CN103252639B (en) | 2013-04-23 | 2013-04-23 | High pulling torque automatic fastening device |
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| Country | Link |
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| CN (1) | CN103252639B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810464A (en) * | 2020-05-22 | 2020-10-23 | 武汉船用机械有限责任公司 | Bolt tightening device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN203209959U (en) * | 2013-04-23 | 2013-09-25 | 宁波欣特机械有限公司 | Automatic large-torque fastening device |
Family Cites Families (4)
| 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 |
| 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 |
-
2013
- 2013-04-23 CN CN201310144496.5A patent/CN103252639B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| CN103252639A (en) | 2013-08-21 |
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