CN202507047U - High-precision intelligent spanner for track fastener bolt - Google Patents
High-precision intelligent spanner for track fastener bolt Download PDFInfo
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- CN202507047U CN202507047U CN2011205021059U CN201120502105U CN202507047U CN 202507047 U CN202507047 U CN 202507047U CN 2011205021059 U CN2011205021059 U CN 2011205021059U CN 201120502105 U CN201120502105 U CN 201120502105U CN 202507047 U CN202507047 U CN 202507047U
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- precision intelligent
- hydraulic motor
- rail clip
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Abstract
The utility model relates to a high-precision intelligent spanner for a track fastener bolt. According to the high-precision intelligent spanner, a power system is arranged on a frame and transfers driving power to a hydraulic motor through an oil pump and a control valve assembly; the frame is further provided with a working system comprising two groups of vertical working devices which comprise bolt sleeves which are coaxially connected with one another and hydraulic motors driving the bolt sleeves to rotate; and a torque sensor is connected between each bolt sleeve and each hydraulic motor in series and is connected with a torque measurement controller, and the torque sensor is used for transmitting torque states to the torque measurement controller so as to control torque output states of the hydraulic motor. During a screwing operation, when an instant torque value detected by the torque sensor is equal to a preset torque value, the hydraulic motor stops rotating; and when the torque of the bolt detected by the torque sensor is over the preset value, the working devices reversely unscrew and disassemble the bolt and then screw the bolt to enable the torque value to reach the preset value. The high-precision intelligent spanner disclosed by the utility model has a simple and reliable structure, the two groups of working devices can independently or synchronously work without direct influence.
Description
Technical field
The utility model relates to railroad track and lays the device with maintenance, particularly a kind ofly is used for the rail clip bolt high-precision intelligent spanner that operation was screwed, loosened to Line for Passenger Transportation and high speed railway track fastening bolt.
Background technology
The operation of screwing, loosen of rail clip bolt is requisite work in railroad track laying, existing line overhaul and the maintenance operation; Need a large amount of special-purpose machineries that are suitable for to replace heavy hand labor; The more important thing is that the elastic bar fastener that makes track keeps buckle press accurately regularly; Keep the buckle press of rail left and right sides fastener balanced, finally guarantee the traffic safety of railway track.
The rail clip track wrench equipment that uses at the construction of railways operation field at present mainly contains following several kinds:
1. single head mechanical type impact wrench.
The dynamical system tool impact mode that adopts this structure spanner realizes the moment of torsion output of track wrench, respectively operation is screwed, loosened to the fastening bolt of the rail left and right sides with a cover impingement sleeve.The main deficiency that this structure spanner exists is: (1) is difficult to accurately control the moment of torsion of screwing of sleeve, and the change operation person of sleeve operation torque can't learn; (2) can not accurately adjust the moment of torsion of screwing after the impingement sleeve wearing and tearing; (3) fastening bolt of the rail left and right sides can only be screwed successively, and the buckle press of bolt fastener is unbalanced, causes the rail both sides to receive offset loading force; (4) impulsive force of bolt collar is more serious to the damage of nut; (5) the rail left and right sides fastener during operation, need lift the rear portion fuselage and cross over rail successively, has increased operator's labour intensity.
2. double end mechanical type impact wrench (centre-to-centre spacing is non-adjustable).
This structure spanner also is to adopt dynamical system tool impact mode to realize the moment of torsion output of track wrench.Two output shafts of the power of engine through transfer gear box drive two cover impact type sleeves respectively, can screw to the fastening bolt of rail both sides simultaneously or loosen operation.Therefore than single head mechanical type impact wrench, operating efficiency is higher, and operator's labour intensity is less.But still there is tangible deficiency in this structure spanner: (1) is difficult to accurately control the moment of torsion of screwing of sleeve, and the change operation person of sleeve operation torque can't learn; (2) can not accurately adjust the moment of torsion of screwing after the impingement sleeve wearing and tearing; (3) because the centre-to-centre spacing of left and right sides impingement sleeve is fixed, can only be applicable to the rail clip operation of same type.Simultaneously,, can only adopt " universal joint " driven type bolt collar, reduce the accuracy of the moment of torsion of screwing for adapting to the deviation of fastening bolt centre-to-centre spacing.
3. single head fluid pressure type torque wrench.
This structure adopts hydraulic motor as the power that drives bolt collar, and operation is screwed, loosened to bolt collar contacting piece bolt under the static pressure of hydraulic motor drives; The operation torque of motor is controlled by pressure valve, and the pressure of motor and the relation of moment of torsion rely on to convert and obtain, and the torque value that torque meter shows is actual to be the operating pressure value of motor.The fluid pressure type torque wrench is a progress than mechanical shock formula spanner, and the control of operation torque is comparatively accurate, also is easy to adjustment.But this fluid pressure type torque wrench also exists some obviously not enough: (1) operation torque poor stability; Because with the operating pressure of the motor torque value that converts, and the output torque of motor also receives the influence of motor mechanical efficiency except that by the operating pressure decision; After the oily temperature rise of hydraulic system; Significant change can take place in the mechanical efficiency of motor, and the opening feature of hydraulic circuit pressure-control valve also can change, and causes the definite at normal temperatures operating pressure and the conversion relation of moment of torsion to change; Here it is at present all with the setting operating pressure of hydraulic motor as the out-of-work track wrench of bolt collar, all have the bad main cause of torque value stability; (2) owing to be single-end spanner, the fastening bolt of the rail left and right sides can not be screwed simultaneously, and the buckle press of fastener is unbalanced, causes the rail both sides to receive offset loading force, influences the accurate location of rail; (3) the rail left and right sides fastener during operation, need lift the rear portion fuselage and cross over rail successively, has increased operator's labour intensity.
4, double end fluid pressure type torque wrench (centre-to-centre spacing is non-adjustable).
This structure spanner also is to adopt hydraulic motor as the power that drives bolt collar, through two output shafts of transfer gear box the fastening bolt of rail both sides is screwed or is loosened operation with a motor.Except existing equally the shortcoming of " operation torque poor stability " with single head fluid pressure type torque wrench; Not enough below also existing: (1) is because output shaft is the fixed center distance; Only be applicable to the rail clip operation of same model,, can only adopt " universal joint " formula bolt collar for adapting to the deviation of fastening bolt centre-to-centre spacing; Sleeve often is in heeling condition work, has reduced the accuracy of the moment of torsion of screwing; (2) owing to drive two bolt collar work with a motor simultaneously through transfer gear box, two bolt collars can only rotate synchronously, so the fastening bolt of rail both sides can't reach the suitable state of screwing simultaneously, are commonly called as " false double end ".
Other; For example Chinese patent CN201128065Y discloses a kind of high-speed railway hydraulic bolt spanner, dynamical system and work system that it adopts branch to be arranged; Both are connected into one through draw bail; The fluid pressure line of two systems is communicated with, and wherein work system is provided with by hydraulic motor, sensor and bolt collar and constitutes the spanner Working mechanism, realizes the control to hydraulic power with single-chip computer control system and hydraulic manifold block control by variable control valve, the variable pump of gasoline engine, generator drive; The sensor that is arranged between hydraulic motor and the bolt collar detects the variation of moment of torsion, and then passes through Single-chip Controlling variable pump variable, and promptly system becomes big discharge capacity when little moment of torsion; Improve the working head rotating speed, when high pulling torque, become little discharge capacity, improve system pressure and realize high pulling torque; Simultaneously, tightening the characteristic of utilizing hydraulic fluid under the operating mode, with the parallel connection of two motors; Rail both sides fastening bolt is tightened simultaneously, has realized rail both sides load balance; That the adjusting device that is used to regulate two cover spanner Working mechanism centre-to-centre spacing then adopts is secondary by slow-speed motor, chain gear transmission, the move left and right of forward and reverse screw mandrel and the complex mechanism driving spanner Working mechanism formed with forward and reverse screw mandrel nut engaged.
This technical scheme has following deficiency:
Dynamical system and work system branch are arranged, though it has disperseed weight to be easy to rail up and down, have more increased system coordination control difficulty, and system architecture is complicated more, operating difficulties; Sensor sends control signal through single-chip computer control system to variable control valve; Improve the joystick of control variables cylinder promotion variable pump and realize that the variable variable pump changes the variation that discharge capacity realizes moment of torsion; Control principle relative complex not only; And owing to indirect control causes the moment of torsion control accuracy not enough, the variation of hydraulic system oil temperature that more serious is is very big to the influence of motor output torque, and the control of output torque is difficult to reach perfect condition; When the bolt tension, when being in " locked " state, torque control system can't detect the moment of torsion of adjustment bolt, possibly cause locked with bolts under the state of tension; Can not carry out the adjustment of moment of torsion respectively to the bolt of both sides; The governor motion that is used to regulate two cover spanner Working mechanism centre-to-centre spacing is too complicated, has reduced the precision and the reliability of adjustment.
In sum, mainly there is following common problem in existing various fastening bolt spanner:
(1) operation torque precision of bolt collar not high (can only reach 7-10%) or instability;
(2) bolt collar of the left and right sides operation of can not screwing simultaneously;
(3) the sleeve centre-to-centre spacing of double (end) wrench is fixed, and can not adapt to the needs of dissimilar fasteners;
(4) the operation torque value of bolt collar or not indication, perhaps misregister is not easy to operator's monitoring or inspection;
(5) model structure that has is too complicated, operation inconvenience.
For this reason, the application's utility model people proposes effective solution to the defective of above-mentioned conventional art through the application.
The utility model content
The utility model purpose is, a kind of rail clip bolt high-precision intelligent spanner is provided, satisfying the requirement of Line for Passenger Transportation and the operation of high ferro non-fragment orbit circuit contacting piece bolt, the technique effect that will reach be:
(1) screw the torque precision of bolt be stabilized in ± 5% in;
(2) fastening bolt of rail both sides is screwed simultaneously;
(3) the fastening bolt spanner adapts to the needs of dissimilar, different centre-to-centre spacing fasteners;
(4) screw moment of torsion can 80-350Nm on a large scale in accurately be provided with, and can clear demonstration torque value;
(5) simplified structure, the reliability of raising system.
For achieving the above object, the track wrench that the utility model provided is realized through following technical scheme:
A kind of rail clip bolt high-precision intelligent spanner; Having vehicle frame, dynamical system and work system forms; Vehicle frame is located on the orbital plane through wheel frame, and dynamical system is arranged on the vehicle frame, and dynamical system is connected with oil pump and control valve assembly to hydraulic motor feed drive power; Also be provided with work system on the vehicle frame, it comprises two groups of vertically disposed equipments, and each organizes bolt collar and the hydraulic motor that drives the bolt collar rotation that equipment comprises coaxial connection.
Preferably, be serially connected with the torque sensor that is used for torque condition is passed to the moment of torsion controller between bolt collar and the hydraulic motor; The moment of torsion controller is connected with the control valve assembly again.
Preferably, torque sensor is connected with a torque monitoring epiphase with the moment of torsion controller, in order to keep watch on instant moment of torsion.
Preferably, two covers can be worked simultaneously about being provided with, and are tightened onto to set torque value and stop automatically, and make the bolt screwing mechanism that works alone that the fastening bolt of both sides can loosen simultaneously.
Preferably, two groups of equipments are separately positioned on an end of two support arms, and the other end of two support arms is rotatably mounted to together by a center fixation pin.
Preferably, said fastener two support arms are AND DEWATERING FOR ORIFICE STRUCTURE.
Preferably, fastener two arm supports are on a crossbeam with holes, and said crossbeam and support arm are mutually permanently connected support arm and crossbeam adjustable ground through steady pin, in order to the spacing of two bolt collars is regulated.
Preferably, said torque monitoring table has instant torque value display unit.
Preferably, said torque monitoring table is a pointer-type or digital.
Preferably, said oil pump directly is connected by petrol engine drivingly.
Preferably, said hydraulic motor is the gerotor hydraulic motor.
Preferably, the oil pump in said oil pump and the control valve assembly is a duplex gear pump.
The operation principle and the beneficial effect of the utility model are following:
The method of operating of a kind of rail clip bolt of the utility model high-precision intelligent spanner; It controls the action of hydraulic motor according to high-precision torque sensor to the screw testing result of moment of torsion of bolt of bolt collar, realizes the High Accuracy Control that fastening bolt is screwed moment of torsion.Two groups of equipments work independently; Each other do not have directly influence, about two overlap the device that works alone and respectively track bolt screwed, can realize that left and right sides bolt collar works simultaneously; Be tightened onto the setting torque value and stop automatically, also can the fastening bolt of both sides be loosened simultaneously; Another main inventive point of the utility model is; The moment of torsion TT&C system detects the tightening torque of the fastening bolt of having screwed exactly; Surpass setting value ± 5% and some bolt is oppositely unscrewed unloading, and then be torqued-up to setting value again, realize correcting automatically the function of fastening bolt moment of torsion.And two groups of equipment spacings only need get final product through support arm with holes is fixing about the utility model, and are not only easy but also reliable.
The utility model changes the fuel delivery of hydraulic motor to the measurement result of the moment of torsion of screwing of bolt collar according to the moment of torsion controller.When the moment of torsion of screwing of bolt collar during less than setting value; The rotary speed of bolt collar raises, and the moment of torsion of screwing of bolt collar is during greater than setting value, and the rotary speed of bolt collar reduces; Make full use of engine power, accomplish the automatic adjustment of underloading high speed and low-speed heave-load.
Two groups of equipments that work independently about the utility model is provided with; It has independently fluid power system respectively; Torque value according to preset is operated track bolt, can realize that left and right sides bolt collar works simultaneously, is tightened onto to set torque value and stop automatically; Also can the fastening bolt of both sides be loosened simultaneously.
The centre-to-centre spacing of two cover bolt screwing mechanisms can be regulated and secure fixation as required about the utility model, and is simple and reliable for structure.
The moment of torsion TT&C system of the utility model can accurately detect the tightening torque of the fastening bolt of having screwed, surpasses setting value ± 5% and o'clock can automatically bolt oppositely be unscrewed unloading, and then be torqued-up to setting value again; Can not be torqued-up to setting value automatically when reaching setting value, realize correcting automatically the function of fastening bolt moment of torsion.
The torque value that two cover moment of torsion observing and controlling mechanisms are detected about the utility model, respectively by about two torque meters show.
Below, combine accompanying drawing at length to further describe the technical characterictic of the utility model through the specific embodiment.
Description of drawings
Fig. 1 is the utility model rail clip bolt high-precision intelligent spanner configured in one piece sketch map;
Fig. 2 is that the A of work system among Fig. 1 is to sketch map.
Description of reference numerals: torque sensor 1, bolt collar 2, hydraulic motor 3, center fixation pin 4, support arm 41; Crossbeam 42, support arm steady pin 43, moment of torsion controller 5, torque monitoring table 6, oil pump and control valve assembly 7; Control module 8, dynamical system 9, vehicle frame 10, guide wheel 11, orbital plane 12.
The specific embodiment
Referring to Fig. 1, the utility model rail clip bolt high-precision intelligent spanner has vehicle frame 10, is erected on the orbital plane 12 through guide wheel 11; Dynamical system 9 drives oil pump systems with petrol engine as prime mover, is placed on the vehicle frame 10, and this oil pump directly drives through petrol engine.
Oil pump and control valve assembly 7 press power to hydraulic motor 3 transferring oils; Make the pressure of hydraulic system and the running parameter that flow adapts to hydraulic motor 3; This hydraulic motor 3 is the gerotor hydraulic motor, and the oil pump in above-mentioned oil pump and the control valve assembly 7 is a duplex gear pump; Also be provided with work system on the vehicle frame 10, it comprises two groups of vertically disposed equipments, and each device comprises the bolt collar 2 and the hydraulic motor 3 that drives bolt collar 2 rotations of coaxial connection, is serially connected with torque sensor 1 between bolt collar 2 and the hydraulic motor 3; Torque sensor 1 is connected with moment of torsion controller 5, and torque sensor 1 passes to moment of torsion controller 5 with torque condition; Moment of torsion controller 5 is connected with oil pump and control valve assembly 7 with hydraulic motor 3 again, and the moment of torsion output state of hydraulic motor 3 is controlled; Torque monitoring table 6 is connected with moment of torsion controller 5 with torque sensor 1, in order to monitor actual output torque.Torque monitoring table 6 shows instant torque value, both can adopt pointer instrument to show, also can adopt digital instrument to show, is not the protection main points of the utility model, need not to give unnecessary details.Two groups of equipments all work independently, and observing and controlling separately shows respectively, do not have directly influence each other, and this also is one of main inventive point of the utility model.
Referring to Fig. 2, the A that is depicted as work system among Fig. 1 is to signal.For clear another main inventive point of showing the utility model, this figure has only described and support arm 41 direct-connected frame for movements.Two groups of bolt collars 2 are arranged on the far-end of support arm 41; Two support arms 41 are AND DEWATERING FOR ORIFICE STRUCTURE; Support arm 41 is fixing rotationally by a center fixation pin 4 jointly, two groups of bolt collars 2 can be moved, simultaneously respectively along an arc section that with steady pin 4 is the center of circle; Two support arms 41 are supported on the crossbeam 42, and 42 on crossbeam and vehicle frame 10 fix; Two support arm steady pins 43 are fixed together two support arm 41 adjustable grounds and crossbeam 42, that is two support arms 41 are mobile in certain deciliter angular range, in view of the above the spacing of two bolt collars 2 regulated respectively mutually.Because support arm 41 only plays the effect of support, bring the facility in the design for the structure of support arm 41.
According to said apparatus; The method of operating of a kind of rail clip bolt of the utility model high-precision intelligent spanner, it controls the action of hydraulic motor 3 according to the screw testing result of moment of torsion of bolt of high-precision torque sensor 1 pair of bolt collar 2, realizes the High Accuracy Control that fastening bolt is screwed moment of torsion; Two groups of equipments work independently; Each other do not have directly influence, about two overlap the device that works alone and respectively bolt screwed, can realize that left and right sides bolt collar works simultaneously; Be tightened onto the setting torque value and stop automatically, also can the fastening bolt of both sides be loosened simultaneously; Another important inventive point of the utility model is; Moment of torsion TT&C system 5 detects the tightening torque of the fastening bolt of having screwed exactly; Surpass setting value ± 5% and some bolt is oppositely unscrewed unloading; And then be torqued-up to setting value again, and realize correcting automatically the function of fastening bolt moment of torsion, reach the utility model so-called " intelligence " effect.When the moment of torsion of screwing of bolt collar 2 during less than particular value, increase the fuel delivery of hydraulic oil pump, the rotary speed of bolt collar 2 improves; When the moment of torsion of screwing of bolt collar 2 during greater than particular value, rotary speed reduces.The moment of torsion TT&C system can be by the selected needed torque setting value of step switch in the 80-350Nm scope.Two groups of equipment spacings only need be fixed through support arm steady pin 43 and got final product about the utility model, and are not only easy but also reliable.
Claims (12)
1. rail clip bolt high-precision intelligent spanner; Having vehicle frame (10), dynamical system (9) and work system forms; Vehicle frame (10) is erected on the orbital plane (12) through guide wheel (11); Dynamical system (9) is arranged on the vehicle frame (10), it is characterized in that: dynamical system (9) is connected with oil pump and control valve assembly (7) to hydraulic motor (3) feed drive power; Vehicle frame also is provided with work system on (10), and it comprises two groups of vertically disposed equipments, the hydraulic motor (3) that each is organized the bolt collar (2) that equipment comprises coaxial connection and drives bolt collar (2) rotation.
2. rail clip bolt high-precision intelligent spanner according to claim 1; It is characterized in that: be serially connected with the torque sensor (1) that is used for torque condition is passed to moment of torsion controller (5) between bolt collar (2) and the hydraulic motor (3), moment of torsion controller (5) is connected with control valve assembly (7) again.
3. rail clip bolt high-precision intelligent spanner according to claim 2 is characterized in that: torque sensor (1) is connected with a torque monitoring table (6) with moment of torsion controller (5), in order to keep watch on instant moment of torsion.
4. rail clip bolt high-precision intelligent spanner according to claim 3; It is characterized in that: two covers can be worked simultaneously about being provided with; Be tightened onto and set torque value and stop automatically, and make the bolt screwing mechanism that works alone that the fastening bolt of both sides can loosen simultaneously.
5. rail clip bolt high-precision intelligent spanner according to claim 4; It is characterized in that: two groups of equipments are separately positioned on an end of two support arms (41), and the other end of two support arms (41) is rotatably mounted to together by a center fixation pin (4).
6. rail clip bolt high-precision intelligent spanner as claimed in claim 5 is characterized in that: said fastener two support arms (41) are AND DEWATERING FOR ORIFICE STRUCTURE.
7. rail clip bolt high-precision intelligent spanner as claimed in claim 6; It is characterized in that: fastener two support arms (41) are supported on the crossbeam with holes (42); Said crossbeam (42) and support arm (41) are mutually permanently connected support arm (41) and crossbeam (42) adjustable ground through steady pin (43), in order to the spacing of two bolt collars is regulated.
8. rail clip bolt high-precision intelligent spanner according to claim 3, it is characterized in that: said torque monitoring table (6) has instant torque value display unit.
9. rail clip bolt high-precision intelligent spanner according to claim 3 is characterized in that: said torque monitoring table (6) is pointer-type or digital.
10. rail clip bolt high-precision intelligent spanner according to claim 1, it is characterized in that: said oil pump directly is connected by petrol engine drivingly.
11. rail clip bolt high-precision intelligent spanner according to claim 1 is characterized in that: said hydraulic motor (3) is the gerotor hydraulic motor.
12. rail clip bolt high-precision intelligent spanner according to claim 1 is characterized in that: the oil pump in said oil pump and the control valve assembly (7) is a duplex gear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205021059U CN202507047U (en) | 2011-12-06 | 2011-12-06 | High-precision intelligent spanner for track fastener bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205021059U CN202507047U (en) | 2011-12-06 | 2011-12-06 | High-precision intelligent spanner for track fastener bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202507047U true CN202507047U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205021059U Expired - Lifetime CN202507047U (en) | 2011-12-06 | 2011-12-06 | High-precision intelligent spanner for track fastener bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202507047U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107506929A (en) * | 2017-08-28 | 2017-12-22 | 中国铁道科学研究院铁道建筑研究所 | A kind of high-strength bolt construction information monitoring system and method |
| CN108044341A (en) * | 2017-12-21 | 2018-05-18 | 四川理工学院 | A kind of portable attaching/detaching apparatus for the dismounting of large scale equipment bottom bolts |
| CN108677630A (en) * | 2018-06-07 | 2018-10-19 | 中国铁建高新装备股份有限公司 | A kind of rail fastener maintenance work trolley |
| CN110565460A (en) * | 2019-09-12 | 2019-12-13 | 济南鑫泉诚信息科技有限公司 | Self-propelled rail bolt tightening and loosening device and method thereof |
| CN111390802A (en) * | 2020-03-26 | 2020-07-10 | 中扭科技(重庆)有限公司 | Double-head type mechanical wrench control system for bolt torque fixation |
| CN112025281A (en) * | 2020-08-31 | 2020-12-04 | 龙铁纵横（北京）轨道交通科技股份有限公司 | Automatic robot tightening system and method for rail fastener |
-
2011
- 2011-12-06 CN CN2011205021059U patent/CN202507047U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107506929A (en) * | 2017-08-28 | 2017-12-22 | 中国铁道科学研究院铁道建筑研究所 | A kind of high-strength bolt construction information monitoring system and method |
| CN108044341A (en) * | 2017-12-21 | 2018-05-18 | 四川理工学院 | A kind of portable attaching/detaching apparatus for the dismounting of large scale equipment bottom bolts |
| CN108044341B (en) * | 2017-12-21 | 2019-07-19 | 四川理工学院 | A kind of mobile attaching/detaching apparatus for the dismounting of large scale equipment bottom bolts |
| CN108677630A (en) * | 2018-06-07 | 2018-10-19 | 中国铁建高新装备股份有限公司 | A kind of rail fastener maintenance work trolley |
| CN108677630B (en) * | 2018-06-07 | 2023-11-07 | 中国铁建高新装备股份有限公司 | Railway fastener maintenance operation dolly |
| CN110565460A (en) * | 2019-09-12 | 2019-12-13 | 济南鑫泉诚信息科技有限公司 | Self-propelled rail bolt tightening and loosening device and method thereof |
| CN111390802A (en) * | 2020-03-26 | 2020-07-10 | 中扭科技(重庆)有限公司 | Double-head type mechanical wrench control system for bolt torque fixation |
| CN111390802B (en) * | 2020-03-26 | 2022-01-18 | 中扭科技(重庆)有限公司 | Double-head type mechanical wrench control system for bolt torque fixation |
| CN112025281A (en) * | 2020-08-31 | 2020-12-04 | 龙铁纵横（北京）轨道交通科技股份有限公司 | Automatic robot tightening system and method for rail fastener |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |
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| CX01 | Expiry of patent term |