CN107127894B - Broken barrier rescue device of flexible chain saw of imitative people formula - Google Patents
Broken barrier rescue device of flexible chain saw of imitative people formula Download PDFInfo
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- CN107127894B CN107127894B CN201710559456.5A CN201710559456A CN107127894B CN 107127894 B CN107127894 B CN 107127894B CN 201710559456 A CN201710559456 A CN 201710559456A CN 107127894 B CN107127894 B CN 107127894B
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- chain saw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/12—Saw-blades or saw-discs specially adapted for working stone
- B28D1/124—Saw chains; rod-like saw blades; saw cables
Abstract
The invention discloses a humanoid flexible chain saw obstacle breaking rescue device, which comprises an angle swing mechanism and a transverse moving mechanism, wherein the angle swing mechanism is connected with the transverse moving mechanism through a chain; the angle swing mechanism comprises a diamond chain saw mechanism, a hollow shaft worm gear reducer, a second shaft end retainer ring, a rotary limit switch, a first elastic coupling and a stepping motor; the diamond chain saw mechanism comprises a chain saw shaft, a connecting disc, a tapered roller bearing, a chain saw lower base plate, a first shaft end retainer ring, a bearing end cover, an induction sheet, a handheld chain saw, an elastic part, a fixed end cover and a pin shaft; the transverse moving mechanism comprises a moving limit switch, a linear guide rail, a supporting bent plate, a second elastic coupling, a transverse cutting motor, a trapezoidal lead screw, a sliding block, a lead screw nut and a nut bracket. The device has the advantages of high efficiency, low disturbance, high safety coefficient, detachability, good portability, small impact force, weak vibration and capability of breaking the barrier concrete wall in a narrow space, and integrally strengthens the working capacity and the barrier breaking and rescuing capacity of an individual soldier.
Description
Technical Field
The invention relates to the field of machinery, in particular to a human-simulated flexible chain saw obstacle breaking rescue device.
Background
China is a country with frequent earthquakes, and most of high-rise buildings with reinforced concrete structures are concrete frames and shear wall structures after collapse. And after the earthquake disaster happens, the rescue efficiency is extremely important to whether the rescue action is successful or not. In combination with the practical earthquake wrecker rescue at home and abroad in recent years, the traditional hand-held equipment for rescuing the wrecker concrete structure mainly comprises: expanders, rock drills, chainsaws, and the like. At present, the rescue modes are all realized by using a handheld tool of a rescue team member to break the barrier on the spot, so that the rescue team member is easy to fatigue, has low barrier breaking and rescue efficiency and is easy to collapse secondarily to cause life danger.
There are also known robotic chain saw cutting devices, such as US patent No. US20170066155A1, which discloses a cutting apparatus using a motor driven chain saw, characterized in that the apparatus for cutting wood improves the durability of the chain saw and reduces the energy loss during cutting. Although the cutting method of the wood device realizes the robot type cutting in the wood cutting process and can cut and shoot at a high place, the labor intensity of workers is reduced, the danger coefficient is reduced, and the mechanical operation is enhanced, the cutting method of the wood device has the following problems: this cutting device is only used for high-efficient lumbering, can not cut into square hole concrete shear force wall and rescue stranded personnel.
In addition, the chinese patent No. 201520163122.2 discloses a chain saw cutting machine test bed, which is characterized in that the test bed is used for concrete cutting of a reinforced concrete chain saw cutting machine. The test bed of the chain saw cutting machine can conveniently and efficiently test the cutting performance of the reinforced concrete chain saw cutting machine and the diamond saw chain matched with the reinforced concrete chain saw cutting machine. Although the invention has the advantages of simpler structure, lower cost, improved automation degree, improved cutting precision and improved trial cutting efficiency, the invention has the following defects: 1. when concrete is cut and steel bars or hard particles in the concrete meet, the cutting force is suddenly increased, machine shaking is easy to occur, and a cutting tool still possibly is scrapped; 2. because the device is the cutting test bench of chain saw, cut through removing the concrete piece, can not cut into square hole, degree of automation is restricted, can not be used in the earthquake scene.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problem of providing a human-simulated flexible chain saw barrier breaking rescue device. When the steel bar or the hard stone block is encountered in the cutting process, the flexible link can automatically give way, so that the chain saw is prevented from being damaged; the angle swing mechanism is matched with the transverse moving mechanism, so that the cutting angle of the chain saw relative to the wall can be adjusted, and the human-simulated cutting is realized. The device has the advantages of simple structure, high efficiency, low disturbance and convenient use.
The invention provides a human-simulated flexible chain saw obstacle breaking rescue device, which comprises an angle swing mechanism and a transverse moving mechanism, wherein the angle swing mechanism is connected with the transverse moving mechanism through a chain; the angle swing mechanism is characterized by comprising a diamond chain saw mechanism; the diamond chain saw mechanism comprises a chain saw shaft, a connecting disc, a tapered roller bearing, a chain saw lower base plate, a first shaft end retainer ring, a bearing end cover, an induction sheet, a handheld chain saw, an elastic part, a fixed end cover and a pin shaft;
the inner ring of the tapered roller bearing is arranged at one end of a chain saw shaft, and the outer ring of the tapered roller bearing is in contact with a lower bottom plate of the chain saw; the connecting disc is connected with the chain saw shaft through a flat key; the first shaft end retaining ring is fixed on one end face of the chain saw shaft and is in contact with an inner ring of the tapered roller bearing; the bearing end cover is fixed in the lower bottom plate of the chain saw; the handheld chain saw is connected with a lower bottom plate of the chain saw; the lower bottom plate of the chain saw is connected with the connecting disc through an elastic piece; the fixed end cover is arranged on the connecting disc, and the pin shaft is arranged on a lower bottom plate of the chain saw; the elastic piece is positioned through the fixed end cover and the pin shaft; the induction sheet is installed on the connecting disc.
Compared with the prior art, the invention has the beneficial effects that:
(1) The device is additionally provided with the angle swing mechanism in the transverse cutting process, and under the condition of certain cutting force, the pressure is increased by reducing the contact area between the chain of the handheld chain saw and the reinforced concrete wall, so that the cutting efficiency is improved. In the swinging process, after the chain and the concrete form a certain angle, the rotary limit switch works, and the concrete wall is cut by utilizing the self-locking function of the hollow shaft worm gear reducer.
(2) This device has increased flexible link, the elastic component promptly. The rotation of the connecting disc is converted into the angle swing adjustment of the angle swing mechanism through the elastic piece. The elastic piece is installed and positioned through the fixed end cover and the pin shaft, and the gap between the fixed end cover and the elastic piece is adjusted to play a role in adjusting the pre-tightening force. The flexible link plays the roles of energy storage, buffering and shock absorption in the cutting process, and the vibration of the system is reduced; when the cutting force of the steel bar and the hard stone is suddenly increased, the chain saw can automatically yield, the chain saw is prevented from being damaged, and the service life is prolonged.
(3) The diamond chain saw mechanism is formed by modifying a handheld chain saw, and has the characteristics of stable cutting, high rotating speed, low disturbance and high cutting efficiency.
(4) The device is connected with a frame with rotating and feeding functions through a flange and is used for providing feeding and rotating of the vertical concrete shear wall for the device. The purpose of the feed is to cut through the concrete shear wall; the other three sides of the square hole are cut in a rotating mode for rotating the device to form a complete rescue channel, so that the stretcher can enter the rescue device to be rescued.
(5) The device has the advantages of high efficiency, low disturbance, high safety coefficient, detachability, good portability, small impact force, weak vibration and capability of breaking the barrier concrete wall in a narrow space, and integrally strengthens the working capacity and the barrier breaking and rescuing capacity of an individual soldier.
Drawings
Fig. 1 is a front view of the whole structure of one embodiment of the human-simulated flexible chain saw obstacle breaking rescue device;
FIG. 2 is a left side view of the overall structure of one embodiment of the human-simulated flexible chain saw obstacle breaking rescue device;
fig. 3 is an internal view of the angle swing mechanism in fig. 2 of the humanoid flexible chain saw obstacle breaking rescue device;
fig. 4 is an axonometric view of the whole structure of a diamond chain saw mechanism of one embodiment of the human-simulated flexible chain saw obstacle breaking rescue device;
fig. 5 is a front view of the whole structure of a diamond chain saw mechanism of an embodiment of the humanoid flexible chain saw obstacle breaking rescue device;
FIG. 6 is a top view of the overall structure of a diamond chain saw mechanism according to an embodiment of the barrier-breaking rescue device of the humanoid flexible chain saw;
fig. 7 is an axonometric view of the whole structure of an angle swing mechanism of one embodiment of the human-simulated flexible chain saw obstacle breaking rescue device;
FIG. 8 is a front view of the overall structure of a lateral moving mechanism of an embodiment of the human-simulated flexible chain saw obstacle breaking rescue device;
fig. 9 is a top view of the whole structure of a transverse moving mechanism of one embodiment of the humanoid flexible chain saw obstacle breaking rescue device;
in the figure: 1. a diamond chain saw mechanism; 2. an angle swing mechanism; 3. a lateral movement mechanism; 4. a chainsaw shaft; 5. a connecting disc; 6. a tapered roller bearing; 7. a chain saw lower base plate; 8. a first shaft end retainer ring; 9. a bearing end cap; 10. a small flat key; 11. an induction sheet; 12. an upper positioning screw; 13. a hand-held chain saw; 14. an elastic member; 15. fixing an end cover; 16. a pin shaft; 17. a hollow shaft worm gear reducer; 18. a second shaft end retainer ring; 19. a lower set screw; 20. a flat bond; 21. rotating a limit switch; 22. a first resilient coupling; 23. a stepping motor; 24. moving a limit switch; 25. a linear guide rail; 26. supporting the bent plate; 27. a second resilient coupling; 28. a transverse cutting motor; 29. a trapezoidal lead screw; 30. a slider; 31. a lead screw nut; 32. a nut bracket; 33. and (4) flat plate.
Detailed Description
Specific examples of the present invention are given below. The specific examples are only intended to illustrate the invention in further detail and do not limit the scope of protection of the claims of the present application.
The invention provides a human-simulated flexible chain saw obstacle breaking rescue device (see figures 1-9, the device for short), which comprises an angle swing mechanism 2 and a transverse moving mechanism 3;
the angle swing mechanism 2 comprises a diamond chain saw mechanism 1, a hollow shaft worm gear reducer 17, a second shaft end retainer ring 18, a lower positioning screw 19, a flat key 20, a rotary limit switch 21, a first elastic coupling 22 and a stepping motor 23; the diamond chain saw mechanism 1 comprises a chain saw shaft 4, a connecting disc 5, a tapered roller bearing 6, a chain saw lower bottom plate 7, a first shaft end retainer ring 8, a bearing end cover 9, a small flat key 10, an induction sheet 11, an upper positioning screw 12, a handheld chain saw 13, an elastic piece 14, a fixed end cover 15 and a pin shaft 16; the transverse moving mechanism 3 comprises a moving limit switch 24, a linear guide rail 25, a supporting bent plate 26, a second elastic coupling 27, a transverse cutting motor 28, a trapezoidal lead screw 29, a sliding block 30, a lead screw nut 31 and a nut bracket 32;
the inner ring of the tapered roller bearing 6 is arranged at one end of the chain saw shaft 4, and the outer ring of the tapered roller bearing is in contact with a lower bottom plate 7 of the chain saw; the connecting disc 5 is connected with the chain saw shaft 4 through a small flat key 10, the lower end of the connecting disc 5 is positioned through a shaft shoulder of the chain saw shaft 4, and the upper end of the connecting disc is pressed tightly through a tapered roller bearing 6; the first shaft end check ring 8 is fixed on one end face of the chain saw shaft 4 through an upper positioning screw 12 and is in contact with the inner ring of the tapered roller bearing 6 to axially position the chain saw shaft 4; the bearing end cover 9 is fixed in the lower bottom plate 7 of the chain saw through screws to axially position the tapered roller bearing 6; the handheld chain saw 13 is connected with the chain saw lower bottom plate 7 through a bolt; the lower bottom plate 7 of the chain saw is connected with the connecting plate 5 through an elastic piece 14; the fixed end cover 15 is arranged on the connecting disc 5, and the pin shaft 16 is arranged on the lower bottom plate 7 of the chain saw; the elastic piece 14 is positioned through a fixed end cover 15 and a pin shaft 16, and the pretightening force of the elastic piece 14 can be adjusted through the fixed end cover 15; the handheld chain saw 13 is matched with the pair of tapered roller bearings 6 through a chain saw lower bottom plate 7, so that the handheld chain saw is sleeved on the chain saw shaft 4 in an empty mode; the induction sheet 11 is arranged on the connecting disc 5, and when the diamond chain saw mechanism 1 swings to a certain position, the rotary limit switch 21 approaches the induction sheet 11, and the rotary limit switch 21 works, so that the stepping motor 23 in the angle swing mechanism 2 stops working;
the other end of the chain saw shaft 4 is arranged in a hollow shaft worm gear reducer 17, a flat key 20 is circumferentially positioned with the chain saw shaft 4, and a shaft shoulder of the chain saw shaft 4 and a second shaft end retainer ring 18 are axially positioned; the second shaft end baffle ring 18 is fixed on the other end surface of the chain saw shaft 4 through a lower positioning screw 19; the output end of the stepping motor 23 is connected with the hollow shaft worm gear reducer 17 through a first elastic coupling 22; the rotary limit switch 21 is arranged on the support bent plate 26; the hollow shaft worm gear reducer 17 is fixedly connected with a support bent plate 26 through a screw; the angle swing of the device is realized by that a stepping motor 23 drives an input shaft of a hollow shaft worm gear reducer 17 to rotate through a first elastic coupling 22, so that the chain saw realizes the angle swing function, the chain saw swings left and right in a reciprocating way through the forward and reverse rotation of the stepping motor 23, and after swinging to a certain angle, a rotary limit switch 21 works, the swing stops and the cutting is carried out;
the movable limit switch 24 and the linear guide rail 25 are arranged on the flat plate 33; the trapezoidal lead screw 29 is arranged on the flat plate 33 through a bearing and a bearing seat; an output shaft of the transverse cutting motor 28 is connected with a trapezoidal lead screw 29 through a second elastic coupling 27; the nut bracket 32 is connected with the screw nut 31; the lead screw nut 31 is connected with the trapezoidal lead screw 29 for matching transmission; the support bent plate 26 is connected with a nut bracket 32 through a screw; the sliding block 30 is arranged on the support bent plate 26 and is matched with the linear guide rail 25 to realize the movement of the support bent plate 26; the transverse movement of the device drives the nut bracket 32 to transversely move through the rotation of the transverse cutting motor 28, so that the supporting bent plate 26 slides along the linear guide rail 25, and when the cutting is in place at the movable limit switches 24 at the two ends of the linear guide rail 25, the movable limit switches 24 work to complete the transverse line movement of the supporting bent plate 26.
Because the hand-held chain saw 13 is in an empty state, in order to change the swing angle of the hand-held chain saw 13 in the cutting process, the connecting disc 5 must be circumferentially positioned with the chain saw shaft 4 through the small flat key 10, the connecting disc 5 is connected with the chain saw lower bottom plate 7 through the elastic piece 14, and finally the stepping motor 23 drives the input shaft of the hollow shaft worm gear reducer 17 to rotate through the first elastic coupling 22, so that the chain saw realizes the angle swing function, and the chain saw swings left and right in a reciprocating manner through the forward and reverse rotation of the stepping motor 23. The significance of the angle adjustment is that under the condition of certain cutting force, the contact area between the chain of the handheld chain saw 13 and the reinforced concrete wall is reduced to increase the pressure and improve the cutting efficiency.
In the process of cutting concrete, a flexible link, namely an elastic member, is added, and the elastic member 14 is a rubber spring in the embodiment. The elastic member 14 is a hollow cylindrical rubber spring, and the rotation of the connecting disc 5 is converted into the angular oscillation adjustment of the angular oscillation mechanism 2 through the elastic member 14. The elastic part 14 is installed and positioned through the fixed end cover 15 and the pin shaft 16, the gap between the fixed end cover 15 and the elastic part 14 is adjusted, the pre-tightening force is adjusted, and therefore the elastic part 14 plays a role in energy storage, buffering and shock absorption in the cutting process.
The transverse moving mechanism 3 can realize transverse cutting of the concrete shear wall body by the cutter and is used for cutting one side of the square hole.
The device is connected with the rack with rotating and feeding functions through a flange, and is used for providing feeding and rotating transposition of a vertical concrete shear wall for the device, so that a polygonal rescue channel is cut on the wall. The purpose of the feed is to cut through the concrete shear wall; the purpose of rotation is in order to make this device cut out complete rescue hole to the stretcher gets into in time rescue.
The work principle and the work flow of the human-simulated flexible chain saw obstacle breaking rescue device are as follows:
connect this device through flange and frame that has rotation and feed function, prepare cutting work: firstly, the transverse cutting motor 28 is connected with the trapezoidal lead screw 29 through the second elastic coupling 27, the trapezoidal lead screw 29 is driven to rotate by the rotation of the transverse cutting motor 28, the transverse cutting motor is converted into the movement of the lead screw nut 31 and the nut bracket 32 along the trapezoidal lead screw 29, so that the supporting bent plate 26 transversely moves along the linear guide rail 25, the diamond chain saw mechanism 1 transversely moves, when the diamond chain saw mechanism 1 transversely moves to one end of the linear guide rail 25, the movable limit switch 24 works, the transverse cutting motor 28 stops working, and the cutting process is ready to be finished.
Then the machine frame with the rotating and feeding functions provides feeding of the cutter in the device vertical to the concrete, the longitudinal movement of the device is converted, the device is further enabled to cut the concrete shear wall vertically, and after the cutter penetrates through the concrete shear wall, the machine frame with the rotating and feeding functions stops working. The transverse cutting motor 28 in the transverse moving mechanism 3 works, the trapezoidal lead screw 29 is driven to rotate through the second elastic coupling 27, the trapezoidal lead screw 29 rotates through the lead screw nut 31 and the nut support 32 to drive the supporting bent plate 26 and the sliding block 30 to transversely move along the linear guide rail 25, so that transverse cutting of a cutter is driven, in the transverse cutting process, after a distance is transversely cut, the transverse cutting motor 28 stops working, and the angle swinging mechanism 2 drives the angle swinging mechanism 2 to swing the diamond chain saw mechanism 1 through the forward rotation of the stepping motor 23 and the driving of the first elastic coupling 22. When the stepping motor 23 swings to a certain angle, the rotation limit switch 21 contacts the right induction sheet 11, so that the stepping motor 23 stops working and stops swinging of the angle. The transverse cutting motor 28 is continuously started to continue the transverse cutting. After cutting for a certain distance, the transverse cutting motor 28 stops working, the stepping motor 23 is started in a reverse rotation mode, and when the rotation limit switch 21 contacts the induction sheet 11 in the middle, the stepping motor 23 stops working, and the angle swing stops. The cross cut motor 28 continues to be activated to continue the cross cut. After cutting for a certain distance, the transverse cutting motor 28 stops working, the stepping motor 23 keeps reversing continuously, and when the rotary limit switch 21 contacts the left induction sheet 11, the stepping motor 23 stops working, and the angular swing stops. The transverse cutting motor 28 is continuously started to continue transverse cutting, and the angle of the cutter is continuously adjusted during the transverse cutting process to repeat the cutting method. When the cutter in the diamond chain saw mechanism 1 cuts and moves to the other end of the linear guide rail 25, the movement limit switch 24 at the other end works, and the transverse cutting motor 28 stops driving the trapezoidal screw 29 to work. The cutter in the device is quickly withdrawn by utilizing the reverse rotation function of the feeding motor in the frame with the rotation and feeding functions, so that one side of the concrete shear wall is cut and prepared for transposition work. When the square hole needs to be excavated in an earthquake rescue site, the transposition motor in the rack with the rotating and feeding functions is started to rotate the device by 90 degrees, the transposition motor stops working, all the steps are continuously repeated, the other three sides are cut, and a complete square hole is cut to rescue the device. When the condition of the earthquake rescue site is limited and the triangular hole needs to be excavated, the transposition motor in the rack with the rotating and feeding functions is started to rotate 120 degrees, the transposition motor stops working, all the steps are continuously repeated, the other two sides are cut, and a complete triangular hole is cut, so that the stretcher can enter the rescue site even if the rescue is carried out.
Nothing in this specification is said to apply to the prior art.
Claims (3)
1. A human-simulated flexible chain saw obstacle breaking rescue device comprises an angle swing mechanism and a transverse moving mechanism; the angle swing mechanism is characterized by comprising a diamond chain saw mechanism; the diamond chain saw mechanism comprises a chain saw shaft, a connecting disc, a tapered roller bearing, a chain saw lower base plate, a first shaft end retainer ring, a bearing end cover, an induction sheet, a handheld chain saw, an elastic part, a fixed end cover and a pin shaft;
the inner ring of the tapered roller bearing is arranged at one end of a chain saw shaft, and the outer ring of the tapered roller bearing is in contact with a lower bottom plate of the chain saw; the connecting disc is connected with the chain saw shaft through a flat key; the first shaft end retaining ring is fixed on one end face of the chain saw shaft and is in contact with an inner ring of the tapered roller bearing; the bearing end cover is fixed in the lower bottom plate of the chain saw; the handheld chain saw is connected with a lower bottom plate of the chain saw; the lower bottom plate of the chain saw is connected with the connecting disc through an elastic piece; the fixed end cover is arranged on the connecting disc, and the pin shaft is arranged on a lower bottom plate of the chain saw; the elastic piece is positioned through the fixed end cover and the pin shaft; the induction sheet is arranged on the connecting disc;
the angle swing mechanism further comprises a hollow shaft worm gear reducer, a second shaft end retainer ring, a rotary limit switch, a first elastic coupling and a stepping motor; the other end of the chain saw shaft is arranged in the hollow shaft worm gear reducer, a flat key is circumferentially adopted to be positioned with the chain saw shaft, and a shaft shoulder of the chain saw shaft and a second shaft end retaining ring are axially adopted to be positioned; the second shaft end retaining ring is fixed on the other end face of the chain saw shaft; the output end of the stepping motor is connected with the hollow shaft worm gear reducer through a first elastic coupling; the rotary limit switch is arranged on the support bent plate; and the hollow shaft worm gear reducer is fixedly connected with the supporting bent plate.
2. The humanoid flexible chain saw obstacle breaking rescue device as claimed in claim 1, wherein the transverse moving mechanism comprises a moving limit switch, a linear guide rail, a supporting bent plate, a second elastic coupling, a transverse cutting motor, a trapezoidal screw, a slide block, a screw nut and a nut bracket; the movable limit switch and the linear guide rail are arranged on the flat plate; the trapezoidal lead screw is arranged on the flat plate; an output shaft of the transverse cutting motor is connected with the trapezoidal screw rod through a second elastic coupling; the nut bracket is connected with the screw nut; the lead screw nut is connected with the trapezoidal lead screw; the support bent plate is connected with the nut bracket; the sliding block is arranged on the supporting bent plate and matched with the linear guide rail.
3. The humanoid flexible chain saw obstacle breaking rescue device as claimed in claim 1, wherein the device is connected with a frame with rotating and feeding functions through a flange, and is used for providing feeding and rotating indexing of a vertical concrete shear wall for the device, so that a polygonal rescue channel is cut on the wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710559456.5A CN107127894B (en) | 2017-07-11 | 2017-07-11 | Broken barrier rescue device of flexible chain saw of imitative people formula |
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| CN201710559456.5A CN107127894B (en) | 2017-07-11 | 2017-07-11 | Broken barrier rescue device of flexible chain saw of imitative people formula |
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| CN107127894A CN107127894A (en) | 2017-09-05 |
| CN107127894B true CN107127894B (en) | 2023-04-18 |
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| CN108490390B (en) * | 2018-02-28 | 2022-05-17 | 北京理工大学 | Mobile magnetic source positioning device |
| CN109333833A (en) * | 2018-12-17 | 2019-02-15 | 深圳盛世电梯有限公司 | A kind of automatic chain saw cut-off machine |
| CN109397550A (en) * | 2018-12-17 | 2019-03-01 | 深圳盛世电梯有限公司 | A kind of chain saw cut-off machine |
| CN110682198B (en) * | 2019-10-14 | 2021-04-13 | 河北工业大学 | Flexible cutting tool that feeds of interior circle dull polish piece |
| CN113026584B (en) * | 2021-04-24 | 2022-08-02 | 南京润华建设集团有限公司 | Cutting and dismantling method for few-bracket chain saw of tied arch bridge |
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| US4127046A (en) * | 1976-11-15 | 1978-11-28 | Jackson E L | Combination portable and stationary, bench-mounted chain saw apparatus |
| JPH07229314A (en) * | 1994-02-17 | 1995-08-29 | Daimoshiya:Kk | Cut and removal method of concrete structure in water and guide pulley base |
| JP2004188989A (en) * | 2004-01-08 | 2004-07-08 | Shinko Kogyo Kk | Method for cutting-off manhole neck |
| US7281536B1 (en) * | 2006-03-29 | 2007-10-16 | Shibushou Construction Co., Ltd. | Cutting machine using wire saw, cutting method using wire saw, and mobile machine having wire saw cutting machine |
| CN101480816A (en) * | 2009-01-23 | 2009-07-15 | 舒汉平 | Hydraulic concrete cutting system |
| CN202412478U (en) * | 2011-12-20 | 2012-09-05 | 长沙市德天冶金科技有限公司 | Wire sawing machine for diamond |
| CN102626948B (en) * | 2012-04-09 | 2014-08-13 | 莱州市宏泰石材机械有限公司 | Multifunctional computer rope saw |
| KR101704444B1 (en) * | 2016-05-25 | 2017-02-09 | 오은진 | Apparatus for forming blade-curves on a stone and stone product thereby |
| CN206883927U (en) * | 2017-07-11 | 2018-01-16 | 河北工业大学 | A kind of apery formula flexibility chain saw barrier-breaking deliverance apparatus |
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