CN108705486B - Intelligent stretcher - Google Patents
Intelligent stretcher Download PDFInfo
- Publication number
- CN108705486B CN108705486B CN201810773884.2A CN201810773884A CN108705486B CN 108705486 B CN108705486 B CN 108705486B CN 201810773884 A CN201810773884 A CN 201810773884A CN 108705486 B CN108705486 B CN 108705486B
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- oil cylinder
- stretching
- stretching rod
- fixed
- sleeve
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- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 230000007704 transition Effects 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B29/00—Accessories
- B25B29/02—Bolt tensioners
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses an intelligent stretcher, wherein an oil cylinder is connected above a base of the intelligent stretcher, and a middle connecting seat is fixed above the oil cylinder; a driving gear, a transition gear and a driven gear are horizontally arranged in the driving cavity; a stretching rod is vertically fixed on the driven gear, the bottom end of the stretching rod is a stretching head, an upper radial offset reset groove is formed in a middle connecting seat, a lower radial offset reset groove is formed in the top of the base, the bottom end of the stretching head is provided with an internal thread at the inner diameter of the center of the bottom end; the lower half part of the stretching head is provided with a poking sleeve, the periphery of the poking sleeve is connected with a gear box, and the upper part of the gear box is connected with a speed reducer II through a connecting shaft. The intelligent stretcher is novel in structural design, simple in structure, capable of realizing stretching and fixing of a screw rod and disassembling and locking of a nut through two driving motors and one oil cylinder, capable of automatically completing whole-course actions, high in operation efficiency and ideal.
Description
Technical Field
The invention relates to the technical field of stretchers, in particular to an intelligent stretcher matched with an industrial robot.
Background
It is known that during the assembly and disassembly of mechanical components, the screw and nut disassembly and assembly operations are generally carried out by operators using wrenches or pneumatic tools, but such devices have technical drawbacks, mainly represented by: 1. the existing disassembling tool is low in efficiency and low in automation degree; 2. aiming at some parts of threaded connection of the screw and the nut, the existing disassembly and assembly parts cannot be disassembled and assembled, and can be disassembled and locked manually only; 3. the existing pneumatic dismounting tool is complex in structure, difficult to dismount, multiple in parts and easy to fail.
To the drawback in the prior art, as the industry technicians, how to design an intelligent stretcher special for screw and nut quick assembly disassembly is used for solving the technical problem that the screw and nut are difficult to industrialize quick assembly disassembly in the prior art and is to be solved urgently by the industry technicians.
Disclosure of Invention
The invention aims to provide an intelligent stretcher, so as to solve the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the intelligent stretcher comprises a base, wherein the center of the base is designed to be through up and down, an oil cylinder is connected above the base, an oil filling port is arranged on the front side surface of the oil cylinder, a middle connecting seat is fixed above the oil cylinder through a peripheral bolt, the top of the middle connecting seat is connected with an upper cover through a bolt, and a driving part is arranged between the middle connecting seat and the upper cover to install the base; the top of the driving component mounting base is provided with a driving cavity, the driving cavity is sealed by an upper cover, a driving gear, a transition gear and a driven gear are respectively and horizontally arranged in the driving cavity from left to right, the driving gear is arranged at the top of a speed reducer I and is connected with the speed reducer I, and a servo motor I is arranged below the speed reducer I; a stretching rod is vertically fixed on the driven gear, an upper radial offset reset groove is formed around the stretching rod at the top of the middle connecting seat, a stress sleeve is circumferentially arranged on the stretching rod in the upper radial offset reset groove, a plurality of fixing blocks are horizontally arranged in the upper radial offset reset groove, a spring plunger is arranged on each fixing block, one end of the spring plunger is propped against the fixing block, the other end of the spring plunger is propped against the stress sleeve, and the plurality of spring plungers encircle the stretching rod and fix the stretching rod at the center; the stretching rod passes through the middle connecting seat and the oil cylinder, is arranged in the middle connecting seat, is designed in a vertically penetrating way at the center of the middle connecting seat, is provided with a group of piston return springs at the top end of the inner part, is provided with a piston right below the piston return springs, is inserted and fixed in the oil cylinder at the bottom end of the piston, and is connected and fixed with an oil filling port on the front side wall of the oil cylinder; the piston is designed to be through up and down at the inner center, an offset load pad is arranged in the piston, an offset load lock nut is arranged on the offset load pad, and the offset load lock nut is locked into a whole through bolts and a stretching rod on the side face; the bottom end of the stretching rod is connected with a stretching head inside the base; a lower radial offset reset groove is designed at the joint of the top of the base and the oil cylinder, a stress sleeve is arranged on the stretching head in a surrounding manner in the lower radial offset reset groove, a plurality of fixing blocks are horizontally arranged in the lower radial offset reset groove, a spring plunger is arranged on each fixing block, one end of the spring plunger is propped against the fixing block, the other end of the spring plunger is propped against the stress sleeve, and the stretching rod is surrounded by the plurality of spring plungers and is fixed at the center; the inner diameter of the center of the bottom end of the stretching head is provided with an internal thread; a poking sleeve is arranged around the stretching head at the lower half part of the stretching head, a circle of driving teeth are arranged on the periphery of the poking sleeve, and a nut clamping groove matched with the outer diameter of the nut is arranged at the bottom end of the poking sleeve; a gear box is fixed on the right side face of the base, the upper portion of the gear box is connected with a speed reducer II through a connecting shaft, and the top of the speed reducer II is connected with a servo motor II.
The top of the poking sleeve is fixed through a poking sleeve positioning spring, the top of the poking sleeve positioning spring is propped against the bottom end of the stress sleeve, and the bottom end of the poking sleeve positioning spring is propped against the top end face of the poking sleeve.
The oil cylinder is a single-acting oil cylinder, the top end of the inner part of the oil cylinder is provided with a return spring at the top of the piston.
The driven gear is of an inverted T-shaped design and is fixed in the driving cavity through the extrusion of the upper cover; the driving gear is provided with a horizontal pin shaft fixing waist-shaped groove, a pin shaft is arranged in the pin shaft fixing waist-shaped groove, and the stretching rod is fixed through the pin shaft.
The eccentric load pad is a fixed pad which is annularly arranged around the stretching rod, the bottom surface of the fixed pad is horizontally arranged, the top of the fixed pad is spherical and is matched with the eccentric load pad, the eccentric load lock nut at the top of the eccentric load pad is also annularly arranged, and the bottom shape of the eccentric load lock nut is also spherical and is matched with the eccentric load pad.
Three fixing blocks are horizontally arranged in the upper radial offset reset groove, each fixing block is provided with a spring plunger, and the three fixing blocks and the three spring plungers are uniformly distributed around the stretching rod; five fixed blocks are horizontally arranged in the lower radial offset reset groove, a spring plunger is arranged on each fixed block, and the five fixed blocks and the five spring plungers are uniformly distributed around the stretching head.
The beneficial effects of the invention are as follows: according to the intelligent stretcher, through the design, the speed reducer I is driven by the servo motor I to drive the stretching rod to rotate, the stretching head at the top end of the stretching rod is fixed with the screw threads, meanwhile, oil is injected into the oil cylinder to push the piston upwards, the screw is pulled, the driving sleeve is matched with the nut, the speed reducer II is driven by the servo motor II, the driving teeth on the periphery of the driving sleeve are driven by the gear box, the nut is disassembled through the rotation of the driving sleeve, and in the disassembling process, the problem of deflection of the stretching rod caused by deflection of the screw is effectively prevented through the springs and the fixing blocks in the upper radial deflection reset groove and the lower radial deflection reset groove.
Drawings
FIG. 1 is a perspective view of the appearance structure of the present invention;
FIG. 2 is a schematic diagram of the present invention in a side view;
FIG. 3 is a schematic diagram I of the internal structure principle of the invention;
FIG. 4 is a schematic diagram II of the internal structure principle of the invention;
reference numerals: 1. the device comprises a servo motor I, 2, a speed reducer I, 3, an upper cover, 4, a servo motor II, 5, a speed reducer II, 6, a connecting shaft, 7, a gear box, 8, an oil filling port, 9, a driving part mounting base, 10, a driving cavity, 11, a driving gear, 12, a transition gear, 13, a driven gear, 14, a pin shaft fixing waist-shaped groove, 15, a pin shaft, 16, an upper radial offset reset groove, 17, a spring plunger, 18, a fixed block, 19, a stress sleeve, 20, a middle connecting seat, 21, a piston reset spring, 22, a stretching rod, 23, a piston, 24, a bias load pad, 25, a bias load lock nut, 26, an oil cylinder, 27, a shift sleeve positioning spring, 28, a stretching head, 29, an internal thread, 30, a shift sleeve, 31, a nut clamping groove, 32, a base, 33 and a lower radial offset reset groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description is presented by way of example only and is not intended to limit the invention.
The intelligent stretcher comprises a base 32, wherein the center of the base 32 is designed to be vertically transparent, an oil cylinder 26 is connected above the base 32, an oil filling port 8 is arranged on the front side surface of the oil cylinder 26, a middle connecting seat 20 is fixed on the upper side of the oil cylinder 26 through a peripheral bolt, the top of the middle connecting seat 20 is connected with an upper cover 3 through a bolt, a driving part mounting base 9 is arranged between the middle connecting seat 20 and the upper cover 3, and the driving part mounting base 9 is also connected with the upper cover 3 through a bolt; a driving cavity 10 is arranged at the top of the driving component mounting base 9, the driving cavity 10 is sealed by an upper cover 3, a driving gear 11, a transition gear 12 and a driven gear 13 are respectively and horizontally arranged in the driving cavity 10 from left to right, and the driven gear 13 is of an inverted T-shaped design and is fixed in the driving cavity 10 by extrusion of the upper cover 3; a horizontal pin shaft fixing waist-shaped groove 14 is arranged on the driving gear, a pin shaft 15 is arranged in the pin shaft fixing waist-shaped groove 14, and a stretching rod 22 is fixed through the pin shaft 15; the driving gear 11 is arranged at the top of the speed reducer I2 and is connected with the speed reducer I2, and a servo motor I1 is arranged below the speed reducer I2; a stretching rod 22 is vertically fixed on the driven gear 13, an upper radial offset reset groove 16 is arranged around the stretching rod 22 at the top of the middle connecting seat 20, a stress sleeve 19 is arranged around the stretching rod 22 in the upper radial offset reset groove 16, a plurality of fixing blocks 18 are horizontally arranged in the upper radial offset reset groove 16, a spring plunger 17 is arranged on each fixing block 18, one end of the spring plunger 17 is propped against the fixing block 18, the other end is propped against the stress sleeve 19, and the plurality of spring plungers 17 encircle the stretching rod 22 and fix the stretching rod 22 at the center;
the stretching rod 22 passes through the middle connecting seat 20 and the oil cylinder 26, is arranged in the middle connecting seat 20, is designed in a vertically penetrating way at the center of the middle connecting seat, is provided with a group of piston return springs 21 at the top end of the inner part, is provided with a piston 23 right below the piston return springs 21, and is fixedly inserted into the oil cylinder 26 at the bottom end of the piston 23, and the inner part of the oil cylinder 26 is fixedly connected with the oil filling port 8 on the front side wall; the piston 23 is designed to be vertically transparent at the inner center, an offset load pad 24 is arranged in the piston, an offset load lock nut 25 is arranged on the offset load pad 24, and the offset load lock nut 25 is locked into a whole through bolts on the side surfaces and the stretching rod 22;
inside the base 32, the bottom end of the stretching rod 22 is connected with a stretching head 28; a lower radial offset reset groove 33 is designed at the joint of the base 32 and the oil cylinder 26, a stress sleeve 19 is arranged on the stretching head in the lower radial offset reset groove 33 in a surrounding manner, a plurality of fixing blocks 18 are horizontally arranged in the lower radial offset reset groove 33, a spring plunger 17 is arranged on each fixing block 18, one end of the spring plunger 17 is propped against the fixing block 18, the other end is propped against the stress sleeve 19, and the plurality of spring plungers 17 encircle the stretching rod 22 and fix the stretching rod 22 at the center; the bottom end of the stretching head 28 is provided with an internal thread 29 at the inner diameter of the bottom end center, and the internal thread is in locking connection with an external screw rod; a shifting sleeve 30 is arranged around the stretching head 28 at the lower half part of the stretching head 28, a circle of driving teeth are arranged on the periphery of the shifting sleeve 30, a nut clamping groove 31 matched with the outer diameter of a nut is arranged at the bottom end of the shifting sleeve 30, and the nut clamping groove is used for clamping and fixing an external nut; a gear box 7 is fixed on the right side surface of the base 32, the upper part of the gear box 7 is connected with a speed reducer II 5 through a connecting shaft 6, and the top of the speed reducer II 5 is connected with a servo motor II 4.
Example 1: according to the invention, through the design, the speed reducer I2 is driven by the servo motor I1 to drive the stretching rod 22 to rotate, the stretching head 28 at the top end of the stretching rod 22 rotates and is in threaded fixation with an external screw rod, meanwhile, the piston 23 is pushed upwards to tighten the external screw rod by injecting oil into the oil cylinder 26, the speed reducer II 5 is driven by the servo motor II 4 through the cooperation of the shifting sleeve 30 and the external screw nut, and the driving teeth on the periphery of the shifting sleeve 30 are driven by the gear box 7, so that the shifting sleeve 30 rotates to disassemble or assemble the external screw nut.
Further, the oil cylinder 26 is a single-acting oil cylinder, a return spring 21 is arranged at the top of the piston at the inner top end of the oil cylinder, and after the piston is pushed upwards by the oil cylinder 26, the piston 23 automatically returns under the action of the return spring 21 after the pressure of the oil cylinder 26 is relieved.
In the process of disassembling or assembling the external nut, the top of the shifting sleeve 30 is fixed through a shifting sleeve positioning spring 27, the top of the shifting sleeve positioning spring 27 is propped against the bottom end of the stressed sleeve 30, the bottom end of the shifting sleeve positioning spring 27 is propped against the top end surface of the shifting sleeve 30, and the shifting sleeve positioning spring 27 is used for always controlling the shifting sleeve 30 to be under the stretching head 28, so that the external screw and the external nut can be conveniently fixed.
Example 2: on the basis of the implementation structure, in the process of disassembling or assembling the bolt, the problem of deflection of the stretching rod 22 caused by deflection of a screw rod is effectively prevented by the spring plungers 17 and the fixed blocks 18 in the upper radial deflection reset groove 16 and the lower radial deflection reset groove 33, three fixed blocks 18 are horizontally arranged in the upper radial deflection reset groove 16, one spring plunger 17 is arranged on each fixed block 18, and the three fixed blocks 18 and the three spring plungers 17 are uniformly distributed around the stretching rod 22; five fixing blocks 18 are horizontally arranged in the lower radial offset reset groove 33, one spring plunger 17 is arranged on each fixing block 18, the five fixing blocks 18 and the five spring plungers 17 are uniformly distributed around the stretching head, and the stretching rod 22 is jointly fixed to the center by the restraint of the spring plungers 17 and the fixing blocks 18 in the upper radial offset reset groove 16 and the spring plungers 17 and the fixing blocks 18 in the lower radial offset reset groove 33;
the eccentric load pad 24 is a fixed pad which is annularly arranged around the stretching rod 22, the bottom surface of the fixed pad is horizontally arranged, the top of the fixed pad is in a spherical surface and is matched with the eccentric load pad 24, the eccentric load lock nut 25 at the top of the eccentric load pad 24 is also in an annular shape, the bottom shape of the eccentric load lock nut 25 is also in a spherical surface and is matched with the eccentric load pad 24, when an external screw is inclined, the eccentric load lock nut 25 is restrained to always vertically run through the eccentric load pad 24, and the eccentric load lock nut 25 and the stretching rod are integrated, so that the eccentric load pad 24 always restrains the stretching rod from vertically moving, and abrasion of the stretching rod 22 and the piston 23 caused by the inclination of the external screw is prevented.
In conclusion, the intelligent stretcher is novel in structural design, simple in structure, capable of achieving stretching and fixing of a screw rod and disassembling and locking of a nut through two driving motors and one oil cylinder, capable of automatically completing whole-course actions, high in operation efficiency and capable of achieving an ideal intelligent stretcher.
Claims (1)
1. An intelligent stretcher, its includes a base, its characterized in that: the center of the base is designed to be through up and down, the upper side of the base is connected with an oil cylinder, the front side surface of the oil cylinder is provided with an oil filling port, a middle connecting seat is fixed above the oil cylinder through a peripheral bolt, the top of the middle connecting seat is connected with an upper cover through a bolt, and a driving part is arranged between the middle connecting seat and the upper cover to install the base; the top of the driving component mounting base is provided with a driving cavity, the driving cavity is sealed by an upper cover, a driving gear, a transition gear and a driven gear are respectively and horizontally arranged in the driving cavity from left to right, the driving gear is arranged at the top of a speed reducer I and is connected with the speed reducer I, and a servo motor I is arranged below the speed reducer I; a stretching rod is vertically fixed on the driven gear, an upper radial offset reset groove is formed around the stretching rod at the top of the middle connecting seat, a stress sleeve is circumferentially arranged on the stretching rod in the upper radial offset reset groove, a plurality of fixing blocks are horizontally arranged in the upper radial offset reset groove, a spring plunger is arranged on each fixing block, one end of the spring plunger is propped against the fixing block, the other end of the spring plunger is propped against the stress sleeve, and the plurality of spring plungers encircle the stretching rod and fix the stretching rod at the center; the stretching rod passes through the middle connecting seat and the oil cylinder, is arranged in the middle connecting seat, is designed in a vertically penetrating way at the center of the middle connecting seat, is provided with a group of piston return springs at the top end of the inner part, is provided with a piston right below the piston return springs, is inserted and fixed in the oil cylinder at the bottom end of the piston, and is connected and fixed with an oil filling port on the front side wall of the oil cylinder; the piston is designed to be through up and down at the inner center, an offset load pad is arranged in the piston, an offset load lock nut is arranged on the offset load pad, and the offset load lock nut is locked into a whole through bolts and a stretching rod on the side face; the bottom end of the stretching rod is connected with a stretching head inside the base; a lower radial offset reset groove is designed at the joint of the top of the base and the oil cylinder, a stress sleeve is arranged on the stretching head in a surrounding manner in the lower radial offset reset groove, a plurality of fixing blocks are horizontally arranged in the lower radial offset reset groove, a spring plunger is arranged on each fixing block, one end of the spring plunger is propped against the fixing block, the other end of the spring plunger is propped against the stress sleeve, and the stretching rod is surrounded by the plurality of spring plungers and is fixed at the center; the inner diameter of the center of the bottom end of the stretching head is provided with an internal thread; a poking sleeve is arranged around the stretching head at the lower half part of the stretching head, a circle of driving teeth are arranged on the periphery of the poking sleeve, and a nut clamping groove matched with the outer diameter of the nut is arranged at the bottom end of the poking sleeve; the right side surface of the base is fixedly provided with a gear box, the upper part of the gear box is connected with a speed reducer II through a connecting shaft, the top of the speed reducer II is connected with a servo motor II, the top of the shifting sleeve is fixed through a shifting sleeve positioning spring, the top of the shifting sleeve positioning spring is propped against the bottom end of the stress sleeve, the bottom end of the shifting sleeve positioning spring is propped against the top end surface of the shifting sleeve, the oil cylinder is a single-acting oil cylinder, the top end of the oil cylinder is internally provided with a reset spring, the top of the piston is provided with an inverted T-shaped design, and the driven gear is fixed in the driving cavity through upper cover extrusion; the driving gear is provided with a horizontal pin shaft fixing waist-shaped groove, a pin shaft is arranged in the pin shaft fixing waist-shaped groove, the stretching rod is fixed through the pin shaft, the offset load pad is a fixing pad which is annularly arranged around the stretching rod, the bottom surface of the offset load pad is horizontally arranged, the top of the offset load pad is arranged in a spherical shape and matched with the offset load pad, the offset load lock nut at the top of the offset load pad is also annularly arranged, the bottom end shape of the offset load lock nut is also in a spherical shape and matched with the offset load pad, three fixing blocks are horizontally arranged in the upper radial offset reset groove, and each fixing block is provided with a spring plunger, and the three fixing blocks and the three spring plungers are uniformly distributed around the stretching rod; five fixed blocks are horizontally arranged in the lower radial offset reset groove, a spring plunger is arranged on each fixed block, and the five fixed blocks and the five spring plungers are uniformly distributed around the stretching head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810773884.2A CN108705486B (en) | 2018-07-15 | 2018-07-15 | Intelligent stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810773884.2A CN108705486B (en) | 2018-07-15 | 2018-07-15 | Intelligent stretcher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108705486A CN108705486A (en) | 2018-10-26 |
| CN108705486B true CN108705486B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810773884.2A Active CN108705486B (en) | 2018-07-15 | 2018-07-15 | Intelligent stretcher |
Country Status (1)
| Country | Link |
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| CN (1) | CN108705486B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109623352A (en) * | 2018-12-20 | 2019-04-16 | 华中科技大学 | A kind of tools for bolts ' pretension device having high bonding strength characteristic |
| CN111618777A (en) * | 2020-04-26 | 2020-09-04 | 北京海泰斯工程设备股份有限公司 | Nut pre-tightening device |
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| CN105750897A (en) * | 2016-05-05 | 2016-07-13 | 哈尔滨工程大学 | Automatic nut tightening and returning mechanism with bolt stretching machine |
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| CN206677855U (en) * | 2017-04-12 | 2017-11-28 | 内蒙古久和能源装备有限公司 | Can automatic locking nut hydraulic elongator |
| CN208496894U (en) * | 2018-07-15 | 2019-02-15 | 德州德劲液压动力有限公司 | A kind of intelligence stretcher |
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| DE102004043146B3 (en) * | 2004-09-03 | 2005-11-24 | Hohmann, Jörg | Hydraulic bolt tensioning device |
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|---|---|---|---|---|
| GB9414297D0 (en) * | 1994-07-15 | 1994-09-07 | Hydra Tight Ltd | Hydraulic bolt tensioning arrangement |
| DE19746034A1 (en) * | 1996-10-21 | 1998-04-23 | Ntn Toyo Bearing Co Ltd | Self-tensioning belt drive for motor vehicle internal combustion engine |
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| CN105750897A (en) * | 2016-05-05 | 2016-07-13 | 哈尔滨工程大学 | Automatic nut tightening and returning mechanism with bolt stretching machine |
| CN106736480A (en) * | 2016-12-31 | 2017-05-31 | 马鞍山市三江机械有限公司 | A kind of hydraulic elongator and its drawing process |
| CN206677855U (en) * | 2017-04-12 | 2017-11-28 | 内蒙古久和能源装备有限公司 | Can automatic locking nut hydraulic elongator |
| CN208496894U (en) * | 2018-07-15 | 2019-02-15 | 德州德劲液压动力有限公司 | A kind of intelligence stretcher |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108705486A (en) | 2018-10-26 |
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