CN115122278A - Nut assembling and disassembling tool for pre-tightening bolt - Google Patents
Nut assembling and disassembling tool for pre-tightening bolt Download PDFInfo
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- CN115122278A CN115122278A CN202210769681.2A CN202210769681A CN115122278A CN 115122278 A CN115122278 A CN 115122278A CN 202210769681 A CN202210769681 A CN 202210769681A CN 115122278 A CN115122278 A CN 115122278A
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- duplicate gear
- driving
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- shaft
- nut
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- 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
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- 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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a nut assembling and disassembling tool for a pre-tightening bolt, which comprises a hydraulic bolt stretcher, a pressing wheel driving device, a pressing wheel lifting device and a pressing wheel transverse moving device, wherein the pressing wheel driving device is positioned outside one side of the hydraulic bolt stretcher and comprises a driving motor and a gearbox, the gearbox comprises a box body, a driving duplicate gear, a driven duplicate gear, a pressing wheel, a driving duplicate gear shaft, a driven duplicate gear shaft and a shifting fork mechanism, and the peripheral surface of the pressing wheel is provided with reticulate patterns. The pinch roller lifting device and the pinch roller transverse moving device are respectively positioned between the hydraulic bolt stretcher and the pinch roller driving device. The nut screwing device has a compact structure, is convenient and quick to use, remarkably reduces the labor intensity of screwing or unscrewing the nut from the pre-tightening bolt, improves the working efficiency, and ensures the safety of screwing or unscrewing the nut from the pre-tightening bolt.
Description
Technical Field
The invention relates to an assembling and disassembling tool, in particular to an assembling and disassembling tool for screwing or disassembling a nut on a bolt after the bolt is stretched to generate elastic deformation, and belongs to the technical field of mechanical tools.
Background
The pretension of bolt and nut is connected the comparatively common spare part connected mode of mechanical equipment, screws up the nut after making it produce elastic deformation through lengthening the bolt, can improve the reliability that bolt and nut connects effectively, improves locking performance, ensures product, spare part fixed connection's security, prevents to lead to equipment impaired because the nut is not hard up when using. At present, a hydraulic bolt stretcher is generally used for stretching a high-strength bolt in the assembling process, so that the high-strength bolt generates elastic deformation, a gap is generated between the bottom surface of a nut screwed on the high-strength bolt and an installation base surface, then a driving lever is manually inserted into a small round hole corresponding to the circumferential surface of the nut for many times to screw the nut again, the elastic deformation of the high-strength bolt disappears and the original length is recovered after the hydraulic bolt stretcher is unloaded, and the pre-tightening connection of the high-strength bolt and the nut is completed. When the nut on the pre-tightened high-strength bolt needs to be disassembled, the hydraulic bolt tensioner is used again to stretch the bolt again, so that a gap is generated between the bottom surface of the nut screwed on the high-strength bolt and the mounting base surface again, and then the nut is slowly unscrewed by the deflector rod again. The method for screwing or loosening the nut has low efficiency, and the arm strength of each person is different, so that the disassembling and assembling habits are different. In particular, when the nut is removed, plastic deformation occurs between the partially engaged threads, and it is difficult to unscrew the nut using the driver. The nut can only be knocked by a hammer, so that knocking marks appear on the nut, and certain potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a nut assembling and disassembling tool for a pre-tightening bolt, which is compact in structure and convenient to use.
The invention is realized by the following technical scheme:
a nut assembling and disassembling tool for a pre-tightening bolt comprises a hydraulic bolt stretcher, a pressing wheel driving device, a pressing wheel lifting device and a pressing wheel transverse moving device, the pressing wheel driving device is positioned outside one side of the hydraulic bolt stretcher and comprises a driving motor and a gearbox, the gearbox comprises a box body, a driving duplicate gear, a driven duplicate gear, a pinch roller, a driving duplicate gear shaft, a driven duplicate gear shaft and a shifting fork mechanism, the driving motor is vertically fixed on the upper side of the box body, the bottom of the box body is supported on one side of the bottom of the hydraulic bolt stretcher through a skeleton spring, one side of the box body adjacent to the window of the hydraulic bolt stretcher cylinder body is opened, a driving motor shaft is fixedly connected with the upper end of a driving duplicate gear shaft vertically supported in the box body through a torsion overload protection clutch, and an upper gear of the driving duplicate gear, one end of a shifting fork mechanism and a lower gear of the driving duplicate gear are sequentially sleeved and positioned on the middle part of the driving duplicate gear shaft from top to bottom; the driven dual gear upper gear, the pressing wheel and the driven dual gear lower gear are sequentially sleeved and positioned on the middle part of the driven dual gear shaft from top to bottom, and two ends of the driven dual gear shaft and the lower end of the driving dual gear shaft are supported in the box body through corresponding bearings respectively; the peripheral surface of the pressing wheel is provided with reticulate patterns; the pinch roller lifting device and the pinch roller transverse moving device are respectively positioned between the hydraulic bolt stretcher and the pinch roller driving device.
The object of the invention is further achieved by the following technical measures.
Furthermore, the number of teeth of the upper gear of the driving duplicate gear is greater than that of the upper gear of the driven duplicate gear, and the number of teeth of the lower gear of the driving duplicate gear is less than that of the lower gear of the driven duplicate gear; when the driving duplicate gear moves upwards to the right position, the lower gear of the driving duplicate gear is meshed with the lower gear of the driven duplicate gear, and the pinch roller rotates at a slow speed; when the driving duplicate gear moves down to the right position, the upper gear of the driving duplicate gear is meshed with the upper gear of the driven duplicate gear, and the pressing wheel rotates rapidly.
Furthermore, the cross section of the middle part of the driving duplicate gear shaft and the cross section of the middle part of the driven duplicate gear shaft are both square, the square central hole of the driving duplicate gear is in clearance fit with the middle part of the driving duplicate gear shaft, and the square central hole of the driven duplicate gear and the square central hole of the pinch roller are in clearance fit with the middle part of the driven duplicate gear shaft respectively.
Furthermore, the pinch roller lifting device comprises a dovetail block and a dovetail groove, the dovetail groove is vertically fixed on the top of the box body and is positioned between the driving motor and one side of the hydraulic bolt stretcher, and the dovetail block is embedded in the dovetail groove; the pinch roller traversing device is positioned between one side of the hydraulic bolt tensioner cylinder body and the dovetail block. The transverse moving device of the pinch roller comprises a transverse moving oil cylinder and a guide mechanism which is respectively positioned between four corners of the dovetail block and a cylinder body of the hydraulic bolt stretcher, the cylinder body of the transverse moving oil cylinder is a counter bore in the middle of one side of the cylinder body of the hydraulic bolt stretcher, a piston at one end of a piston rod extends into the counter bore and serves as a plug screw of a cylinder cover to seal the outer end of the counter bore, and the other end of the piston rod penetrates out of the plug screw and then is fixed to the center of the lower portion of the outer side of the dovetail block.
Furthermore, guiding mechanism includes sleeve, sliding shaft, spring and stop screw, sleeve one end is fixed respectively on hydraulic bolt elongator cylinder body and one side, and sliding shaft one end is fixed respectively on the dovetail block, and the sliding shaft other end stretches into in the sleeve other end, and the spring both ends are supported respectively and are leaned on sleeve bottom and sliding shaft other end, and stop screw passes on the middle part of the vertical twist sliding shaft of axial groove back at the sleeve other end.
Furthermore, the shifting fork mechanism comprises a step shaft sleeve, a shifting fork body and a vertical shaft, wherein a square center hole of the step shaft sleeve is arranged in the center of the step shaft sleeve and is in clearance fit with the middle part of the driving duplicate gear shaft, and two ends of the step shaft sleeve are respectively fixedly connected with an upper gear of the driving duplicate gear and a lower gear of the driving duplicate gear; the fork mouth of shift fork body one end inlays on the step axle sleeve neck, and the other pot head of shift fork body is on the vertical axis middle part, the vertical axis both ends support respectively on the last downside of box, and handle one end is articulated with the shift fork body other end, and the lift groove of box one side is worn out to the handle other end. A locking transverse groove is formed in the top end of the lifting groove; when the shifting fork body drives the driving duplicate gear to move upwards to the right position, the other end of the handle is embedded into the locking transverse groove to lock the driving duplicate gear. And a program switch of a driving motor is arranged on one side of the middle part of the lifting groove.
The hydraulic bolt tensioner is arranged beside one side of the hydraulic bolt tensioner, the pressing wheel is transversely abutted against the circumferential surface of the nut to be screwed or unscrewed, and the nut is driven to be screwed on the high-strength bolt elongated by the hydraulic bolt tensioner in a friction transmission mode or is dismounted from the elongated high-strength bolt. Meanwhile, a gearbox is adopted to carry out two-gear speed change, and the nut is screwed up by forward rotation with fast small torque and is unscrewed by reverse rotation with slow large torque by reversing the driving motor. And the pinch roller drives the gearbox and the driving motor to lift along with the up-and-down movement of the nut by utilizing the pinch roller lifting device with the dovetail block and dovetail groove structures. The structure is compact, the use is convenient and fast, the labor intensity of screwing or dismounting the nut from the pre-tightening bolt is obviously reduced, the working efficiency is improved, and the safety of screwing or dismounting the nut from the pre-tightening bolt is ensured.
Advantages and features of the invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of the construction of the tightening nut of the present invention;
FIG. 2 is a schematic view of the construction of the unscrewed nut of the present invention;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a right side view of FIG. 1;
FIG. 5 is an enlarged sectional view taken along line A-A of FIG. 1;
fig. 6 is a schematic view of the present invention for attaching and detaching a hexagonal nut.
Detailed Description
The invention is further described below with reference to the accompanying drawings and embodiments of the invention.
In the description of the present invention, terms indicating orientation or positional relationship such as "center", "upper", "lower", "left", "right", "inside", "outside", and the like are based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the device referred to must have a specific orientation.
As shown in fig. 1 to 4, the present embodiment includes a hydraulic bolt tensioner 1, a pressing wheel driving device 2, a pressing wheel lifting device 3 and a pressing wheel traversing device 4, the pressing wheel driving device 2 is located outside the right side of the hydraulic bolt tensioner 1, and includes a driving motor 21 and a transmission case 22, the transmission case 22 includes a case 23, a driving duplicate gear 24, a driven duplicate gear 25, a pressing wheel 26, a driving duplicate gear shaft 27, a driven duplicate gear shaft 28 and a shifting fork mechanism 29, the driving motor 21 is vertically fixed on the upper side of the case 23, and the bottom of the case 23 is supported on the right side of the bottom of the hydraulic bolt tensioner 1 through a skeleton spring 231, so as to facilitate the up-down movement and the reset of the pressing wheel 26. The right side of the box body 23 adjacent to the cylinder body window 11 of the hydraulic bolt stretcher is opened, and the driving motor shaft 211 is fixedly connected with the upper end of the driving duplicate gear shaft 27 vertically supported in the box body 23 through a torsion overload protection clutch 212, so that the driving motor 21 is prevented from being burnt out due to overlarge resistance torque in the process of assembling and disassembling the nut 20. The upper driving duplicate gear 241, the left end of the shifting fork mechanism 29 and the lower driving duplicate gear 242 are sequentially sleeved and positioned on the middle part of the driving duplicate gear shaft 27 from top to bottom. The driven dual gear upper gear 251, the pinch roller 26 and the driven dual gear lower gear 252 are sequentially sleeved and positioned on the middle part of the driven dual gear shaft 28 from top to bottom, and two ends of the driven dual gear shaft 28 and the lower end of the driving dual gear shaft 27 are respectively supported in the box body 23 through corresponding bearings 271. The outer peripheral surface of the pinch roller 26 is provided with the reticulation 261, so that the friction transmission force between the pinch roller 26 and the nut 20 is increased.
The number of teeth of the driving duplicate gear upper gear 241 is greater than the number of teeth of the driven duplicate gear upper gear 251, and the number of teeth of the driving duplicate gear lower gear 242 is less than the number of teeth of the driven duplicate gear lower gear 252. When the driving duplicate gear 24 moves upwards to a certain position, the driving duplicate gear lower gear 242 is meshed with the driven duplicate gear lower gear 52, the transmission ratio i is 1.5-2.0, and the pressing wheel 26 rotates at a low speed and is used for unscrewing the nut 10; when the driving duplicate gear 24 moves down to the right position, the driving duplicate gear upper gear 241 is meshed with the driven duplicate gear upper gear 251, and the pressing wheel 26 rotates fast at the transmission ratio i of 0.5-1.0 at the moment to be used for screwing the nut 10.
As shown in fig. 5, the cross section of the middle of the driving duplicate gear shaft 27 and the middle of the driven duplicate gear shaft 28 are both square, the square central hole 2411 of the driving duplicate gear is in clearance fit with the middle of the driving duplicate gear shaft 27, and the square central hole 2511 of the driven duplicate gear and the square central hole 2611 of the pressing wheel are in clearance fit with the middle of the driven duplicate gear shaft 28 respectively, so that the structure is convenient for the driving duplicate gear 24 to move up and down during gear shifting.
The pinch roller lifting device 3 and the pinch roller transverse moving device 4 are respectively positioned between the hydraulic bolt tensioner 1 and the pinch roller driving device 2. The pinch roller lifting device 3 comprises a dovetail block 31 and a dovetail groove 32, the dovetail groove 32 is vertically fixed on the top of the box body 23 and is positioned between the driving motor 21 and the right side of the hydraulic bolt stretcher 1, and the dovetail block 31 is embedded in the dovetail groove 32.
The pressing wheel traversing device 4 is positioned between the right side of the hydraulic bolt stretcher cylinder body 11 and the dovetail block 31 and comprises a traversing oil cylinder 41 and a guide mechanism 42 respectively positioned between four corners of the dovetail block 31 and the hydraulic bolt stretcher cylinder body 11, the cylinder body of the traversing oil cylinder 41 is a counter bore 411 in the middle of the right side of the hydraulic bolt stretcher cylinder body 11, a piston 413 at the left end of a piston rod 412 extends into the counter bore 411, a plug screw 43 serving as a cylinder cover seals the outer end of the counter bore 411, and the right end of the piston rod 412 penetrates through the plug screw 43 and then is fixed on the center of the lower part of the outer side of the dovetail block 31.
The guide mechanism 42 comprises a sleeve 421, a sliding shaft 422, a spring 423 and a limit screw 424, the left end of the sleeve 421 is fixed on the right side of the hydraulic bolt tensioner cylinder 11, the right end of the sliding shaft 422 is fixed on the dovetail block 31, the left end of the sliding shaft 422 extends into the right end of the sleeve 421, the two ends of the spring 423 are abutted against the bottom of the sleeve 421 and the end of the left end of the sliding shaft 422, and the limit screw 424 penetrates through an axial groove 4211 in the right end of the sleeve 421 and then is vertically screwed into the middle of the sliding shaft 422. The guide mechanisms 42 at the four corners of the dovetail block 31 play a precise guiding role in the transverse movement of the driving motor 21 and the gearbox 22, so that the pressing wheel 26 pressed on the nut 10 cannot move vertically, and the pressing wheel 26 is ensured to screw or unscrew the nut 10 through friction transmission.
As shown in fig. 1, fig. 2, fig. 4 and fig. 5, the shifting fork mechanism 29 includes a stepped shaft sleeve 291, a shifting fork body 292 and a vertical shaft 293, a stepped shaft sleeve square central hole 2911 in clearance fit with the middle part of the driving duplicate gear shaft 27 is arranged in the center of the stepped shaft sleeve 291, and two ends of the stepped shaft sleeve 291 are respectively fixedly connected with the driving duplicate gear upper gear 241 and the driving duplicate gear lower gear 242. The fork opening at the left end of the shifting fork body 292 is embedded on the neck part of the step shaft sleeve 291, the right end of the shifting fork body 292 is sleeved on the middle part of the vertical shaft 293, and the two are in clearance fit. Two ends of the vertical shaft 293 are respectively supported on the upper side and the lower side of the box body 23, the left end of the handle 294 is hinged with the right end of the shifting fork body 292, and the left end of the handle 294 penetrates through the lifting groove 232 on one side of the box body 23. The top end of the lifting groove 231 is provided with a locking transverse groove 233. When the shifting fork body 292 drives the driving duplicate gear 24 to move upwards to a certain position, the right end of the handle 294 is embedded into the locking transverse groove 233 to lock the meshing of the driving duplicate gear 24 and the driven duplicate gear 25.
A drive motor program switch 5 is arranged on one side of the middle part of the lifting groove 232, the drive motor program switch 5 is triggered by the upward movement or falling of the handle 294, and when the handle 294 moves upward to trigger the drive motor program switch 5, a lower gear signal of the gearbox 2 is transmitted to indicate that the gearbox is in a slow gear for unscrewing the nut 10. After the drive motor start switch is pressed at this time, the pinch roller 26 can only drive the nut 19 to rotate anticlockwise to tighten the nut 10. When the handle 294 is moved downwards to trigger the driving motor program switch 5, the gear-up signal of the gear box 2 is transmitted to indicate that the gear is at the fast speed for tightening the nut 10. After the driving motor starting switch is pressed down, the pressing wheel 26 can only drive the nut 19 to rotate clockwise to tighten the nut 10, and the use safety of the invention is ensured.
Fig. 6 shows that when the nut 10 is a hexagonal nut, the nut 10 can be tightened or loosened by using the present invention after a sleeve 101 having a hexagonal inner hole 102 matching the outer peripheral surface of the hexagonal nut is fitted.
The using process of the invention is as follows:
the a-nut 10 is tightened on the elongated high strength bolt 20
A1) The nut 10 is screwed on the high-strength bolt 20 firstly until the bottom surface of the nut 10 abuts against the installation base surface 30, then the hydraulic bolt tensioner 1 is installed on the end head of the high-strength bolt 20, the hydraulic bolt tensioner 1 is started, the high-strength bolt 20 is lengthened under the action of 1700 Mpa-1500 Mpa ultrahigh-pressure hydraulic oil of the hydraulic bolt tensioner until a gap L1 appears between the bottom surface of the nut and the installation base surface 30, and at the moment, the external oil pump stops pressurizing and keeps pressure.
A2) And starting the pressing wheel transverse moving device 4, pressing a forward button of the transverse moving cylinder 41, reversing a corresponding electromagnetic valve to inject high-pressure oil into the transverse moving cylinder 41, pushing the movable piston rod 412 to move left, and driving the pressing wheel driving device 2, the pressing wheel lifting device 3 and the pressing wheel transverse moving device 4 to move left, so that the pressing wheel 26 is pressed on the outer side of the nut 10.
A3) And (3) determining a quick gear of the gearbox 22, moving the handle 294 downwards, engaging the driving duplicate gear upper gear 241 with the driven duplicate gear upper gear 251, and quickly rotating the pressing wheel 26 to drive the nut 10 to rotate clockwise until the clearance L1 is eliminated to finish the pre-tightening of the nut 10. Simultaneously, the pinch roller 26, the pinch roller drive unit 2, and the pinch-roller traverse unit 4 descend along the dovetail groove 32 of the pinch roller lift unit 3.
A4) When a retreating button of the transverse moving oil cylinder 41 is pressed, high-pressure oil is injected into the transverse moving oil cylinder 41 by the corresponding electromagnetic valve in a reversing way, the movable piston rod 412 is pushed to move right, and the pressing wheel driving device 2, the pressing wheel lifting device 3 and the pressing wheel transverse moving device 4 are driven to move right, so that the pressing wheel 26 is separated from the nut 10.
B removing the nut 10 tightened to the elongated high-strength bolt 20
B1) The hydraulic bolt tensioner 1 is installed on the end of the high-strength bolt 20, the hydraulic bolt tensioner 1 is started, the high-strength bolt 20 is lengthened under the action of 1700-1500 Mpa ultrahigh-pressure hydraulic oil of the hydraulic bolt tensioner until a gap L1 appears between the bottom surface of the nut and the installation base surface 30, and at the moment, the external oil pump stops pressurizing and maintains pressure.
B2) Repeating the action of step a2) to press the pinch roller 26 against the outside of the nut 10.
B3) Determines the slow gear position of the gearbox 22, moves the handle 294 upwards and locks the handle 294 in the locking cross slot 233. The lower gear 242 of the driving duplicate gear is meshed with the lower gear 252 of the driven duplicate gear, the pressing wheel 26 rotates slowly to drive the nut 10 to rotate anticlockwise, the nut 10 moves upwards, and meanwhile, the pressing wheel 26, the pressing wheel driving device 2 and the pressing and pressing wheel transverse moving device 4 move upwards along the dovetail groove 32 of the pressing wheel lifting device 3, and therefore the nut 10 is unscrewed.
B4) Repeating a4) action, the pinch roller 26 disengages the nut 10.
In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.
Claims (10)
1. The nut assembling and disassembling tool for the pre-tightening bolt comprises a hydraulic bolt stretcher, and is characterized by further comprising a pressing wheel driving device, a pressing wheel lifting device and a pressing wheel transverse moving device, wherein the pressing wheel driving device is located outside one side of the hydraulic bolt stretcher and comprises a driving motor and a gearbox, the gearbox comprises a box body, a driving duplicate gear, a driven duplicate gear, a pressing wheel, a driving duplicate gear shaft, a driven duplicate gear shaft and a shifting fork mechanism, the driving motor is vertically fixed on the upper side of the box body, the bottom of the box body is supported on one side of the bottom of the hydraulic bolt stretcher through a framework spring, one side of the box body adjacent to a cylinder window of the hydraulic bolt stretcher is open, a driving motor shaft is fixedly connected with the upper end of the driving duplicate gear shaft vertically supported in the box body through a torsion overload protection clutch, and an upper gear of the driving duplicate gear, one end of the shifting fork mechanism and a lower gear of the driving duplicate gear are sequentially sleeved and positioned on the driving duplicate gear shaft from top to bottom The middle part of the wheel shaft; the driven dual gear upper gear, the pressing wheel and the driven dual gear lower gear are sequentially sleeved and positioned on the middle part of the driven dual gear shaft from top to bottom, and two ends of the driven dual gear shaft and the lower end of the driving dual gear shaft are supported in the box body through corresponding bearings respectively; the pinch roller lifting device and the pinch roller transverse moving device are respectively positioned between the hydraulic bolt stretcher and the pinch roller driving device.
2. The nut assembling and disassembling tool for the pre-tightening bolt according to claim 1, wherein the number of teeth of the upper gear of the driving duplicate gear is greater than that of the upper gear of the driven duplicate gear, and the number of teeth of the lower gear of the driving duplicate gear is less than that of the lower gear of the driven duplicate gear; when the driving duplicate gear moves upwards to the right position, the lower gear of the driving duplicate gear is meshed with the lower gear of the driven duplicate gear, and the pinch roller rotates at a slow speed; when the driving duplicate gear moves down to the right position, the upper gear of the driving duplicate gear is meshed with the upper gear of the driven duplicate gear, and the pressing wheel rotates rapidly.
3. The nut mounting and dismounting tool for the pre-tightening bolt according to claim 1, wherein the cross section of the middle part of the driving duplicate gear shaft and the cross section of the middle part of the driven duplicate gear shaft are both square, the square central hole of the driving duplicate gear shaft is in clearance fit with the middle part of the driving duplicate gear shaft, and the square central hole of the driven duplicate gear shaft and the square central hole of the pressing wheel are in clearance fit with the middle part of the driven duplicate gear shaft respectively.
4. The nut assembling and disassembling tool for the pre-tightening bolt according to claim 1, wherein the pressing wheel lifting device comprises a dovetail block and a dovetail groove, the dovetail groove is vertically fixed on the top of the box body and is positioned between the driving motor and one side of the hydraulic bolt tensioner, and the dovetail block is embedded in the dovetail groove; the pinch roller traversing device is positioned between one side of the hydraulic bolt tensioner cylinder body and the dovetail block.
5. The nut assembling and disassembling tool for the pre-tightening bolt as claimed in claim 4, wherein the transverse moving device of the pinch roller comprises a transverse moving oil cylinder and a guide mechanism respectively arranged between four corners of the dovetail block and a hydraulic bolt stretcher cylinder body, the hydraulic bolt stretcher cylinder body is a counter bore in the middle of one side of the hydraulic bolt stretcher cylinder body, a piston at one end of a piston rod extends into the counter bore to serve as a plug screw of a cylinder cover to seal the outer end of the counter bore, and the other end of the piston rod penetrates through the plug screw and then is fixed on the center of the lower portion of the outer side of the dovetail block.
6. The nut fitting and removing tool for the pre-tightening bolt according to claim 5, wherein the guide mechanism includes a sleeve, a sliding shaft, a spring, and a limit screw, one end of the sleeve is fixed to one side of the cylinder body of the hydraulic bolt tensioner, one end of the sliding shaft is fixed to the dovetail block, the other end of the sliding shaft extends into the other end of the sleeve, both ends of the spring abut against the bottom of the sleeve and the other end of the sliding shaft, respectively, and the limit screw is vertically screwed into the middle of the sliding shaft after passing through the axial groove of the other end of the sleeve.
7. The nut assembling and disassembling tool for the pre-tightening bolt according to claim 1, wherein the shifting fork mechanism includes a stepped shaft sleeve, a shifting fork body and a vertical shaft, a square central hole of the stepped shaft sleeve which is in clearance fit with the middle part of the driving duplicate gear shaft is formed in the center of the stepped shaft sleeve, and two ends of the stepped shaft sleeve are fixedly connected with the upper gear of the driving duplicate gear and the lower gear of the driving duplicate gear respectively; the fork mouth of shift fork body one end inlays on the step axle sleeve neck, and the other pot head of shift fork body is on the vertical axis middle part, the vertical axis both ends support respectively on the last downside of box, and handle one end is articulated with the shift fork body other end, and the lift groove of box one side is worn out to the handle other end.
8. The nut fitting and removing tool for a prefastened bolt according to claim 7, wherein a locking cross groove is formed at the top end of the lifting groove; when the shifting fork body drives the driving duplicate gear to move upwards to the right position, the other end of the handle is embedded into the locking transverse groove to lock the driving duplicate gear.
9. The nut fitting and removing tool for the pre-tightening bolt according to claim 7, wherein a program switch of a driving motor is installed on one side of the middle portion of the lifting groove.
10. The nut fitting and removing tool for a prefastened bolt according to claim 1, wherein a cross-hatched pattern is formed on the outer peripheral surface of the pinch roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210769681.2A CN115122278A (en) | 2022-06-30 | 2022-06-30 | Nut assembling and disassembling tool for pre-tightening bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210769681.2A CN115122278A (en) | 2022-06-30 | 2022-06-30 | Nut assembling and disassembling tool for pre-tightening bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115122278A true CN115122278A (en) | 2022-09-30 |
Family
ID=83381581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210769681.2A Pending CN115122278A (en) | 2022-06-30 | 2022-06-30 | Nut assembling and disassembling tool for pre-tightening bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115122278A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115318482A (en) * | 2022-10-13 | 2022-11-11 | 南通美光汽车用品有限公司 | Pneumatic liquid filling machine feeding volume adjustment mechanism is used in production of car wax polish |
| CN115488627A (en) * | 2022-10-20 | 2022-12-20 | 国网河南省电力公司平顶山供电公司 | Bolt dismounting device and method |
-
2022
- 2022-06-30 CN CN202210769681.2A patent/CN115122278A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115318482A (en) * | 2022-10-13 | 2022-11-11 | 南通美光汽车用品有限公司 | Pneumatic liquid filling machine feeding volume adjustment mechanism is used in production of car wax polish |
| CN115488627A (en) * | 2022-10-20 | 2022-12-20 | 国网河南省电力公司平顶山供电公司 | Bolt dismounting device and method |
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