CN110977873B - Stud bolt mounting tool and use method thereof - Google Patents
Stud bolt mounting tool and use method thereof Download PDFInfo
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- CN110977873B CN110977873B CN201911325904.0A CN201911325904A CN110977873B CN 110977873 B CN110977873 B CN 110977873B CN 201911325904 A CN201911325904 A CN 201911325904A CN 110977873 B CN110977873 B CN 110977873B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- 238000009434 installation Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 44
- 238000012544 monitoring process Methods 0.000 claims description 21
- 125000006850 spacer group Chemical group 0.000 claims 2
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 238000011900 installation process Methods 0.000 abstract description 8
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 238000003466 welding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- B25B27/143—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 for installing wire thread inserts or tubular threaded inserts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses a stud bolt installation tool and a using method thereof, and belongs to the technical field of bolt assembly. The torque wrench comprises a torque wrench body, a torque connecting device, a torque transmitting device, two limiting pins, a conversion head embedded in the torque transmitting device, a limiting internal threaded hole matched with a stud bolt and arranged in the center of the conversion head, a first pin hole and a third pin hole arranged on the side wall of the torque transmitting device, a second pin hole and a fourth pin hole arranged on the side wall of the conversion head, and a limiting pin penetrating through the side walls of the torque transmitting device and the conversion head through the first pin hole and the second pin hole but not penetrating through the limiting internal threaded hole, and a torque transmitting device and the conversion head are pinned; another stop pin is pinned to the torque transmitting device and the adapter in the same manner through the third pin bore and the fourth pin bore. The stud bolt mounting tool provided by the invention is simple and easy to operate, and is suitable for assembling stud bolts with different specifications; the torsion value generated in the installation process can be monitored, and the screw thread cannot be damaged due to overlarge torsion.
Description
Technical Field
The invention relates to the technical field of bolt assembly, in particular to a stud bolt installation tool and a using method thereof.
Background
Stud bolts, also known as studs or studs. The screw rod is used for connecting a fixed link function of a machine, the two ends of the stud bolt are provided with threads, and the middle screw rod is thick and thin. The method is generally used for mining machinery, bridges, automobiles, motorcycles, boiler steel structures, hanging towers, large-span steel structures, large-scale buildings and the like. When the stud is installed, one end of the bolt is screwed into the threaded hole, and the other end of the bolt is screwed into the threaded hole on the other side, and the stud is not provided with a locking device, so that the fastening is ensured by only relying on the friction coefficient between threads, and a special screwing device is needed in the installation process to realize the screwing.
At present, the Chinese patent application with the application number of 20180247687.2 discloses a simple stud bolt installation tool, provides a simple stud bolt installation tool which is not easy to slip in the process of installing a stud bolt, solves the problem of easy slip in the process of installing the stud bolt, but cannot be suitable for stud bolts with different diameters, has limited application range, cannot monitor torsion values generated in the installation process in real time, and can damage screw threads and easily cause the stud bolt to slip if the torsion is too large in the installation process; if the torque force is too small, the bolt may be loosened.
The chinese patent application with application number 201910202071.2 discloses a double-end double-attachment fastener, which realizes the fastening effect on a panel through the combined action of a flange nut and a welding mode, and the fastening effect is good, but the nut is required to be screwed by an external wrench in a matched manner, so that the welding is realized by connecting an electric welding component, the welding degree is difficult to control, and the operation is complex and inconvenient. It would be desirable to provide a simple stud attachment tool and method of use.
Disclosure of Invention
Aiming at the problems and the defects existing in the prior art, the invention provides the stud bolt installation tool and the use method thereof, so that the stud bolt installation tool can be used for assembling double-head bolts with different diameters through quick replacement of the conversion head, is simple to operate, achieves a good fastening effect through monitoring the torsion value, and can not damage external threads of the stud bolts.
As a first aspect of the present invention, there is provided a stud bolt mounting tool, comprising a torque wrench, a torque connection device, a torque transmission device, the torque connection device being fixedly connected with the torque transmission device to form a torque transmission mechanism, and two limit pins, wherein a replaceable conversion head is embedded in the torque transmission device, a limit internal threaded hole matched with the stud bolt is formed in the center of the conversion head, a first pin hole and a third pin hole are formed in the side wall of the torque transmission device, a second pin hole and a fourth pin hole are formed in the side wall of the conversion head, one limit pin penetrates through the side walls of the torque transmission device and the conversion head through the first pin hole and the second pin hole, but does not penetrate through the limit internal threaded hole, in other words, the diameter size of the limit pin is smaller than the wall thickness of the conversion head, and the torque transmission device and the conversion head are pinned; likewise, another stop pin penetrates the side walls of the torque transmitting device and the converter head through the third pin hole and the fourth pin hole, but does not penetrate the stop internally threaded hole, pinning the torque transmitting device and the converter head.
In one embodiment, the torque wrench is snap-connected to a torque connection.
In one embodiment, a square hole is formed in the center of the top end of the torque connecting device, at least one clamping groove is formed in each side of the inner side wall of the square hole, a square connector anastomotic with the square hole is arranged at one end of the torque wrench, and a buckle matched with the clamping groove is arranged on the side wall of the square connector, so that the torque wrench is connected with the torque connecting device in a buckling mode.
In one embodiment, the clasp is retractable.
In one embodiment, a button is arranged at the upper end of the square connector, the buckle can be contracted by pressing the button, and the torque wrench is taken down.
Further, a torque value monitoring window is arranged on the side face of the torque wrench, and the torque value monitoring window is connected with one end, provided with the square connector, of the torque wrench through the torque sensing device.
Preferably, the limiting pin is a cylindrical pin with a grip at one end.
As a second aspect of the present invention, there is provided a method of using a stud bolt mounting tool, comprising the steps of:
step 1: the torque transmission mechanism is formed by connecting a torque connecting device and a torque transmission device through bolts;
step 2: selecting a conversion head matched with the stud bolt, aligning a first pin hole with a second pin hole, aligning a third pin hole with a fourth pin hole, using one limiting pin to penetrate through the first pin hole and the second pin hole, using the other limiting pin to penetrate through the third pin hole and the fourth pin hole, and jointly pinning the conversion head and the torque transmission device by the two limiting pins;
step 3: one end of the stud is screwed into a limiting internal threaded hole of the conversion head, so that the top end of the stud is propped against the bottom of the torque connecting device, and limiting is completed;
step 4: the torque wrench is buckled and connected with the torque connecting device,
step 5: twisting the torque wrench, screwing the other end of the stud into a part to complete assembly, and recording the numerical value of a torque value monitoring window to complete monitoring;
step 6: reversely rotating the torque wrench to take down the torque transmission mechanism;
step 7: pressing a button at the upper end of the torque wrench connector to take down the torque wrench;
step 8: when the stud bolts with other specifications are fixed, only the two limiting pins are pulled out by holding the limiting pin grippers, the conversion heads matched with the stud bolts are replaced, and then the steps 5-7 are repeated.
The method can also comprise the following steps:
and according to the torsion values required by tightening the stud bolts with different specifications, presetting a torsion maximum value through a torsion value monitoring window.
Compared with the prior art, the invention has the beneficial effects that:
1. the stud bolt mounting tool provided by the invention can be used for rapidly replacing the conversion head by pulling out the limiting pin, is suitable for assembling stud bolts with different specifications, and has a wide application range.
2. The stud bolt installation tool provided by the invention can monitor the torsion value generated in the installation process in real time, so that the screw thread cannot be damaged due to overlarge torsion in the installation process, and the screw bolt is loosened due to overlarge torsion.
3. According to the stud bolt mounting tool provided by the invention, the maximum torsion value can be preset in the torsion value monitoring window according to different stud bolt specifications, and when the applied torsion exceeds the maximum torsion value, the mounting tool can not only self-protect but also can not apply force, and the stud bolt can be ensured not to be damaged.
4. The stud bolt installation tool provided by the invention is simple in use method and easy to operate, and an external wrench is not needed.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
fig. 1 is a schematic structural view of a stud bolt installation tool according to an embodiment of the present invention.
FIG. 2A is a schematic bottom view of a torque transmitting mechanism according to an embodiment of the present invention.
FIG. 2B is a schematic diagram of a torque transmitting mechanism according to an embodiment of the present invention.
FIG. 2C is a schematic top view of a torque transmitting mechanism according to an embodiment of the present invention.
FIG. 3A is a schematic view of the structure of FIG. 2C along the line E-E.
FIG. 3B is a schematic view of the structure of FIG. 2C along the H-H section.
Fig. 4 is a schematic top view of a stud attachment tool according to an embodiment of the present invention.
Fig. 5 is a schematic view of the structure of fig. 4 along the D-D section.
FIG. 6 is a schematic view of the structure of FIG. 4 along the line F-F.
Reference numerals: 1-torque transmission device, 2-torque connection device, 3-bolt, 4-part, 5-torque wrench, 6-button, 7-conversion head, 8-spacer pin, 9-stud, 10-torque value monitoring window, 11-square connector, 12-clip, 13-slot, 16-spacing internal thread hole, 17-square hole, 18-junction, 19-first pin hole, 20-third pin hole, 21-second pin hole, 22-fourth pin hole 101-torque transmission mechanism, 102-torque sensing device.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the protection of the invention.
The invention is further described below with reference to specific examples and figures. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Example 1
As shown in fig. 1, the stud bolt installation tool in the embodiment of the invention comprises a torque wrench 5, a torque connection device 2, a torque transmission device 1, wherein the torque wrench 5 is connected with the torque connection device 2, the torque connection device 2 and the torque transmission device 1 are fixedly connected through 3 bolts 3 to form a torque transmission mechanism 101, the bolts 3 are equidistantly distributed on the surface of the torque connection device 2 to form a regular triangle, and the outer contour of the torque transmission mechanism 101 is a cylinder.
Referring to fig. 4, 5 and 6, the stud bolt installation tool in the present embodiment further includes a limit pin 8, where one end of the limit pin 8 is provided with a grip; as shown in fig. 2 and 3, the side wall of the torque transmission device 1 is provided with a first pin hole 19 and a third pin hole 20, a quickly replaceable conversion head 7 is embedded in the torque transmission device 1, a limit internal threaded hole 16 matched with the stud 9 is arranged in the conversion head 7, the side wall of the conversion head 7 is provided with a second pin hole 21 and a fourth pin hole 22, wherein one limit pin 8 penetrates through the side walls of the torque transmission device 1 and the conversion head 7 through the first pin hole 19 and the second pin hole 21, but does not penetrate through the limit internal threaded hole 16, in other words, the diameter size of the cross section of the limit pin 8 is smaller than the wall thickness of the conversion head 7, and the torque transmission device 1 and the conversion head 7 are pinned; likewise, the other stop pin 8 penetrates the side walls of the torque transmission device 1 and the conversion head 7 through the third pin hole 20 and the fourth pin hole 22, but does not penetrate the stop internally threaded hole 16, pinning the torque transmission device 1 and the conversion head 7.
See fig. 3, 5 and 6, wherein the torque wrench 5 is snap-connected with the torque connection means 2. Referring to fig. 2, 3 and 5, a square hole 17 is formed in the center of the top end of the torque connection device 2, a clamping groove 13 is formed in each side of the inner side wall of the square hole 17, a square connection head 11 anastomotic to the square hole is arranged at one end of the torque wrench 5, and a buckle 12 matched with the clamping groove 13 is arranged on the side wall of the square connection head 11, so that the torque wrench buckle is connected with the torque fixed connection device. For the convenience of disassembling the torque wrench 5, the buckle 12 in this embodiment is telescopic, and the button 6 drives the buckle 12 to shrink by pressing the button 6 arranged at the upper end of the square connector 11, so as to take down the torque wrench 5.
Referring to fig. 1 and 3, a torque value monitoring window 10 is provided on the side of the torque wrench 5, the torque value monitoring window 10 is connected with one end of the torque wrench 5 provided with a square connector 11 through a torque sensing device 102, and the force application condition can be monitored in real time during the installation process of the stud; the torque value can be preset according to the requirement before the stud is installed, when the preset torque value is reached, the upper end connection part 18 of the square connector 11 slips, and the torque spanner 5 cannot be applied with force, so that the screw cannot be damaged due to overlarge torque in the installation process.
Example 2
The present embodiment provides a method for using a stud bolt installation tool, which is applied to the device described in the above embodiment 1, and includes:
step 1: the torque transmission mechanism 101 is formed by connecting the torque connecting device 2 and the torque transmission device 1 through bolts 3;
step 2: selecting a conversion head 7 matched with the stud 9, aligning the first pin hole 19 with the second pin hole 21, aligning the third pin hole 20 with the fourth pin hole 22, using one of the limit pins 8 to pass through the first pin hole 19 and the second pin hole 21, and the other limit pin 8 to pass through the third pin hole 20 and the fourth pin hole 22, and jointly pinning the limit conversion head 7 and the torque transmission device 1 by the two limit pins 8;
step 3: one end of the M12 stud bolt 9 is screwed into a depth limiting internal threaded hole 16 of the conversion head 7, so that the top end of the double-head stud bolt 9 props against the bottom of the torque connecting device 2, and limiting is completed;
step 4: the torque wrench 5 is in buckling connection with the torque connecting device 2;
step 5: twisting the torque wrench 5, screwing the other end of the M12 stud bolt 9 into the part 4 to complete assembly, and recording the numerical value of the torque value monitoring window 10 to complete monitoring;
step 6: reverse rotating the torque wrench 5 to remove the torque transmission mechanism 101;
in an embodiment of the present invention, the method may further include:
after the M12 stud is assembled, the M6 stud still needs to be assembled, and only the two limit pins are pulled out by the grippers holding the limit pins 8, so that the conversion head 7 matched with the M6 stud 9 can be quickly replaced, and the steps 5-6 are continuously repeated.
In an embodiment of the present invention, the method may further include:
when the stud bolt mounting tool is not used for a long time, the button 6 at the upper end of the square connector 11 of the torque wrench 5 is pressed, and the torque wrench 5 is taken down and stored in the tool box.
Example 3
The present embodiment provides another method for using a stud bolt installation tool, which is applied to the apparatus described in the above embodiment 1, and includes:
step 1: the torque transmission mechanism 101 is formed by connecting the torque connecting device 2 and the torque transmission device 1 through bolts 3;
step 2: selecting a conversion head 7 matched with the stud 9, aligning the first pin hole 19 with the second pin hole 21, aligning the third pin hole 20 with the fourth pin hole 22, using one of the limit pins 8 to pass through the first pin hole 19 and the second pin hole 21, and the other limit pin 8 to pass through the third pin hole 20 and the fourth pin hole 22, and jointly pinning the limit conversion head 7 and the torque transmission device 1 by the two limit pins 8;
step 3: one end of the M6 stud bolt 9 is screwed into the depth limiting internal threaded hole 16 of the conversion head 7, so that the top end of the stud bolt 9 props against the bottom of the torque connecting device 2, and limiting is completed;
step 4: the torque wrench 5 is in buckling connection with the torque connecting device 2;
step 5: the torque monitoring maximum value is preset to 10Nm through the torque value monitoring window 10,
step 6: twisting the torque wrench 5, screwing the other end of the stud 9 of the M6 into the part 4, and when the torque value reaches 10Nm, slipping the upper end connection part 18 of the square connector 11, so that the torque wrench 5 cannot be forced, and the assembly is completed;
step 7: reverse rotating the torque wrench 5 to remove the torque transmission mechanism 101;
in an embodiment of the present invention, the method may further include:
after the stud of M6 is assembled, when the stud of M16 is still assembled, only the two stoppers 8 are pulled out by the grippers holding the stoppers 8, the conversion head 7 matched with the stud 9 of M16 can be replaced quickly, then the maximum value of torque monitoring is preset to 30Nm through the torque value monitoring window 10, and then the steps 6-7 are repeated.
In an embodiment of the present invention, the method may further include:
when the stud bolt mounting tool is not used for a long time, the button 6 at the upper end of the square connector 11 of the torque wrench 5 is pressed, and the torque wrench 5 is taken down and stored in the tool box.
It should be noted that the device provided by the present invention includes a conversion head matching with all specifications of stud bolts on the market.
It is noted that, in embodiments 2 and 3 of the present invention are embodiments of the method of using the device provided in embodiment 1, the content set forth in the embodiment of the device (embodiment 1) is equally applicable to the embodiment of the method (embodiment 2 and embodiment 3), and meanwhile, the content set forth in the embodiment of the method (embodiment 2 and embodiment 3) is equally applicable to the embodiment of the device (embodiment 1) corresponding to the method, so that a repetition of a larger description is avoided.
It should be understood that the foregoing description is only exemplary of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover all equivalent structures or equivalent processes as modifications within the scope of the invention, as may be included in the following claims.
Claims (6)
1. The utility model provides a stud mounting tool, includes torque wrench, torque connection device, torque transmission device, torque wrench connection torque connection device, torque connection device and torque transmission device fixed connection constitute torque transmission mechanism, its characterized in that still includes two spacer pins, removable conversion head is inlayed to torque transmission device inside, the spacing internal thread hole with stud complex is seted up to conversion head central point put, torque transmission device lateral wall is equipped with first pinhole and third pinhole, conversion head lateral wall sets up second pinhole and fourth pinhole, and wherein, a spacer pin passes through first pinhole and second pinhole, pierces through torque transmission device and conversion head's lateral wall, but does not see through spacing internal thread hole, pinning torque transmission device and conversion head; meanwhile, the other limiting pin penetrates through the side walls of the torque transmission device and the converter head through the third pin hole and the fourth pin hole, but does not penetrate through the limiting internal threaded hole, and is connected with the torque transmission device and the converter head in a pin joint mode; the torque wrench is in buckle connection with the torque connecting device, a torque value monitoring window is arranged on the side face of the torque wrench, and the torque value monitoring window is connected with one end, provided with a square connector, of the torque wrench through the torque sensing device; the limiting pin is a cylindrical pin with a grip at one end.
2. The stud installation tool of claim 1, wherein a square hole is formed in the center of the top end of the torque connection device, at least one clamping groove is formed in each side of the inner side wall of the square hole, a square connector matched with the square hole is arranged at one end of the torque wrench, and a buckle matched with the clamping groove is arranged on the side wall of the square connector to realize the buckle connection of the torque wrench to the torque connection device.
3. The stud installation tool of claim 2, wherein the clasp is retractable.
4. A stud bolt installation tool according to claim 3 wherein the square connector has a button on the upper end thereof, the button being depressed to retract the catch and remove the torque wrench.
5. A method of using the stud bolt installation tool of any one of claims 1 to 4, comprising the steps of:
step 1: the torque transmission mechanism is formed by connecting a torque connecting device and a torque transmission device through bolts;
step 2: selecting a conversion head matched with the stud bolt, aligning a first pin hole with a second pin hole, aligning a third pin hole with a fourth pin hole, using one limiting pin to penetrate through the first pin hole and the second pin hole, using the other limiting pin to penetrate through the third pin hole and the fourth pin hole, and jointly pinning the limiting conversion head and the torque transmission device by the two limiting pins;
step 3: one end of the stud bolt is screwed into a limiting internal threaded hole of the conversion head, so that the top end of the stud bolt props against the bottom of the torque connecting device, and limiting is completed;
step 4: the torque wrench is buckled and connected with the torque connecting device,
step 5: twisting the torque wrench, screwing the other end of the stud into a part to complete assembly, and recording the numerical value of a torque value monitoring window to complete monitoring;
step 6: reversely rotating the torque wrench to take down the torque transmission mechanism;
step 7: pressing a button at the upper end of the torque wrench connector to take down the torque wrench;
step 8: when the stud bolts with other specifications are fixed, only the two limiting pins are pulled out by holding the limiting pin grippers, the conversion heads matched with the stud bolts are replaced, and then the steps 5-7 are repeated.
6. A method of using the stud bolt installation tool of claim 5, further comprising the steps of:
and according to the torsion values required by tightening the stud bolts with different specifications, presetting a torsion maximum value through a torsion value monitoring window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325904.0A CN110977873B (en) | 2019-12-20 | 2019-12-20 | Stud bolt mounting tool and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911325904.0A CN110977873B (en) | 2019-12-20 | 2019-12-20 | Stud bolt mounting tool and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110977873A CN110977873A (en) | 2020-04-10 |
| CN110977873B true CN110977873B (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911325904.0A Active CN110977873B (en) | 2019-12-20 | 2019-12-20 | Stud bolt mounting tool and use method thereof |
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| Country | Link |
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| CN (1) | CN110977873B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114248097B (en) * | 2020-09-21 | 2023-09-15 | 中国航发商用航空发动机有限责任公司 | Bolt assembly system and bolt assembly method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4977799A (en) * | 1988-09-28 | 1990-12-18 | Sueharu Yasutomi | Clamping tool for stud bolt |
| CN201471352U (en) * | 2009-07-20 | 2010-05-19 | 谢维宁 | Digital torque connecting rod |
| TWM392714U (en) * | 2009-06-29 | 2010-11-21 | Wei-Ning Xie | Digital torque extension bar |
| CN207509146U (en) * | 2017-11-03 | 2018-06-19 | 广州柴油机厂股份有限公司 | A kind of stud fastening tool |
| CN211639740U (en) * | 2019-12-20 | 2020-10-09 | 无锡蠡湖增压技术股份有限公司 | Stud mounting tool |
-
2019
- 2019-12-20 CN CN201911325904.0A patent/CN110977873B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4977799A (en) * | 1988-09-28 | 1990-12-18 | Sueharu Yasutomi | Clamping tool for stud bolt |
| TWM392714U (en) * | 2009-06-29 | 2010-11-21 | Wei-Ning Xie | Digital torque extension bar |
| CN201471352U (en) * | 2009-07-20 | 2010-05-19 | 谢维宁 | Digital torque connecting rod |
| CN207509146U (en) * | 2017-11-03 | 2018-06-19 | 广州柴油机厂股份有限公司 | A kind of stud fastening tool |
| CN211639740U (en) * | 2019-12-20 | 2020-10-09 | 无锡蠡湖增压技术股份有限公司 | Stud mounting tool |
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| CN110977873A (en) | 2020-04-10 |
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Effective date of registration: 20240401 Address after: 214000 2 Tianzhu Road, Hudai Town, Binhu District, Wuxi City, Jiangsu Province Applicant after: Wuxi Lihu New Quality Energy saving Technology Co.,Ltd. Country or region after: China Address before: 214161 No.2 Tianzhu Road, Hudai Town, Binhu District, Wuxi City, Jiangsu Province Applicant before: WUXI LIHU Corp.,Ltd. Country or region before: China |
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