CN114131551A - Self-fixing torque multiplication sleeve - Google Patents
Self-fixing torque multiplication sleeve Download PDFInfo
- Publication number
- CN114131551A CN114131551A CN202111396174.0A CN202111396174A CN114131551A CN 114131551 A CN114131551 A CN 114131551A CN 202111396174 A CN202111396174 A CN 202111396174A CN 114131551 A CN114131551 A CN 114131551A
- Authority
- CN
- China
- Prior art keywords
- worm
- sleeve
- gear
- input shaft
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- B25B17/00—Hand-driven gear-operated wrenches or screwdrivers
- B25B17/02—Hand-driven gear-operated wrenches or screwdrivers providing for torque amplification
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
Abstract
The utility model provides a from fixed moment of torsion multiplication sleeve, includes worm input shaft, worm wheel and sleeve, and worm input shaft, worm wheel, sleeve rotate with the shell body and be connected, and worm input shaft and worm wheel meshing transmission, the worm wheel center are equipped with the worm-wheel axle, and worm-wheel axle lower extreme is equipped with the transmission gear, and transmission gear drive sleeve rotates on the shell body, and the shell body front end is equipped with prevents changeing the driving lever, prevents changeing the driving lever for the rectangular block along shell body front end transverse distribution. Prevent changeing the driving lever through setting up at the shells front end, when the input shaft drives the sleeve and rotates, prevent changeing driving lever preventing device itself because reaction force and the rotation of the device itself that rotation inertia leads to, can accomodate the pin through increasing in the bottom simultaneously for utilize the foundation pile border to carry on spacingly, this device can provide huge multiplication moment, and under the condition that does not additionally increase the support simultaneously, the preventing device body rotates.
Description
Technical Field
The invention relates to the field of disassembling tools, in particular to a self-fixing torque multiplication sleeve.
Background
In the building industry and the manufacturing industry, screw fastening is the most used fixed connection mode in fixed connection, and object parts are fastened step by utilizing the physics and the mathematical principle of the inclined circular rotation and the friction of an object, and the screw fastening is simple and practical in structure and convenient for mass production and is widely introduced.
In the installation of large steel components such as power transmission towers, signal towers, wind power piles and the like, because the large scale and the high precision of the installation are needed, embedded parts with threaded holes are poured in the foundation according to standards in advance in the fixation of the bottom foundation, and then are connected with the threads in the embedded parts through screws, the installation field of the large equipment is suitable for the installation field of the large equipment due to the precision and the quick installation performance of the threaded connection, but because the large equipment has high weight, the fastening screws of the base are usually large, the specification of the screws is usually more than M64, very large pre-tightening torque is needed, a compressor with a wind cannon and a sleeve are generally adopted to ensure the tightening in the installation, the large transportation is responsible for the equipment transportation, but after the installation, the cost of specially transporting the compressor and the wind cannon for the fastening screws is unacceptable in the subsequent overhaul and maintenance process, however, the manual tightening obviously cannot meet the requirement of the pre-tightening torque, and the structure is generally adopted to increase the torque, such as increasing the length of the wrench, but the pre-tightening torque of the screw of M64 is 19353N M, and if the length of the wrench is increased, the manual tightening is obviously insufficient.
The prior art also has a device for multiplying the moment, for example, australian patent document AU2018361223 adopts a planetary gear to multiply the moment, but the planetary gear around the input shaft in the planetary gear expands the size of the device greatly along the axial direction to the periphery, the space is not enough to place the multiplication device with enough moment when fastening, and the multiplication device designed by the current space can only provide about 25 times of moment multiplication, the manpower needs to provide 19353/25= 774.12N · m moment, and obviously the manpower cannot achieve the moment.
The planet moment multiplication mechanism has the defects of self when increasing the moment, is different from the spanner fastening, the planet gear moment is not synchronously rotated by the whole planet carrier and the screw, an extra bracket is needed to fix the planet carrier, and the rotation of the input shaft is prevented from driving the planet carrier to be synchronously selected so as not to achieve the effect of increasing the moment.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-fixing torque multiplication sleeve, which can realize the limiting and fixing of a device without additionally increasing a bracket while increasing enough torque multiplication for the sleeve, and prevent the device from spinning.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a from fixed moment of torsion multiplication sleeve, includes worm input shaft, worm wheel and sleeve, and worm input shaft, worm wheel, sleeve rotate with the shell body and be connected, and worm input shaft and worm wheel meshing transmission, the worm wheel center are equipped with the worm-wheel axle, and worm-wheel axle lower extreme is equipped with the transmission gear, and transmission gear drive sleeve rotates on the shell body, and the shell body front end is equipped with prevents changeing the driving lever, prevents changeing the driving lever for the rectangular block along shell body front end transverse distribution.
The rear end of the bottom of the outer shell is provided with a retractable stop lever.
The aforesaid can accomodate the pin includes the groove of accomodating of bottom of the outer casing rear end bilateral symmetry distribution, accomodates the inslot and is equipped with the pin, and pin one end is rotated with the pole and is connected, pole and accomodate groove lateral wall fixed connection.
The upper end of the worm wheel shaft extends out of the outer shell to form a worm wheel input shaft, one end or two ends of the worm input shaft penetrate out of the outer shell, grooves for accommodating a wrench head on a wrench are formed in the end parts of the worm input shaft and the worm wheel input shaft penetrating out of the shell, the worm input shaft and the worm wheel are not self-locked, namely the expansion spiral angle of the worm input shaft is larger than the contact friction angle of the worm wheel and the worm.
The sleeve comprises an external sleeve gear and an internal sleeve groove, an intermediate gear is arranged between the transmission gear and the external sleeve gear, the transmission gear is in meshing transmission with the intermediate gear, and the intermediate gear is in meshing transmission with the external sleeve gear.
The two intermediate gears are respectively arranged on two sides of the transmission gear and are rotationally connected with the outer shell.
The outer shell comprises a lower shell and an upper shell, the lower end of the sleeve is rotatably connected with the bottom surface of the lower shell, a retainer is arranged at the upper end of the sleeve and fixedly connected with the lower shell, the upper end of the intermediate gear is rotatably connected with the retainer, the lower end of the intermediate gear is rotatably connected with the lower shell, a through hole is formed in the front end of the retainer, the position of the through hole corresponds to that of the sleeve groove, the upper end of the worm wheel shaft is rotatably connected with the upper shell, and the lower end of the worm wheel shaft is rotatably connected with the lower shell.
The lower end of the worm wheel shaft penetrates out of the worm wheel, the transmission gear is positioned on a shaft body on the lower side of the worm wheel shaft, and the upper end and the lower end of the worm wheel shaft are respectively connected with the top end and the bottom end of the outer shell in a rotating mode.
The sleeve groove is a hexagonal groove and is used for placing an outer hexagonal nut or a screw.
According to the self-fixing torque multiplication sleeve, the anti-rotation deflector rod is arranged at the front end of the outer shell, when the input shaft drives the sleeve to rotate, the anti-rotation deflector rod prevents the rotation of the device caused by reaction force and rotation inertia, and meanwhile, the storable stop lever is additionally arranged at the bottom and used for limiting by utilizing the edge of a foundation pile.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of the apparatus of the present invention in use on a foundation pile;
FIG. 2 is a schematic structural diagram of the outer casing of the present invention;
FIG. 3 is a schematic diagram of the torque multiplier apparatus of the present invention;
FIG. 4 is a bottom view of the torque multiplier device of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
fig. 6 is a sectional view of B-B in fig. 5.
Wherein: the anti-rotation device comprises an outer shell 1, a lower shell 101, an upper shell 102, a worm input shaft 2, a sleeve 3, an external sleeve gear 31, a sleeve groove 32, a worm wheel 4, a worm wheel shaft 5, a transmission gear 6, an intermediate gear 7, a through hole 8, a retainer 9, a worm wheel input shaft 10, an anti-rotation deflector rod 11, a receivable stopper rod 12, a receiving groove 121, a rod 122, a stopper rod 123, a foundation pile 13 and a screw 14.
Detailed Description
The technical scheme of the invention is explained in detail in the following by combining the drawings and the embodiment.
As shown in fig. 1-6, a self-fixing torque multiplication sleeve comprises a worm input shaft 2, a worm wheel 4 and a sleeve 3, wherein the worm input shaft 2, the worm wheel 4 and the sleeve 3 are rotatably connected with an outer shell 1, the worm input shaft 2 and the worm wheel 4 are in meshed transmission, a worm wheel shaft 5 is arranged at the center of the worm wheel 4, a transmission gear 6 is arranged at the lower end of the worm wheel shaft 5, the transmission gear 6 drives the sleeve 3 to rotate on the outer shell 1, an anti-rotation deflector rod 11 is arranged at the front end of the outer shell 1, the anti-rotation deflector rod 11 is a rectangular block transversely distributed along the front end of the outer shell 1, through the rotation of the worm input shaft 2, the upper end of the worm wheel shaft 5 extends out of the outer shell 1 to form a worm wheel input shaft 10, one end or two ends of the worm input shaft 2 penetrate out of the outer shell 1, and grooves for accommodating wrenches on wrenches are arranged at the ends of the worm input shaft 2 and the worm wheel input shaft 10, which penetrate out of the shaft.
Through the limiting function of preventing changeing driving lever 11 and foundation pile 13 for the device is when fastening, and the device body is owing to receive the rotatory reaction force of sleeve 3 during, restricts the device body rotation through foundation pile 13, plays the fixed action.
As shown in fig. 4, the rear end of the bottom of the outer casing 1 is provided with a retractable stop lever 12.
As shown in fig. 1 and 4, the above-mentioned retractable blocking rod 12 includes a storage groove 121 symmetrically distributed on both sides of the bottom of the outer casing 1, a blocking rod 123 is disposed in the storage groove 121, one end of the blocking rod 123 is rotatably connected to the rod 122, the rod 122 is fixedly connected to the side wall of the storage groove 121, the blocking rod 123 is normally stored in the storage groove 121, and extends out when the device is used, and when the device body is rotated by a reaction force, the blocking rod 123 abuts against the edge of the foundation pile 13 to prevent the device from rotating.
As shown in fig. 3, the upper end of the worm wheel shaft 5 extends out of the outer shell 1 to form a worm wheel input shaft 10, one end or two ends of the worm input shaft 2 penetrate out of the outer shell 1, grooves for accommodating a wrench head on a wrench are formed in the end parts of the worm input shaft 2 and the worm wheel input shaft 10 penetrating out of the shell parts, and the worm input shaft 2 and the worm wheel 4 are not self-locked, namely the expansion helical angle of the worm input shaft 2 is larger than the contact friction angle of the worm wheel and the worm.
Through the non-self-locking transmission of the worm gear and the worm, when the worm gear input shaft 10 is used for torque input, the worm gear and the worm are not contained in the transmission ratio, the rotating operation with a high rotating speed can be carried out, when the worm gear input shaft 10 rotates to enable the nut or the screw to reach the maximum torque input at the worm gear, the torque input is carried out at the worm input shaft 2, the multiplication torque is increased, and the final tightening torque meets the requirement.
As shown in fig. 5 and 6, the sleeve 3 includes an external sleeve gear 31 and an internal sleeve groove 32, an intermediate gear 7 is arranged between the transmission gear 6 and the external sleeve gear 31, the transmission gear 6 is in meshing transmission with the intermediate gear 7, the intermediate gear 7 is in meshing transmission with the external sleeve gear 31, the external diameter of the intermediate gear 7 is larger than that of the transmission gear 6, and the external diameter of the external sleeve gear 31 is greatly larger than that of the intermediate gear 7, so that the multiplication effect is greatly increased after three stages of torque multiplication from the worm input shaft 2.
As shown in fig. 6, the two intermediate gears 7 are respectively arranged on two sides of the transmission gear 6 and are rotatably connected with the outer shell 1, the two intermediate gears 7 are meshed with the transmission gear 6 and the sleeve external gear 31, and the two intermediate gears 7 are meshed with the transmission gear 6 while the transmission ratio is increased at two poles, so that the backlash of gear transmission can be eliminated, and the transmission rigidity of the device can be increased.
As shown in fig. 1 and 2, the outer casing 1 includes a lower casing 101 and an upper casing 102, a lower end of the sleeve 3 is rotatably connected to a bottom surface of the lower casing 101, a retainer 9 is disposed at an upper end of the sleeve 3, the retainer 9 is fixedly connected to the lower casing 101, an upper end of the intermediate gear 7 is rotatably connected to the retainer 9, a lower end of the intermediate gear is rotatably connected to the lower casing 101, a through hole 8 is disposed at a front end of the retainer 9, a position of the through hole 8 corresponds to a position of the sleeve groove 32, an upper end of the worm wheel shaft 5 is rotatably connected to the upper casing 102, and a lower end of the worm wheel shaft is rotatably connected to the lower casing 101.
As shown in fig. 4, the lower end of the worm wheel shaft 5 penetrates through the worm wheel 4, the transmission gear 6 is located on a shaft body at the lower side of the worm wheel shaft 5, the upper end and the lower end of the worm wheel shaft 5 are respectively rotatably connected with the top end and the bottom end of the outer shell 1, and the lower end of the worm wheel shaft 5 extends out to enable the transmission part of the sleeve 3 and the worm wheel shaft 5 to be located below the worm wheel 4, so that the distance between the rotating shafts between the worm wheel shaft 5 and the sleeve 3 is reduced, and the device structure is more compact.
As shown in fig. 5, foretell sleeve groove 32 is the hexagon recess for place outer hexagonal nut or screw, through multistage transmission and upper and lower two-layer transmission design, make under the moment multiplication obtains greatly increased's the condition, the structure becomes compacter than the planet speed reduction, only increase in sleeve one side direction, be applicable to the condition that large-scale steel frame constructs the base and often only one side has open space, simultaneously, through setting up the input shaft in worm and worm wheel two places, make two punishments form fast shelves and moment shelves respectively, be fit for the in-service use condition.
Claims (9)
1. The utility model provides a from fixed moment of torsion multiplication sleeve, a serial communication port, including worm input shaft (2), worm wheel (4) and sleeve (3), worm input shaft (2), worm wheel (4), sleeve (3) are rotated with shell body (1) and are connected, worm input shaft (2) and worm wheel (4) meshing transmission, worm wheel (4) center is equipped with worm-gear axle (5), worm-gear axle (5) lower extreme is equipped with transmission gear (6), transmission gear (6) drive sleeve (3) rotate on shell body (1), shell body (1) front end is equipped with prevents changeing driving lever (11), prevent changeing driving lever (11) for the rectangular block along shell body (1) front end transverse distribution.
2. A self-fixating torque multiplication sleeve according to claim 1, wherein the outer housing (1) is provided with a receivable stop (12) at the bottom rear end.
3. The self-fixing torque multiplication sleeve according to claim 2, wherein the receivable retaining rod (12) comprises a receiving groove (121) symmetrically distributed on both sides of the rear end of the bottom of the outer housing (1), a retaining rod (123) is disposed in the receiving groove (121), one end of the retaining rod (123) is rotatably connected to the rod (122), and the rod (122) is fixedly connected to the side wall of the receiving groove (121).
4. The self-fixing torque multiplication sleeve according to claim 1, wherein the upper end of the worm gear shaft (5) extends out of the outer shell (1) to form a worm gear input shaft (10), one end or two ends of the worm input shaft (2) penetrate out of the outer shell (1), the end parts of the worm input shaft (2) and the worm gear input shaft (10) penetrating out of the shell part are provided with grooves for accommodating a wrench head on a wrench, the worm input shaft (2) and the worm gear (4) are not self-locked, namely the expansion helix angle of the worm input shaft (2) is larger than the contact friction angle of the worm gear and the worm.
5. A self-securing torque multiplication sleeve according to claim 4, wherein the sleeve (3) comprises an external sleeve gear (31) and an internal sleeve groove (32), an intermediate gear (7) is arranged between the transmission gear (6) and the external sleeve gear (31), the transmission gear (6) is in meshing transmission with the intermediate gear (7), and the intermediate gear (7) is in meshing transmission with the external sleeve gear (31).
6. A self-fixating torque multiplication sleeve according to claim 5, wherein there are two intermediate gears (7) arranged on either side of the transfer gear (6) and rotationally connected to the outer housing (1).
7. The self-fixing torque multiplication sleeve according to claim 5, wherein the outer shell (1) comprises a lower shell (101) and an upper shell (102), the lower end of the sleeve (3) is rotatably connected with the bottom surface of the lower shell (101), a retainer (9) is arranged at the upper end of the sleeve (3), the retainer (9) is fixedly connected with the lower shell (101), the upper end of the intermediate gear (7) is rotatably connected with the retainer (9), the lower end of the intermediate gear is rotatably connected with the lower shell (101), a through hole (8) is arranged at the front end of the retainer (9), the position of the through hole (8) corresponds to the position of the sleeve groove (32), the upper end of the worm wheel shaft (5) is rotatably connected with the upper shell (102), and the lower end of the worm wheel shaft is rotatably connected with the lower shell (101).
8. The self-fixing torque multiplication sleeve according to claim 4, wherein the lower end of the worm gear shaft (5) penetrates through the worm gear (4), the transmission gear (6) is located on a shaft body at the lower side of the worm gear shaft (5), and the upper end and the lower end of the worm gear shaft (5) are respectively rotatably connected with the top end and the bottom end of the outer shell (1).
9. A self-securing torque multiplication sleeve according to claim 4, wherein the sleeve slot (32) is a hexagonal recess for receiving an external hexagonal nut or screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111396174.0A CN114131551A (en) | 2021-11-23 | 2021-11-23 | Self-fixing torque multiplication sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111396174.0A CN114131551A (en) | 2021-11-23 | 2021-11-23 | Self-fixing torque multiplication sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114131551A true CN114131551A (en) | 2022-03-04 |
Family
ID=80390993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111396174.0A Pending CN114131551A (en) | 2021-11-23 | 2021-11-23 | Self-fixing torque multiplication sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114131551A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201720088U (en) * | 2010-05-31 | 2011-01-26 | 上海东泷重型机械有限公司 | Self-fixed crusher of external bearing |
| CN203146770U (en) * | 2013-03-11 | 2013-08-21 | 大连天工机械有限公司 | Anti-rotation device with radial moving rotating shaft bearing seat |
| CN205097106U (en) * | 2015-11-16 | 2016-03-23 | 沧州渤海防爆特种工具集团有限公司 | Arm -type quick nut dismouting machines |
| CN206233879U (en) * | 2016-11-25 | 2017-06-09 | 东营瑞奥工贸有限责任公司 | Oil drilling machine quadruple board platform pipe arranging robot tubing string pawl |
| CN206309873U (en) * | 2016-12-28 | 2017-07-07 | 东莞市赛仑特实业有限公司 | A kind of gear box structure of beauty treatment instrument |
| CN207309805U (en) * | 2017-09-08 | 2018-05-04 | 桂林电子科技大学 | A kind of saving hand spanner |
| CN209145404U (en) * | 2018-10-18 | 2019-07-23 | 王娟 | A kind of civil construction interim wall reinforcing staking out |
| CN210414333U (en) * | 2019-05-05 | 2020-04-28 | 济南巨源信息技术有限公司 | Electric tool for screwing outer polygonal part |
| CN211175235U (en) * | 2019-09-02 | 2020-08-04 | 深圳市力辉电机有限公司 | Parallel shaft gear transmission structure |
| DE202020103844U1 (en) * | 2019-07-04 | 2020-10-07 | VLAPOS s.r.o. | Side turning key |
| CN212149661U (en) * | 2020-05-12 | 2020-12-15 | 浙江商业职业技术学院(杭州商业技工学校) | A storage device for electronic commerce |
-
2021
- 2021-11-23 CN CN202111396174.0A patent/CN114131551A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201720088U (en) * | 2010-05-31 | 2011-01-26 | 上海东泷重型机械有限公司 | Self-fixed crusher of external bearing |
| CN203146770U (en) * | 2013-03-11 | 2013-08-21 | 大连天工机械有限公司 | Anti-rotation device with radial moving rotating shaft bearing seat |
| CN205097106U (en) * | 2015-11-16 | 2016-03-23 | 沧州渤海防爆特种工具集团有限公司 | Arm -type quick nut dismouting machines |
| CN206233879U (en) * | 2016-11-25 | 2017-06-09 | 东营瑞奥工贸有限责任公司 | Oil drilling machine quadruple board platform pipe arranging robot tubing string pawl |
| CN206309873U (en) * | 2016-12-28 | 2017-07-07 | 东莞市赛仑特实业有限公司 | A kind of gear box structure of beauty treatment instrument |
| CN207309805U (en) * | 2017-09-08 | 2018-05-04 | 桂林电子科技大学 | A kind of saving hand spanner |
| CN209145404U (en) * | 2018-10-18 | 2019-07-23 | 王娟 | A kind of civil construction interim wall reinforcing staking out |
| CN210414333U (en) * | 2019-05-05 | 2020-04-28 | 济南巨源信息技术有限公司 | Electric tool for screwing outer polygonal part |
| DE202020103844U1 (en) * | 2019-07-04 | 2020-10-07 | VLAPOS s.r.o. | Side turning key |
| CN211175235U (en) * | 2019-09-02 | 2020-08-04 | 深圳市力辉电机有限公司 | Parallel shaft gear transmission structure |
| CN212149661U (en) * | 2020-05-12 | 2020-12-15 | 浙江商业职业技术学院(杭州商业技工学校) | A storage device for electronic commerce |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209238724U (en) | A kind of material rolling device | |
| CN114131551A (en) | Self-fixing torque multiplication sleeve | |
| CN210920043U (en) | Large planet wheel casting convenient to install and adjust | |
| US4942794A (en) | Torque tool | |
| CN201211663Y (en) | Worm screw type pressure wrench | |
| CN212643488U (en) | Planetary gear device for speed reduction | |
| CN213711576U (en) | Anti-slip high-strength hexagon nut | |
| CN207070680U (en) | A kind of self-locking manual film-coiling device | |
| CN114131552A (en) | Double-input torque multiplication sleeve | |
| CN114131550A (en) | Torque multiplication sleeve | |
| CN101486176B (en) | Anti-torsion torque-increasing spanner for prestressed anchor rod | |
| CN111348571B (en) | Rescue capstan speed change gear | |
| CN114290288A (en) | Spacecraft final assembly fastener pre-tightening device based on torque reversing | |
| CN206281659U (en) | A kind of vehicle-mounted child constrained system test tool coiler | |
| CN202050194U (en) | Screw tightener | |
| CN220151704U (en) | Heavy nut with screw rod not easy to break | |
| CN2360227Y (en) | Boosting spanner | |
| CN101709770B (en) | Transmission mechanism | |
| CN219967778U (en) | Screw spanner at groove | |
| CN220015999U (en) | Speed reducer with locking driving mechanism | |
| CN215920298U (en) | Large-torque bolt assembling and disassembling wrench in narrow space | |
| CN214838223U (en) | Screw rod transmission device | |
| CN111113318B (en) | Preset electric torque wrench | |
| CN219413233U (en) | Axle center structure that bearing performance is strong | |
| CN202388481U (en) | Electric torque multiplier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |