• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A device for tightening screw joints, comprising a pressure fluid motor, an overload friction type slip clutch, a pressure fluid shut off valve and a release mechanism for initiating closing of said shut off valve at slipping of said overload clutch. The release mechanism comprises a female member associated with one of the slip clutch halves and a male member associated with the other of the slip clutch halves, and when aligned with said female member receivable thereinto. The release mechanism also comprises a guide means for urging against a biasing means said male member into alignment with said female member upon relative rotation of the slip clutch halves.
    公开号:SU967265A3
    申请号:SU782596556
    申请日:1978-03-22
    公开日:1982-10-15
    发明作者:Кристиан Шопс Кнут
    申请人:Атлас Копко Актиеболаг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to devices for tightening threaded connections, namely, mechanisms for shutting off a pneumatic wrench, and can be used in any industry to carry and pull out during assembly and disassembly of the same threaded connections. A known mechanism for disconnecting a device for tightening threaded connections, comprising a torque limit clutch and a torque torque adjustment knot C}. The disadvantage of this mechanism is that the sensitive element of the torque limitation clutch is a helical spring. On the device, and with the other free end, it is wound on the shank of the working shoe: TRICKS in the direction of its twisting. Torque limiting torque is ensured by the spring slipping on the shank of the working head, which does not ensure reliable tightening of the threaded connections to the threeyeNBJM torque, which does not depend on the given spring stiffness, and the torque g transmitted by this clutch depends on the spring friction coefficient in conjunction with the shank of the working head. The adjustment of the torque of the device is made by changing the length or number of turns of the coil spring. Closest to the proposed technical essence and the achieved result is a mechanism for shutting down a pneumatic nut driver, which contains a system for supplying compressed air with a pressure reducing and shut-off valve, a torque limit clutch mounted on the shaft of the nut driver, and a control unit for the shut-off valve f 2. However, this mechanism is characterized by insufficient reliability and lack of automatic control, since this mechanism is made in the form of a hydraulic cylinder connected with one end of the limit torque coupling, the other through a rocker arm with a valve that regulates the flow of compressed air into the wrench, which affects the moment of compressed air coming into the wrench due to the inertia of the large kinematic chain and the large dimensions of the elements of the mechanism for turning off the wrench.
    The aim of the invention is to increase the reliability and provide automatic control of the mechanism for shutting down the pneumatic wrench.
    Delivered goal1 is achieved by,. what is the mechanism for shutting down
    pneumatic wrench containing a compressed air supply system 10 with pressure reducing and shut-off valves, a torque limit clutch mounted on the nut driver shaft, and a shut-off valve control unit,
    the limiting moment is made by fricci-15 one, the leading coupling half of which is made with a through hole, the end of the driven half coupling half facing the leading half coupling is made with a three-step blind hole, the middle 20 stage of which is eccentric to its axis, the control node of the lock valve & with the possibility of movement in the hole of the leading half-coupling of the glass j with a thrust and spring-loaded stepped finger, the large degree of which is fixed by means of a hinge inside the glass, a smaller one - with It acts when the coupling half is slipped with a three-step hole of the driven half coupling, and the shut-off valve is made with a through axial hole in which the traction is fixed, the middle step of the hole is made so that it has a common larger hole with one side and 35 smaller diameter.
    Fig. 1 schematically depicts a wrench with its shut-down mechanism, a longitudinal section; in Fig. 2-40, a wrench shut-off mechanism, longitudinal rarez; in FIG. 3, a cross section of L — A in FIG. 1, in FIG. 4 — Node I in FIG.
    The mechanism for shutting down the pneumatic wrench contains a system
    I compressed air supply with preload by means of springs 2 and 3 reduction: 4 and shut-off 5 valves, torque limiting clutch mounted on the shaft 6 of a wrench and made of friction in the form of a leading 7 and driven 8 half couplings, the leading 7 of which is placed in a rotating ring
    .9 and is made with an axial through-hole 5-hole 10 and with a screw thread
    IIna its outer surface, forming with the screw 12 rotating ring 9 a pair of worm. Driven coupling half 8 is placed in a rotary 60 sleeve 13 and is made in the form of a shaft 6.
    with a nut head at its free end, and inside a cylindrical coil spring 14 a flat coil spring 15 is mounted, secured to 65
    Lenna ends in the rotary ring 9 and the rotary sleeve 13, made with the possibility of rotation.
    The locking screws 16 and 17 are designed to limit the rotational movement of the rotary ring 9 relative to the leading coupling half 7. The cylindrical spiral spring 14 can function either in the direction of winding the friction flat spiral spring 15, thereby increasing the pretension and the frictional grip of the latter, or in the right direction, the opposite of winding the spring 15, thereby neutralizing the pretension of the friction grip of the latter. The direction of action as well as the magnitude of the preliminary tension tim spring 14 can be positioned by rotating the rotary ring
    9 with the help of a worm 12.
    Facing the leading half coupling 7, the end of the driven coupling half 8 is made with a three-stage blind hole 18, the middle stage 19 of which is eccentric to its axis and is made so that it has a common larger hole with one side 20 and a smaller diameter hole 21.
    The control unit of the shut-off valve 5 is designed as installed with the possibility of movement in the openings
    10 of the leading half of the coupling 7 of the cup 22 with the tension of 23 and the spring-loaded stepped finger 24, the greater degree 25 of which is fixed inside the cup 22 by means of the hinge 26, less than 27 -interacts when the coupling half of the coupling 7.8 has a three-step hole 18 of the driven half-coupling 8, and the shut-off valve 5 is with a through axial bore 28, in which is fixed a ha ha 23.
    Glass 2.2 is preloaded relative to the leading coupling half 7 by means of a spring 29 and is connected to the hinge by means of a punch 30.
    The mechanism for turning off the pneumatic nut wrench is carried out in the following way.
    While tightening the threaded joint with the nut wrench, 4 and the shut-off valve 5, the valves are open, and the force from the pressure of the incoming compressed air on the springs 3 acting on the rod 23 exceeds the force generated by the reaction of the spring 29, while using the spring 30, mounted on the hinge 26, the stepped pin 24 with its step 27 rests on the bottom of the hole 20 or the step of the driven half-coupling 8.
    When, at the achievement of the required torque, the clutch begins to slip at the limiting moment, the leading coupling half 7 rotates relative to the driven half coupling 8, and the step
    27 fingers 24 begin to follow the internal profile of the hole 20 k when touched by the end of the step 19 and the common forming hole 20, the step 27 of the finger 24 falls into the hole 21 of the driven coupling half 8, while the cup 22 with the thrust 23 goes down and the check valve 5 It closes and closes by closing the spring-loaded pressure reducing valve 4 to the flow of compressed air into the motor of the wrench.
    However, after closing the reduction valve 4, the shut-off valve 5 ceases to act the pressure of compressed air and through the spring 29 the cup 22 with the thrust 23 rises up, opening the shut-off valve 5.
    A relative feature of the pneumatic wrench shutdown mechanism is the operation of the safety clutch, which means that after the threaded connection is tightened, including its scoop, when the wrench reaches the required torque, the clutch stops in any position not specifically required position or angular location for re-engagement of the drive and driven coupling halves.
    /, .
    权利要求:
    Claims (2)
    [1]
    1. A pneumatic wrench shut-off mechanism containing a compressed air supply with a reduction gear and shut-off valves, a torque limit clutch mounted on the shaft of the wrench, and a control unit of the shut-off valve, which has in order to increase reliability and provide automatic control, the clutch of the limiting moment is made by a friction clutch, the leading coupling half of which is made with a through hole, the end of the driven clutch coupling is connected to the leading half coupling by a three-step blind A hole, the middle stage of which is eccentric to its axis, the control unit of the shut-off valve is designed as a leading and low-speed stepped finger mounted in the leading half coupling of the cup, which is fixed with a hinge fixed inside the cup, and interacts with the half coupling with a hinge. a three-stage bore in the driven half coupling, and a shut-off valve is made with a through axial bore in which the ha is fixed.
    [2]
    2. The mechanism according to claim 1, of which the middle hole is made so that it has a common forming with one side. holes of larger diameter and on the other side of the hole of a smaller diameter.
    Sources of information taken into account in the examination: 1. USSR Author's Certificate for application 2165657/25-g28, cl. B 25 B 21/00, 1975.
    2. USSR author's certificate 340527, cl. B 25 B 21/00, 1970 (prototype).
    类似技术:
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    SU974930A3|1982-11-15|Device for tightening threaded joints
    SU967265A3|1982-10-15|Device for shutting-off pneumatic wrench
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    US4078618A|1978-03-14|Torque controller shutoff mechanism
    NO903019L|1991-04-11|Torque Transmission Device.
    US4576270A|1986-03-18|Torque control and fluid shutoff mechanism for a fluid operated tool
    US4154308A|1979-05-15|Low torque automatic screwdriver
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    US2700443A|1955-01-25|Torque clutch
    US3276524A|1966-10-04|Drive adapter for torque responsive control
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    US4718522A|1988-01-12|Automatic adjustment apparatus for a vehicle brake lever of a brake
    US2491325A|1949-12-13|Releasable screw driver
    同族专利:
    公开号 | 公开日
    US4191282A|1980-03-04|
    ES467895A1|1978-11-01|
    FR2384592A1|1978-10-20|
    SE405562B|1978-12-18|
    JPS53144098A|1978-12-15|
    FR2384592B1|1985-02-08|
    IT7848526D0|1978-03-21|
    NL7803016A|1978-09-26|
    BR7801745A|1978-10-17|
    SE7703257L|1978-09-23|
    CA1086108A|1980-09-23|
    DE2812126A1|1978-09-28|
    GB1597767A|1981-09-09|
    IT1103559B|1985-10-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2964151A|1958-12-01|1960-12-13|Reed Roller Bit Co|Automatic supply and shut off of motive fluid for torque tool|
    US3195704A|1962-08-02|1965-07-20|Rockwell Mfg Co|Torque responsive control for motor driven tool|
    US3275116A|1964-10-12|1966-09-27|Airetool Mfg Company|Air powered tool with overload cutoff|
    GB1389395A|1972-05-11|1975-04-03|Rockwell International Corp|Fastener tool|
    US3955662A|1974-12-19|1976-05-11|Rockwell International Corporation|Torque limiting wrench|
    US3956905A|1974-12-19|1976-05-18|Rockwell International Corporation|Clutch|DE2828379C2|1978-06-28|1989-02-23|Deutsche Gardner-Denver Gmbh, 7084 Westhausen, De|
    US4488604A|1982-07-12|1984-12-18|The Stanley Works|Torque control clutch for a power tool|
    US4576270A|1983-02-28|1986-03-18|The Aro Corporation|Torque control and fluid shutoff mechanism for a fluid operated tool|
    GB2151964B|1983-12-23|1987-07-15|Brian Ronald Tompkins|Improved screw driving tool|
    US4546833A|1983-12-27|1985-10-15|Microdot Inc.|Adjustable torque responsive control|
    FR2584644B1|1985-07-11|1987-11-27|Facom|TORQUE SCREWDRIVER|
    SE8901072L|1989-03-28|1990-09-29|Atlas Copco Tools Ab|ENGINE DRIVER SCREW|
    DE10303235B4|2002-01-29|2011-03-31|Makita Corp., Anjo|Torque-transmitting mechanisms and power tools with such torque-transmitting mechanisms|
    JP4125052B2|2002-06-21|2008-07-23|株式会社マキタ|Electric screwdriver|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7703257A|SE405562B|1977-03-22|1977-03-22|OVERLOAD COUPLING WITH PRESSURE FLUID DRIVER SCREWDRIVER|
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