• 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:
    The tightening device has a hydraulic arrangement consisting of cylinder (1) and piston (2) for producing a tensile force on the screw bolt and has a flexible spacer device (15), arranged between cylinder (1) and piston (2), and a restoring spring (18) exerting a restoring force on the piston (2). The spacer device (15) secures a minimum axial initial extent (H) of the pressure space (8) between cylinder (1) and piston (2). This initial extent (H) is necessary for releasing the nut (21) on the screw bolt without restraint. In its compressed state, the restoring spring (18) serves as a stop which prevents the piston (2) from moving out of the cylinder (1). The device is intended in particular for use in the case of tie rods of diesel engines. <IMAGE>
    公开号:SU969146A3
    申请号:SU772479506
    申请日:1977-05-12
    公开日:1982-10-23
    发明作者:Реш Пауль
    申请人:Гебрюдер Зульцер Аг (Инопредприятие)；
    IPC主号:
    专利说明:

    (54) DEVICE FOR TIGHTENING THREADED CONNECTIONS
    one ; ..
    The invention relates to a device for tightening threaded connections, mainly diesel engines, and can be used in mechanical engineering.
    A device for tightening threaded connections is known, which contains a hydraulic actuator in the form of a cylinder and a piston, made with an axial bore for the passage of a threaded connection element. The device is equipped with an auxiliary nut with a conical surface, at. This working surfaces of the piston and cylinder actuator are made conical and parallel to the conical surface of the auxiliary nut l.
    However, this device does not have sufficient reliability, since after the pressure in the actuator is relieved by squeezing the threaded joint, it is possible that the piston is wedged in the α cylinder of the actuator.
    The closest technical solution to the invention is a device for tightening threaded joints, which contains a hydraulic actuator in the form of stepped cylinders and a hollow powder, which form a working chamber with end faces of smaller stages, and returnable elements in the form of springs that interact with the outer end surface of a larger piston stage. t2j.
    A disadvantage of the known device lies in the complexity of manufacturing and the possibility of jamming the piston in the cylinder of the drive, after 10 pressure cells have been removed in the working chamber, since the working surfaces and the cylinder, forming the working chamber, mate with each other without a gap, and when compressing the threaded coupling 15, the drive may jam. .
    The purpose of the invention is to increase the reliability of the assembly and disassembly of threaded connections, mainly diesel engines.
    20
    This goal is ensured by the fact that the device for sharpening threaded connections, containing a hydraulic actuator in the form of stepped cylinders and a hollow piston, forming
    25 face surfaces of smaller steps working chamber, and return elements in the form of springs, interacting with the outer end surface of a larger piston stage j
    provided with spacer elements in the form of springs placed between the end surfaces of the large piston and cylinder stages, the piston is made with an internal thread designed to interact with the threaded connection element, and the large stages of the piston and cylinder are interconnected by screws with spacers and spacers . The drawing shows a longitudinal deviation of the device.
    The drawing shows a proposed device.
    Arrangements of hydraulic tools in the form of stepped cylinders 1 and hollow pistons 2, made with axial bores 3 and 4 for the passage of the element 5 of the threaded connection, tightened by means of a fastening nut 6, and the working chamber 7, formed by the end surfaces 8 and 9 of them, the lowest steps .10 and 11, return elements 12, interacting with the outer end surface 13 of the larger stage 14 of the piston 2. The device is equipped with spacer elements 15 in the form of springs placed between the end surfaces 16 and 17 of the large steps 14 and 18 piston 2 and cylinder 1. The device is provided with screws 19 V. The axial bore 4 of the piston 2 is threaded to cooperate with the element 5 of the threaded connection. The large stages 14, and 18 of the piston 2 and cylinder 1 are made with radial holes 20 and 21, while the holes 21 of cylinder 1 are threaded to interact with the thread of screws 19 passing through the radial holes 20 of piston 2. The return elements 12 are made in the form springs placed on the screws 19 and installed between their heads and the outer end surface 13 of the larger stage 14 of the piston 2. Returnable 12 and the spacer 15 elements are located opposite each other on opposite end surfaces 13 and 16 of the greater level 14 of the piston 2 installed in corresponding to the holes of the cylinder 1. with the possibility of axial movement and protected from leakage of working fluid seals 22 23
    The working chamber 7 is an annular pressure cavity, which through the inlet 24 is filled with working fluid and through the outlet of which 25 air is evacuated. The piston 2 has a central bore 26, in which a eyebolt (e is shown) can be screwed in to lift the tightening device. Between the end surfaces 16 and 17 of the piston 2 and the cylinder 1 there is a gap 27, in
    which have spacers 15 which can be preloaded and which are designed so that in the lower dead point of the piston 2, when the elements 15 are fully compressed, the working chamber 7 has at least the required initial volume H, which increases during the tightening process as the elements 15 are stretched and the threaded connection element 5 lengthens. When the return elements 12 are fully compressed, they serve as a stop that defines the top dead center of the piston 2 and prevents it from leaving
    5 of cylinder 1 while at the same time limiting the maximum tension of the threaded joint to the tightening device. In addition, the elements 12 return the piston 2 in
    Q is the initial position relative to cylinder 1, i.e. the specified position of junction 2 when unloading the working chamber 7 at the end of tightening the threaded joint. During the tightening of the threaded connection, the piston 2 and the nut 6 are screwed onto the element 5 of the threaded connection so that the end surfaces of the cylinder 1 and the nuts 6 abut against the diesel engine housing 28, and the nut 6 is placed inside the cylinder 1. The nut 6 has several radial blind the outer holes 29 available for inserting a knob in them (not shown; to rotate it through a 5.5 versts 30 cylinder 1.
    The device works as follows.,.
    To assemble the threaded joint into the working chamber 7, it is lagged through
    0 an inlet 24, a working fluid such as oil, a cylinder 1 abuts a diesel engine case 28 and, by means of a piston 2, causes a predetermined tensile stress in the element 5 of the threaded joint and the associated elongation. As the threaded connection element 5 lengthens, the volume H of the working chamber 7 increases, and the piston 2 is displaced in cylinder 1. When the threaded connection element 5 reaches a predetermined elongation, the nut b is screwed down to the body housing 28. The process fluid is then discharged.
    it from work chamber 7, than the latter is unloaded. Then the device is removed from the element 5 of the threaded joint and transferred to the next threaded connection, with the EO gate elements 12 returning the Shen 2 to the initial position relative to the cylinder 1.
    To disassemble a threaded joint, technological operations 65 are performed opposite to its assembly.
    For this, the device is screwed onto the element 5 of the threaded connection in the working chamber 7 and the pressure is moved to move the piston 2 upwards, which causes elongation of the element 5 of the threaded connection. After unscrewing the nut 6, the working chamber 7 is unloaded by discharging the working fluid and a tensile force is removed from the element 5 of the threaded joint, as a result of which it is instantly compressed by the amount of the initial elongation, resulting in a reduction in the volume of the working chamber 7 to the initial value.
    Consequently, if the initial volume of the working chamber 7 is less than the difference between the loading and unloading values of the elongation of the threaded element, the joint, there is a dragging of the entire threaded joint. This is prevented by the spacer element 15, since then the threaded joint element 5 is compressed by the initial amount of elongation and the piston 2 is moved by this amount, the spacer members 15 are compressed, ensuring a minimum working chamber 7 volume sufficient to prevent the threaded connection from overtightening.
    权利要求:
    Claims (2)
    [1]
    1. The patent of Germany No. 1299259, cl. B 25 B 29/02, 1969.
    [2]
    2. Acceptance of UK application No. 1321398, cl. B 25 B 29/02,
    (1973 (prototype).
    类似技术:
    公开号 | 公开日 | 专利标题
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    EP3118410A1|2017-01-18|Reciprocating piston engine
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    同族专利:
    公开号 | 公开日
    DE2625407C2|1978-06-29|
    DE2625407B1|1977-11-10|
    DK194677A|1977-11-14|
    AT357958B|1980-08-11|
    JPS52137556A|1977-11-17|
    ATA407676A|1979-12-15|
    GB1584158A|1981-02-04|
    JPS5527968B2|1980-07-24|
    IT1075339B|1985-04-22|
    CH610803A5|1979-05-15|
    DK146976C|1984-08-13|
    DK146976B|1984-03-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3047674C2|1980-12-18|1988-02-04|Hohmann, Hans, 5778 Meschede, De|
    EP0224622A3|1985-11-20|1987-11-11|Haskel, Inc.|Apparatus for tensioning a threaded stud or like member|
    WO1989002807A1|1987-09-29|1989-04-06|John Wentworth Bucknell|Force applicators|
    GB9325388D0|1993-12-11|1994-02-16|T M Kennedy & Co Ltd|Apparatus for reciprocating pumps|
    GB2291155B|1994-07-15|1998-04-08|Hydra Tight Ltd|Hydraulic bolt tensioning arrangement|
    GB9821018D0|1998-09-29|1998-11-18|Hydraulic Tensioning Technolog|hydraulic tensioning nut|
    GB2402188B|2003-05-28|2006-02-15|Team Innovation Ltd|Fastener assembly|
    DE10339201B4|2003-08-22|2005-07-21|Hohmann, Jörg|Double nut for controlled clamping of a component by means of a screw connection|
    DE102006033320B4|2006-07-17|2014-05-22|Astrium Gmbh|Screw biasing means|
    CN103032441B|2011-10-10|2015-11-25|北京金自天和缓冲技术有限公司|Locking device|
    GB201121976D0|2011-12-20|2012-02-01|Ceney David|Stud tensioning apparatus|
    DE102012109681A1|2012-10-11|2014-04-17|Jörg Hohmann|Clamping device for stretching a threaded bolt|
    CN106884843A|2017-04-17|2017-06-23|江苏智拓机械有限公司|A kind of assembling bolt|
    CN106917803A|2017-04-17|2017-07-04|江苏智拓机械有限公司|A kind of multiplex assembling bolt|
    CN106870541A|2017-04-17|2017-06-20|江苏智拓机械有限公司|A kind of combination nut|
    CN106931022A|2017-04-17|2017-07-07|江苏智拓机械有限公司|A kind of multiplex combination nut|
    GB2580113B|2018-12-21|2021-04-28|Caterpillar Energy Solutions Gmbh|Device for tensioning a connecting element|
    CN111331543B|2019-11-20|2022-02-01|中国航发沈阳黎明航空发动机有限责任公司|Narrow and small space nut installation device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH601876A|CH610803A5|1976-05-13|1976-05-13|Tightening device for tightening a screw bolt|
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