EP0454375A2 - Dispositif de vissage - Google Patents

Dispositif de vissage Download PDF

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Publication number
EP0454375A2
EP0454375A2 EP91303523A EP91303523A EP0454375A2 EP 0454375 A2 EP0454375 A2 EP 0454375A2 EP 91303523 A EP91303523 A EP 91303523A EP 91303523 A EP91303523 A EP 91303523A EP 0454375 A2 EP0454375 A2 EP 0454375A2
Authority
EP
European Patent Office
Prior art keywords
screwing device
magazine
arms
screwing
mouth
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.)
Withdrawn
Application number
EP91303523A
Other languages
German (de)
English (en)
Other versions
EP0454375A3 (en
Inventor
Matthias Wetzel
Achim Honold
Christoph Wirth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Newfrey LLC
Original Assignee
Newfrey LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Newfrey LLC filed Critical Newfrey LLC
Publication of EP0454375A2 publication Critical patent/EP0454375A2/fr
Publication of EP0454375A3 publication Critical patent/EP0454375A3/en
Withdrawn legal-status Critical Current

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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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/04—Arrangements for handling screws or nuts for feeding screws or nuts
    • B25B23/06—Arrangements for handling screws or nuts for feeding screws or nuts using built-in magazine
    • B25B23/065—Arrangements for handling screws or nuts for feeding screws or nuts using built-in magazine the magazine being coaxial with the tool axis
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/04—Arrangements for handling screws or nuts for feeding screws or nuts

Definitions

  • the invention relates to a screwing device for screwing up fixing elements having a generated surface, in particular polygonal nuts on threaded components, having a housing for receiving a magazine, a drivring motor and a rotating tube which guides the fixing elements in the screw axis direction, wherein a mouth-piece of the housing has a claw arrangement for arresting the front fixing elements.
  • plastics fixing elements have become increasingly important in assembly operations, in particular in the car industry.
  • plastics fixing elements can be mounted simply and rapidly and serve, in particular, for the fixing of cables by means of clips or cable binders or for the fixing of panelling.
  • plastics nuts are screwed onto studs to form such a fixing, the stud being welded on the body by means of a stud welding device. The thread of the plastics nuts is then screwed onto the studs.
  • a portable device is known from US-PS 2 256 012, with which polygonal nuts stored in a magazine can be separated and screwed onto bolts.
  • This known arrangement comprises a two-part housing so that a drum magazine containing the polygonal nuts can be used. The nuts are pressed from a magazine tube by means of a spring arrangement and are screwed on; if this tube is empty, the drum magazine is rotated accordingly so that further nuts are available.
  • a device for the automatic rotation of a screw is known from DE-OS 25 43 900, in which the screws are supplied to the mouth-piece of the device via a flexible conduit.
  • a seeker which ensures that the screw blown through the pliable supply line is invariably held in the position required for screwing it.
  • a chuck for the clamping of cap screws during the screwing-in process is described in DE-PS 26 21 932 and is designed such that the device can be loaded from the front with a rotating drive and the depth of insertion can be limited. Consequently, this known arrangement is not suitable for screwing polygonal nuts onto headless set screws.
  • a device for screwing in cap screws is described in PCT application WO 7900685, in which claws are provided for separating and conveying the individual screws and for transmitting the rotational movement to these screws.
  • the claw is axially movable and also pivotal by contact with the stud.
  • the device is arranged such that the claw propels the stud and transmits the rotation to the stud by positive connection.
  • a screwing device of the type outlined above such that it can be equipped in the simplest manner with fixing elements which are stored in a magazine, can be removed individually from the magazine and can be brought forcibly into the correct screwing position without the need to use technically complicated mechanisms for this purpose.
  • this object is achieved in that the magazine containing the lined up fixing elements is removably arranged in the screw axis in the housing, in that the claw arrangement consists of at least one spring-loaded arm which has an inwardly directed claw at its free end and of which the other end is articulated to a lifting mechanism movably engaging with the rotating tube, and in that the arm is forcibly guided between its blocking position holding the fixing element in its screwing position and its position in which it engages with the following fixing element.
  • the present invention provides a screwing device with which, in particular, plastics nuts stored in a magazine can be screwed onto studs.
  • the nuts are used as fixing elements in the car industry.
  • a magazine with, for example, sufficient plastics nuts for a car is integrated in the screwing device according to the invention. Therefore, the worker does not have to insert each nut individually into the device and then screw it up, but merely has to position the screwing device and can screw immediately. Only one magazine per car has to be exchanged.
  • the magazine and the necessary locking device are produced most simply in one component as the locking device is integrated in the form of a bead into the split magazine.
  • the magazine also has a rapid-action closure so that it can be exchanged very easily and can be reliably arrested.
  • a separate component for supplying the nuts to the tool can be dispensed with.
  • the supply means is constructed such that the arms remove the nuts from the magazine rather than the nuts being brought into the tool in the form of arms. For this removal process, the arms are brought behind the flange of the nut by means of the lifting mechanism and the rotating tube.
  • the arms must be adapted to open and close for this purpose. This is permitted by the rotating tube of which the movement is linked to that of the lifting piston and by a torsion spring which returns the rotating tube into its starting position.
  • a second drive for separating the nuts can be dispensed with, further simplifying the control and handling of the device according to the invention.
  • a compressed air motor is provided for driving the screwing device according to the invention so two different types of energy and two supply conduits are not required.
  • a toothed belt drive which not only operates silently but also has only slight losses during the transmission of power is provided for torque conversion.
  • Torque adjustment is achieved by means of a sliding hub with a very compact construction as, with a sliding hub, the toothed disc slides through on the drive tube, rather than two separate and therefore separately mounted shafts having to be used as with a sliding clutch.
  • the torque is applied with the mouth-piece in which the arms are held positively. This gives rise to the substantral advantage that the torque does not have to be transmitted via the tool bearing.
  • the screwing device which is a manual screwing device or a mobile manual screwing device in the embodiment illustrated, comprises a housing 48 into which a central magazine 4 is inserted.
  • a compression spring 35 is inserted in the rear part of the magazine tube in order to propel the polygonal nuts, in the form of hexagonal nuts in the embodiment illustrated, lined up in the magazine.
  • the magazine consists of a steel tube of which the front portion consists of three resilient lips 4b. As with a crimped connection, one respective bead 4a is pressed into the ribs which lock the nuts 1 in the magazine.
  • the nuts are permanently pressed against the beads 4a by the magazine base by means of the compression spring 35. These lips can spring back for removal of the individual nuts from the magazine.
  • the rear part of the magazine 4 has a handle 40 into which a rapid-action closure is integrated.
  • This rapid-action closure contains two slots into which there is inserted a bent sring wire 37 which snaps into an annular groove of the rapid-action closure receiver when the magazine 4 is locked.
  • the handle 40 also contains a rotation preventing means which ensures that the magazine 4 can be arrested only in a certain rotational position in the housing. The magazine is guided over its entire length in the manual screwing device, with the exception of the resilient lips 4b.
  • the plastics hexagonal nuts located in the magazine 4 arranged in the screw axis initially have to be separated, i.e. removed from the magazine, and then have to be supplied to the handling element.
  • This element consists of three staggered arms 3 offset by 120°. This staggering is necessary to enable the arms to engage in the magazine without resting on the magazine wall.
  • the arms 3 are articulated to a lifting piston 12 by means of a pin.
  • the arms are constructed such that they can be hinged open and are axially movable so as to be able to grip behind the flange of each nut. The axial displacement is achieved by the lifting piston 12.
  • a rotating tube 5 of which the movement is linked to that of the lifting piston has an oblique face 5a which can be rotated and allows the arms to hinge open.
  • a plastics bushing 9 has been pressed into them as a sliding bearing.
  • each arm there is located a jaw in the form of a claw 3a with which the nuts can be grasped in the manner described below.
  • a lifting mechanism consisting of a lifting cylinder 14 and the lifting piston 12 on which the arms 3 are articulated is also provide in the housing.
  • the lifting piston 12 performs a stroke in order to separate the nuts and bring them into the screwing position.
  • the two piston parts are joined together by means of a locating member, which centres the two parts, and a thread.
  • the two piston parts are also sealed from one another by this locating member and the thread.
  • the seal between the piston 12 and the cylinder 14 is produced by means of O-rings 10, 17, the two O-rings being installed so as to float in the lifting piston.
  • the lifting piston has a transverse bore for receiving a steel ball which links the movement of lifting piston and rotating tube in the manner described above.
  • the steel ball is positioned radially, lies in a guide plane of the rotating tube and produces the rotation thereof.
  • the lifting cylinder 14 has two transverse bores through which compressed air passes into the cylinder and transmits the torque for screwing up the individual nuts.
  • a mouth-piece 2 (see also Figure 5) is fixed on the lifting cylinder by means of cylinder pins and is centred by a locating member.
  • the rotating tube 5 surrounded by the lifting piston 12 has the object of hinging open the arms 3 during the return travel of the lifting piston 12 and of allowing them to drop behind the flange of the first nut in the magazine 4 once they have reached their rear position. For this reason, the rotating tube 5 has, in the region of its front portion, an oblique face 5a, up which the arms 3 slide.
  • the rotating tube 5 is also provided with three slots at this point so that the arms 3 can grip the first nut 1 through these slots.
  • the rotating tube 5 has to be rotated.
  • the rotational movement of the rotating sleeve is linked to the movement of the lifting piston.
  • the rotating tube 5 is rotated until the arms 3 fall through the slots.
  • the rotating tube 5 remains in this position until the arms 3 are pushed from the rotating tube and the rotating tube is rotated back into its starting position owing to a torsion spring 19.
  • the rotating tube is rotatably mounted in a driving tube 20 and axially positioned by two cylindrical pins pressed into the rotating tube 5.
  • a driving tube 20 In the driving tube 20 there are two elongate slots into which cylindrical pins 21 extend and limit the rotational movement.
  • the torque is conveyed from a compressed air motor 49 via a toothed belt to a sliding hub.
  • the sliding hub transmits the torque to the driving tube 20 which transfers it to the cylinder 14.
  • the latter transmits the torque to the mouth-piece 2 which, in turn, positively holds the arms 3 and transfers the torque to the nut which is to be screwed up.
  • the sliding hub is arranged behind the lifting cylinder 14. As the direction of rotation is not reversed when using a toothed belt, the motor 49 has to rotate to the left so that the nuts 1 can be screwed onto a right-hand thread.
  • the sliding hub serves to adjust the torque in a given range because the same tightening moment is not requires in every application of the nut.
  • the driving tube 20 is integrated into the sliding hub so that the driving tube is simultaneously used as a hub.
  • the sliding hub has two run-on discs 27 of which one is fixed to the driving tube 20 by means of two clamping sleeves.
  • the second run-on disc is connected radially positively to the driving tube 20 and is axially positioned by three Belleville spring washers 33 and a nut with lateral notches 34 which is screwed onto the driving tube 20.
  • Two friction linings are screwed onto the belt pulley located between the two run-on discs 27,32.
  • a sliding bearing 31 by means of which it can slide without wear on the driving tube 20 after reaching the adjusted torque.
  • the torque to be transmitted is adjusted by the initial tension of the Belleville spring washers by means of the nut with lateral notches.
  • radial rotation preventing means constructed such that a respective plug of polyamide is pressed onto the thread of the driving tube 20 in two transverse bores in the notched nut 34 by means of a set screw.
  • the mouth-piece 2 has the object of positively holding the arms 3 so that the torque is transmitted, not via the arms and the hinge thereof but via the rigid mouth-piece 2, onto the nut which is to be screwed up.
  • the arms 3 are located positively in a groove N in a manner similar to a key.
  • the groove passes into a slot S so that the arms can hinge open during the return travel of the lifting piston.
  • the arms 3 continue to be guided in their slots or grooves (see Figure 5) throughout the entire loading process.
  • the entire driving unit including lifting cylinder and magazine also rotates during the screwing up process.
  • the compressed air supply of the lifting cylinder has to be sealed in a rotational fashion.
  • Two bores through which the two cylinder chambers are supplied with compressed air are located in the rotating cylinder wall.
  • two grooves into which the compressed air is conveyed when the valves are suitably adjusted are provided for this purpose at the level of the bores in the housing.
  • Figure 1 shows the outlet position at the beginning of the loading process.
  • the piston 12 is located in its foremost position there.
  • the lifting piston 12 on which the arms 3 are fixed by means of the cylindrical pins 8 can be moved backwards and forwards by actuation of the valve.
  • the compressed air flows from the valve into the respective annular groove of the housing 48 and passes through the associated bore in the cylinder wall 14 into the corresponding chamber of the cylinder.
  • the grooves are sealed from one another by sealing rings 13.
  • the cylinder chambers are sealed from one another and from the cylinder wall by means of the O-rings 10, 15 and 17.
  • the arms 3 strike the rotating tube 5.
  • the arms 3 are opened by the oblique face 5a of the rotating tube 5 and are moved backwards in this state.
  • the rotating tube 5 is rotated during the return travel by means of the ball which is located in the lifting piston 12 and runs in the guide track of the rotating tube 5. Owing to this rotation and the O-ring 7 which pulls the arms 3 together, the arms 3 pass through the slots of the rotating sleeve 5 behind the flange of the nut.
  • the lifting piston travels forwards owing to the changeover of the valve.
  • the arms 3 with the flange of the nut press the magazine lips 4b open, as shown in Figure 3.
  • the magazine lips 4b rebound immediately and therefore block the subsequent plastics nuts.
  • the lifting piston 12 continues advancing, the arms leave the slots of the rotating tube.
  • the rotating tube is therefore rotated back into its starting position by the prestressed springs 19.
  • valve (not shown) is actuated so that the torque of the compressed air motor 49 is transmitted by means of the two toothed discs 45 and 43 as well as the toothed belt 44 onto the sliding hub.
  • the two run-on discs 27 and 32 of the sliding hub transfer the torque by means of the two clamping sleeves 26 positively from the friction linings 28 on the toothed disc to the driving tube 20.
  • the torque is transmitted from there via the spacer ring 22 through the two clamping sleeves 21 to the cylinder wall 14.
  • the mouth-piece 2 is fixed on the cylinder wall by means of the three screws 6.
  • the mouth-piece is also connected to the cylinder wall 14 by means of which the torque is transmitted.
  • the nut is screwed onto a stud by the arms 3 held positively in the mouth-piece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Manipulator (AREA)
EP19910303523 1990-04-27 1991-04-19 Screwing device Withdrawn EP0454375A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904013638 DE4013638A1 (de) 1990-04-27 1990-04-27 Schraubgeraet
DE4013638 1990-04-27

Publications (2)

Publication Number Publication Date
EP0454375A2 true EP0454375A2 (fr) 1991-10-30
EP0454375A3 EP0454375A3 (en) 1992-06-03

Family

ID=6405309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910303523 Withdrawn EP0454375A3 (en) 1990-04-27 1991-04-19 Screwing device

Country Status (3)

Country Link
EP (1) EP0454375A3 (fr)
JP (1) JPH04226842A (fr)
DE (1) DE4013638A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694901A1 (fr) * 1992-08-24 1994-02-25 Aerospatiale Outillage pour le montage d'écrous sur des vis.
CN107598549A (zh) * 2017-10-23 2018-01-19 科快智能科技（上海）有限公司 一种螺母拧紧机构
CN108971956A (zh) * 2018-08-24 2018-12-11 齐齐哈尔建华机械有限公司 一种罐体拧紧机
CN113003504A (zh) * 2021-01-21 2021-06-22 南京工程学院 一种用于压力容器开罐的防护装置及其使用方法
CN113182830A (zh) * 2021-05-12 2021-07-30 格力电器（郑州）有限公司 出钉鸟嘴、自动锁螺钉装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10014754B4 (de) * 2000-03-24 2007-01-18 Christian Dr. Guist Magazin für Schraubenmuttern

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB621357A (en) * 1947-02-21 1949-04-07 Erik Elof Erikson Improvements in nut drivers
CH436161A (de) * 1964-12-23 1967-05-15 Feldpausch & Co Spindelwerkzeug, insbesondere Schrauber
DE2263648A1 (de) * 1972-12-27 1974-07-04 Feldpausch & Co Schraubkopf an einer schraubmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB621357A (en) * 1947-02-21 1949-04-07 Erik Elof Erikson Improvements in nut drivers
CH436161A (de) * 1964-12-23 1967-05-15 Feldpausch & Co Spindelwerkzeug, insbesondere Schrauber
DE2263648A1 (de) * 1972-12-27 1974-07-04 Feldpausch & Co Schraubkopf an einer schraubmaschine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694901A1 (fr) * 1992-08-24 1994-02-25 Aerospatiale Outillage pour le montage d'écrous sur des vis.
CN107598549A (zh) * 2017-10-23 2018-01-19 科快智能科技（上海）有限公司 一种螺母拧紧机构
CN108971956A (zh) * 2018-08-24 2018-12-11 齐齐哈尔建华机械有限公司 一种罐体拧紧机
CN108971956B (zh) * 2018-08-24 2024-03-15 齐齐哈尔建华机械有限公司 一种罐体拧紧机
CN113003504A (zh) * 2021-01-21 2021-06-22 南京工程学院 一种用于压力容器开罐的防护装置及其使用方法
CN113003504B (zh) * 2021-01-21 2022-07-12 南京工程学院 一种用于压力容器开罐的防护装置及其使用方法
CN113182830A (zh) * 2021-05-12 2021-07-30 格力电器（郑州）有限公司 出钉鸟嘴、自动锁螺钉装置
CN113182830B (zh) * 2021-05-12 2022-08-19 格力电器（郑州）有限公司 出钉鸟嘴、自动锁螺钉装置

Also Published As

Publication number Publication date
DE4013638A1 (de) 1991-10-31
EP0454375A3 (en) 1992-06-03
JPH04226842A (ja) 1992-08-17

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