US20010013243A1 - Pressing pincer - Google Patents

Pressing pincer Download PDF

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Publication number
US20010013243A1
US20010013243A1 US09/756,544 US75654401A US2001013243A1 US 20010013243 A1 US20010013243 A1 US 20010013243A1 US 75654401 A US75654401 A US 75654401A US 2001013243 A1 US2001013243 A1 US 2001013243A1
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United States
Prior art keywords
pressing
pivot arms
bearing
carrier plates
pincer
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Granted
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US09/756,544
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US6434998B2 (en
Inventor
Rene Amherd
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Von Arx AG
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Individual
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Assigned to VON ARX AG reassignment VON ARX AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMHERD, RENE
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • 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
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5367—Coupling to conduit

Definitions

  • This invention relates to a pressing pincer for a pressing apparatus for connecting a tube section to a press fitting, having two T-shaped carrier plates between two pivot arms.
  • a pressing apparatus which has a pressing pincer for connecting a tube to a press fitting.
  • the pressing pincer has two pivot arms and in each one bolt is pivotably linked between two equal T-shaped carrier plates.
  • the pivot arms at one end have a bearing surface for the bearing on a pressing cylinder of the pressing apparatus.
  • On the oppositely lying end the pivot arms are configured as pressing surfaces directed to one another.
  • the linkings for the bolts are located on the carrier plates, at a distance.
  • a receiver of a connection bolt for connection to the pressing apparatus. With this apparatus the pressing pincer is pulled to the rear to the pressing apparatus.
  • FIG. 1 is a perspective view of a pressing apparatus with a pressing pincer, according to this invention
  • FIG. 2 is a top view of a pressing pincer according to the prior art
  • FIG. 3 is an exploded perspective view of a pressing pincer, according to this invention.
  • FIG. 4 is a perspective view of a particular embodiment of a centering bolt.
  • FIG. 1 shows a presssing apparatus with the associated exchangeable pressing pincer, in a perspective top view.
  • the pressing apparatus 2 comprises a drive unit and a connection unit for connection to a pressing pincer 1 .
  • the connection unit comprises two holding plates 22 .
  • the pressing pincer 1 with two T-shaped carrier plates 11 , 11 ′ is inserted between the holding plates 22 .
  • a connection bolt 22 is pushed through the holding plates and a receiver opening 112 on the T-shaped carrier plates 11 , 11 ′ and is secured.
  • the pressing apparatus 2 is thus ready for use.
  • the pressing pincer 1 then on actuation, with the two pivot arms 12 bears on the bearing surfaces 23 on the pressing apparatus 2 . With a further retraction of the pressing pincer 1 the pivot arms 12 are pushed laterally outwards and thus the pressing is undergone.
  • the pressing pincer 1 has two T-shaped carrier plates 11 , 11 ′.
  • the carrier plates 11 , 11 ′ on the bar piece laterally comprise in each case a bolt mounting 113 , 113 ′.
  • the pivot arms 12 , 12 ′ between the two T-shaped carrier plates 11 , 11 ′ are pivotably mounted in each case with one bearing bolt 13 , 13 ′ which is held in one of the bolt mountings 113 , 113 ′.
  • the pivot arms 12 , 12 ′ in the front part form clamping jaws 14 , 14 ′ which comprise pressing surfaces 15 , 15 ′ directed towards each other.
  • the pressing surfaces 15 , 15 ′ in the closed condition of the pressing pincer 1 form an opening which approximately corresponds to the diameter of the tubes or connection muffs to be pressed. This opening is limited by front end-edges 16 and rear end-edges 17 . In the closed condition the end-edges of both clamping jaws 14 , 14 ′ lie on one another.
  • the bearing bolts 13 may be secured on the T-shaped carrier plates 11 , 11 ′ by way of securing rings 131 .
  • both pivot arms 12 , 12 ′ by way of an active connection are connected so that compellingly they are uniformly and mutually pivotable.
  • the active connection of the two pivot arms 12 , 12 ′ comprise dog elements which engage into one another with an approximately positive fit.
  • the pivot arms 12 , 12 ′ each have a bearing region 181 , 181 ′.
  • the bearing region 181 , 181 ′ is located roughly on an imagined connection line between the pivot bearings 132 through which the bearing bolts 13 are led.
  • Each bearing region 181 , 181 ′ comprises half of the mounting for a guide bolt 183 .
  • the mounting comprises a bearing shell 182 , 182 ′ which embraces the guide bolts 183 in each case by less than half. This is necessary because the pivot arms 12 , 12 ′ on actuation are pivoted about the pivot bearing 132 and thus rotate somewhat about the guide bolt 183 .
  • the guide bolt with respect to the T-shaped carrier plates 11 , 11 ′ is displaced in the longitudinal direction somewhat to the rear or to the front. Therefore it may not be rigidly connected to the carrier plates 11 , 11 ′. It thus has end-surfaces which are as smooth as possible so that it may slide along on the inner surfaces of the T-shaped carrier plates 11 , 11 ′ with minimal friction.
  • the bearing regions 181 , 181 ′ have bolt guiding surfaces 185 between the bearing shells 182 , 182 ′.
  • the guide bolt 183 has shoulders 1831 which form abutment surfaces 1832 .
  • the guide bolt 183 is rotatably held in the bearing shells 182 , 182 ′, wherein the guide bolt 183 with its abutments surfaces 1832 is guided by the bolt guiding surfaces 185 through abutments.
  • the guide bolts 183 each is designed so short that in a bearing region it is perfectly held and with its end-face sides may not contact the inner surfaces of the T-shaped carrier plates 11 , 11 ′.
  • a further improvement of the pressing pincer 1 is achieved by the application of a bracing spring 184 .
  • the bracing spring 184 is possible to configure the bracing spring 184 as a spriral spring which embraces the guide bolts 183 at least partly, preferably sereral times.
  • the bracing spring 184 as a spiral spring of spring steel wire endures many loading cycles and tends to not break. Furthermore the bracing spring 184 on the guide bolt 183 is perfectly mounted and guided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Manipulator (AREA)
  • Surgical Instruments (AREA)

Abstract

A pressing apparatus with an associated, exchangeable pressing tool. The pressing apparatus has a drive unit and a connection unit for connection to a pressing pincer. The connection unit has two holding plates. The pressing pincer with its two T-shaped carrier plates is inserted between the holding plates. A connection bolt is pushed through the holding plates and a receiving opening on the T-shaped carrier plates and is secured. The pressing apparatus is thus ready for use. The pressing pincer with an actuation bears with its two pivot arms on bearing surfaces on the apparatus. With a further retraction of the pressing pincer the pivot arms are pushed out laterally and thus the pressing is undergone.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0001]
  • This invention relates to a pressing pincer for a pressing apparatus for connecting a tube section to a press fitting, having two T-shaped carrier plates between two pivot arms. [0002]
  • 2. Description of Related Art [0003]
  • From German Patent Reference DE 196 31 019 there is known a pressing apparatus which has a pressing pincer for connecting a tube to a press fitting. The pressing pincer has two pivot arms and in each one bolt is pivotably linked between two equal T-shaped carrier plates. The pivot arms at one end have a bearing surface for the bearing on a pressing cylinder of the pressing apparatus. On the oppositely lying end the pivot arms are configured as pressing surfaces directed to one another. The linkings for the bolts are located on the carrier plates, at a distance. In the region of the free end of the T-shaped carrier plates there is located a receiver of a connection bolt, for connection to the pressing apparatus. With this apparatus the pressing pincer is pulled to the rear to the pressing apparatus. At the same time the pivot arms slide with their bearing surfaces to the rear along bearing surfaces on the pressing apparatus. The pulling force is transmitted to the T-shaped carrier plates via the connection bolts. Thus the pivot arms pivot about the bearing bolt and the pressing jaws are moved against one another and pressed together. One disadvantage of this pressing pincer is that the pivot jaws are freely pivotable about the bearing bolts with respect to the T-shaped carrier plates. Thus the pivot jaws may be displaced mutually longitudinally by a certain amount. This has the effect that at the beginning of a pressing the clamping jaws and thus the actual clamping surface may be mutually displaced somewhat in the longitudinal direction. This results in an inexact pressing of the fittings to the tube. Furthermore there is a danger that the fitting and/or the tube at the beginning of the pressing are so damaged that a sealing connection is not guaranteed. [0004]
    • SUMMARY OF THE INVENTION
  • It is one object of this invention to provide a pressing pincer of the mentioned type, which prevents an inaccurate beginning of the pressing and which overcomes the disadvantages thus arising. [0005]
  • This object is achieved by this invention as specified in the specification and in the claims. [0006]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • This invention is described in combination with the drawings, wherein: [0007]
  • FIG. 1 is a perspective view of a pressing apparatus with a pressing pincer, according to this invention; [0008]
  • FIG. 2 is a top view of a pressing pincer according to the prior art; [0009]
  • FIG. 3 is an exploded perspective view of a pressing pincer, according to this invention; and [0010]
  • FIG. 4 is a perspective view of a particular embodiment of a centering bolt. [0011]
    • DESCRIPTION OF PREFERRED EMBODIMENTS
  • FIG. 1 shows a presssing apparatus with the associated exchangeable pressing pincer, in a perspective top view. The [0012] pressing apparatus 2 comprises a drive unit and a connection unit for connection to a pressing pincer 1. The connection unit comprises two holding plates 22. The pressing pincer 1 with two T- shaped carrier plates 11, 11′ is inserted between the holding plates 22. A connection bolt 22 is pushed through the holding plates and a receiver opening 112 on the T- shaped carrier plates 11, 11′ and is secured. The pressing apparatus 2 is thus ready for use. The pressing pincer 1 then on actuation, with the two pivot arms 12 bears on the bearing surfaces 23 on the pressing apparatus 2. With a further retraction of the pressing pincer 1 the pivot arms 12 are pushed laterally outwards and thus the pressing is undergone.
  • In FIG. 2 the [0013] pressing pincer 1 is shown in more detail. The pressing pincer 1 has two T- shaped carrier plates 11, 11′. The carrier plates 11, 11′ on the bar piece laterally comprise in each case a bolt mounting 113, 113′. At the free end there is the receiver opening 112 for receiving the connection bolt 21. The pivot arms 12, 12′ between the two T- shaped carrier plates 11, 11′ are pivotably mounted in each case with one bearing bolt 13, 13′ which is held in one of the bolt mountings 113, 113′. The pivot arms 12, 12′ in the front part form clamping jaws 14, 14′ which comprise pressing surfaces 15, 15′ directed towards each other. The pressing surfaces 15, 15′ in the closed condition of the pressing pincer 1 form an opening which approximately corresponds to the diameter of the tubes or connection muffs to be pressed. This opening is limited by front end-edges 16 and rear end-edges 17. In the closed condition the end-edges of both clamping jaws 14,14′ lie on one another. The bearing bolts 13 may be secured on the T- shaped carrier plates 11, 11′ by way of securing rings 131.
  • According to this invention, both [0014] pivot arms 12, 12′ by way of an active connection are connected so that compellingly they are uniformly and mutually pivotable. The active connection of the two pivot arms 12, 12′ comprise dog elements which engage into one another with an approximately positive fit.
  • How the elements of the [0015] pressing pincer 1 are joined together is easily visible from the exploded drawing of FIG. 3. The pivot arms 12, 12′, according to this invention, each have a bearing region 181, 181′. The bearing region 181, 181′ is located roughly on an imagined connection line between the pivot bearings 132 through which the bearing bolts 13 are led. Each bearing region 181, 181′ comprises half of the mounting for a guide bolt 183. The mounting comprises a bearing shell 182, 182′ which embraces the guide bolts 183 in each case by less than half. This is necessary because the pivot arms 12, 12′ on actuation are pivoted about the pivot bearing 132 and thus rotate somewhat about the guide bolt 183. Since the guide bolt 183 connects the two bearing regions 181, 181′ and thus the pivot arms 12, 12′ in a mutually rotatable manner, then compellingly both pivot arms 12, 12′ are pivoted uniformly and in opposite directions. This means that the guide bolt 183 symmetrically guides the pivot movements of the pivot arms 12, 12′. Thus the clamping jaws 14, 14′ with the pressing surfaces 15, 15′ are likewise pivoted in an exactly symmetrical manner and each pressing is effected in an equally precise manner.
  • With the actuation of the [0016] pivot arms 12, 12′, for reasons of geometry the guide bolt with respect to the T- shaped carrier plates 11, 11′ is displaced in the longitudinal direction somewhat to the rear or to the front. Therefore it may not be rigidly connected to the carrier plates 11, 11′. It thus has end-surfaces which are as smooth as possible so that it may slide along on the inner surfaces of the T- shaped carrier plates 11, 11′ with minimal friction. In one embodiment, the bearing regions 181, 181′ have bolt guiding surfaces 185 between the bearing shells 182, 182′. The guide bolt 183 has shoulders 1831 which form abutment surfaces 1832. The guide bolt 183 is rotatably held in the bearing shells 182, 182′, wherein the guide bolt 183 with its abutments surfaces 1832 is guided by the bolt guiding surfaces 185 through abutments. The guide bolts 183 each is designed so short that in a bearing region it is perfectly held and with its end-face sides may not contact the inner surfaces of the T-shaped carrier plates 11, 11′.
  • A further improvement of the [0017] pressing pincer 1 is achieved by the application of a bracing spring 184. It is possible to configure the bracing spring 184 as a spriral spring which embraces the guide bolts 183 at least partly, preferably sereral times. The bracing spring 184 as a spiral spring of spring steel wire endures many loading cycles and tends to not break. Furthermore the bracing spring 184 on the guide bolt 183 is perfectly mounted and guided.

Claims (8)

1. In a pressing pincer for a pressing apparatus for connecting a tube section to a press fitting, comprising: two pivot arms (12, 12′) positioned between two T-shaped carrier plates (11), two bearing bolts (13, 13′) arranged at a distance (A) from one another and each passing through one of the pivot arms (12, 12′), the pivot arms (12, 12′) pivotably connected to the carrier plates (11), the pivot arms (12, 12′) formed with clamping jaws (14, 14′) having pressing surfaces (15, 15′), wherein the pivot arms (12, 12′) by way of an active connection are pivotable uniformly in opposite directions.
2. In the pressing pincer according to
claim 1
, wherein the active connection of the two pivot arms (12, 12′) comprises dog elements which engage into one another in an approximately positive-fitting manner.
3. In the pressing pincer according to
claim 2
, wherein the dog elements each comprise a bearing region (181, 181′) which on the pivot arms (12, 12′) between the bearing bolts (13, 13′) lying opposite one another are at least partly formed as bearing shells (182, 182′) and between the bearing regions (181, 181′) a parallel guide bolt (183) is mounted in the bearing shells (182, 182′) so that the guide bolt (183) with respect to the pivot arms (12, 12′) is rotatably movable and without connection is longidutinally displaceable with respect to the T-shaped carrier plates (11).
4. In the pressing pincer according to
claim 3
, wherein each of the bearing shells (182, 182′) embraces the parallel guide bolt (183) by less than one-half of its circumference.
5. In the pressing pincer according to
claim 3
, wherein the bearing region has bolt guide surfaces (185) and the parallel guide bolt (183) comprises bearing surfaces (1832) which bear on the bolt guide surfaces (185).
6. In the pressing pincer according to
claim 1
, further comprising a bracing spring (184) between the two pivot arms (12, 12′).
7. In the pressing pincer according to
claim 7
, wherein the bracing spring (184) is a spiral spring and at least partly embraces the parallel guide bolts (183).
8. In a pressing pincer for a pressing apparatus for connecting a tube section to a press fitting, comprising of two pivot arms (12, 12′) positioned between two T-shaped carrier plates (11), two bearing bolts (13, 13′) arranged at a distance (A) from one another and each passing through one of the pivot arms (12, 12′), the pivot arms (12, 12′) pivotably connected to the carrier plates (11), the pivot arms (12,12′) formed with clamping jaws (14,14′) having pressing surfaces (15,15′), wherein the pivot arms (12, 12′) at locations lying opposite one another between the bearing bolts (13, 13′) in each case comprise a bearing region (181, 181′) at least partly formed as bearing shells (182, 182′), and between the bearing regions (181, 181′) a parallel guide bolt (183) is mounted in the bearing shells (182, 182′) so that the guide bolt (183) with respect to the pivot arms (12, 12′) is rotatably movable and without connection is longitudinaly displaceable with respect to the T-shaped carrier plates (11).
US09/756,544 2000-01-07 2001-01-08 Pressing pincer Expired - Lifetime US6434998B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH272000 2000-01-07
CH27/00 2000-01-07
CH20000027/00 2000-01-07

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US20010013243A1 true US20010013243A1 (en) 2001-08-16
US6434998B2 US6434998B2 (en) 2002-08-20

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US (1) US6434998B2 (en)
EP (1) EP1114698B1 (en)
AT (1) ATE248045T1 (en)
DE (1) DE50003436D1 (en)
ES (1) ES2202030T3 (en)

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US20030046973A1 (en) * 2001-09-11 2003-03-13 Hamm James E. Crimping assembly
WO2006017452A1 (en) * 2004-08-02 2006-02-16 Emerson Electric Co. Jaw arm for compression tools
US20060179912A1 (en) * 2005-02-16 2006-08-17 Emerson Electric Co. Compression tool jawset
US20070251070A1 (en) * 2003-11-20 2007-11-01 Amherd Rene Roller Holder Unit
US20190224823A1 (en) * 2018-01-22 2019-07-25 Von Arx Ag Hand-held pressing device
CN110434798A (en) * 2018-05-03 2019-11-12 株式会社多星泰克 Connection device and the pipeline press-fit connection equipment for using the connection device
KR20220001587A (en) * 2020-06-30 2022-01-06 박진우 projection cutting device

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US7155955B2 (en) 2001-09-11 2007-01-02 Emerson Electric Co. Crimping assembly
US20030046973A1 (en) * 2001-09-11 2003-03-13 Hamm James E. Crimping assembly
US20070251070A1 (en) * 2003-11-20 2007-11-01 Amherd Rene Roller Holder Unit
WO2006017452A1 (en) * 2004-08-02 2006-02-16 Emerson Electric Co. Jaw arm for compression tools
WO2006089011A1 (en) * 2005-02-16 2006-08-24 Emerson Electric Co. Compression tool jaw set
US7260975B2 (en) 2005-02-16 2007-08-28 Emerson Electric Co. Compression tool jawset
US20060179912A1 (en) * 2005-02-16 2006-08-17 Emerson Electric Co. Compression tool jawset
JP2008529814A (en) * 2005-02-16 2008-08-07 エマーソン エレクトリック カンパニー Compression tool jaw set
US20190224823A1 (en) * 2018-01-22 2019-07-25 Von Arx Ag Hand-held pressing device
CN110434798A (en) * 2018-05-03 2019-11-12 株式会社多星泰克 Connection device and the pipeline press-fit connection equipment for using the connection device
US11473701B2 (en) 2018-05-03 2022-10-18 Dasung Tech Co., Ltd. Connecting device and pipe press-fit connecting apparatus using the same
KR20220001587A (en) * 2020-06-30 2022-01-06 박진우 projection cutting device
KR102461999B1 (en) 2020-06-30 2022-10-31 박진우 projection cutting device

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EP1114698A2 (en) 2001-07-11
DE50003436D1 (en) 2003-10-02
US6434998B2 (en) 2002-08-20
EP1114698A3 (en) 2002-01-16
EP1114698B1 (en) 2003-08-27
ATE248045T1 (en) 2003-09-15
ES2202030T3 (en) 2004-04-01

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