GB2034439A - Fixing piston to piston rod - Google Patents

Fixing piston to piston rod Download PDF

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Publication number
GB2034439A
GB2034439A GB7936205A GB7936205A GB2034439A GB 2034439 A GB2034439 A GB 2034439A GB 7936205 A GB7936205 A GB 7936205A GB 7936205 A GB7936205 A GB 7936205A GB 2034439 A GB2034439 A GB 2034439A
Authority
GB
United Kingdom
Prior art keywords
piston
piston rod
working
fixing
working piston
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.)
Granted
Application number
GB7936205A
Other versions
GB2034439B (en
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB2034439A publication Critical patent/GB2034439A/en
Application granted granted Critical
Publication of GB2034439B publication Critical patent/GB2034439B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/182—Rolling annular grooves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/12—Connection to driving members with piston-rods, e.g. rigid connections

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The pressure-tight fixing of a piston (2) to a piston rod (1) takes place, without the removal of material, using rollers (3) which are caused to approach the piston rod radially to bring the working piston into position and are then forced against the piston rod to form ribs (5) all around the piston rod which fix the piston to the rod. <IMAGE>

Description

SPECIFICATION Fixing piston to piston rod The invention originates from a method for the pressure-tight fixing of a working piston to the piston rod of a working cylinder. With known working cylinders, the working piston is generally pushed over a neck on the piston rod where it lies against a shoulder and is retained by a screw, or the piston rod is made in two parts, wherein the piston is located between the two halves of the piston rod which are screwed together by a screwthread arranged in a central bore. Such methods for fixing the working piston to the piston rod are complicated and expensive. In all cases they involve an operation including the removal of material.
As opposed to this, the method in accordance with the invention comprising the characterising features of the main claim has the advantage that no operation involving removal of material is required for the fixing of the working piston to the piston rod and no additional sealing elements are required whereby the said method of fixing is extremely economical.
Advantageous further developments and improvements of the method set forth in the main claim are made possible by the measures set forth in
the sub-claims.
An embodiment of the invention is illustrated in the drawing and is described in detail in the following specification. The single figure shows a section through a piston rod with a working piston fixed thereto.
A piston rod is referenced 1 which, before the fixing of the working piston 2, has the same overall diameter. The working piston 2 provided with a central bore is pushed onto the piston rod 1 and is finally positioned by the radial application of pressure rollers 3 on both sides of the working piston. This positioning takes place initially due to the parallel spacing of the pressure rollers matched to the length of the piston on both sides of the working piston. By further radial advance ofthe pressure rollers, ribs 5 are then thrown up and are forced against the working piston which is then absolutely rigidly and tightly fixed to the piston rod. With this method, the piston rod is given a rotary motion.However, it would clearly also be possible to retain the piston rod in a fixed position and to allow the pressure rollers to revolve around the piston rod by means of an apparatus.
Obviously, it is also possible to generate bulges in another manner, by using additional fluid-tight ele ments, which fix the working piston in its position, that is to say bulges which do not pass completely around but are only provided at separate locations.
What is essential, is that the fixing takes place with out any operation removing material.
CLAIMS 1. A method of fixing a working piston to the pis ton rod of a working cylinder, characterised in that, the working piston is pushed overthe piston rod and is brought into its position, that bulges are then formed on the piston rod on both sides of the work ing piston by radial compression in such a manner that they fix the working piston in its position.
2. A method according to claim 1 characterised in that the bulges are annular ribs which are formed especially by pressure rollers and generate a pressure-tight fixing for the working piston.
3. A method according to claim 1 and/or2 characterised in that the pressure rollers bring the working piston into its final position and by further feeding ribs are generated on both sides.
4. A piston rod according to one of claims 1 to 3 characterised in that it has the same diameter over its entire length.
5. A method of fixing a working piston to the piston rod of a working cylinder, substantially as herein described.
6. A piston fixed to a piston rod of uniform diameter substantially as herein described with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Fixing piston to piston rod The invention originates from a method for the pressure-tight fixing of a working piston to the piston rod of a working cylinder. With known working cylinders, the working piston is generally pushed over a neck on the piston rod where it lies against a shoulder and is retained by a screw, or the piston rod is made in two parts, wherein the piston is located between the two halves of the piston rod which are screwed together by a screwthread arranged in a central bore. Such methods for fixing the working piston to the piston rod are complicated and expensive. In all cases they involve an operation including the removal of material. As opposed to this, the method in accordance with the invention comprising the characterising features of the main claim has the advantage that no operation involving removal of material is required for the fixing of the working piston to the piston rod and no additional sealing elements are required whereby the said method of fixing is extremely economical. Advantageous further developments and improvements of the method set forth in the main claim are made possible by the measures set forth in the sub-claims. An embodiment of the invention is illustrated in the drawing and is described in detail in the following specification. The single figure shows a section through a piston rod with a working piston fixed thereto. A piston rod is referenced 1 which, before the fixing of the working piston 2, has the same overall diameter. The working piston 2 provided with a central bore is pushed onto the piston rod 1 and is finally positioned by the radial application of pressure rollers 3 on both sides of the working piston. This positioning takes place initially due to the parallel spacing of the pressure rollers matched to the length of the piston on both sides of the working piston. By further radial advance ofthe pressure rollers, ribs 5 are then thrown up and are forced against the working piston which is then absolutely rigidly and tightly fixed to the piston rod. With this method, the piston rod is given a rotary motion.However, it would clearly also be possible to retain the piston rod in a fixed position and to allow the pressure rollers to revolve around the piston rod by means of an apparatus. Obviously, it is also possible to generate bulges in another manner, by using additional fluid-tight ele ments, which fix the working piston in its position, that is to say bulges which do not pass completely around but are only provided at separate locations. What is essential, is that the fixing takes place with out any operation removing material. CLAIMS
1. A method of fixing a working piston to the pis ton rod of a working cylinder, characterised in that, the working piston is pushed overthe piston rod and is brought into its position, that bulges are then formed on the piston rod on both sides of the work ing piston by radial compression in such a manner that they fix the working piston in its position.
2. A method according to claim 1 characterised in that the bulges are annular ribs which are formed especially by pressure rollers and generate a pressure-tight fixing for the working piston.
3. A method according to claim 1 and/or2 characterised in that the pressure rollers bring the working piston into its final position and by further feeding ribs are generated on both sides.
4. A piston rod according to one of claims 1 to 3 characterised in that it has the same diameter over its entire length.
5. A method of fixing a working piston to the piston rod of a working cylinder, substantially as herein described.
6. A piston fixed to a piston rod of uniform diameter substantially as herein described with reference to the accompanying drawing.
GB7936205A 1978-11-21 1979-10-18 Fixing piston to piston rod Expired GB2034439B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782850423 DE2850423A1 (en) 1978-11-21 1978-11-21 METHOD FOR ATTACHING A PISTON TO THE PISTON ROD OF A WORK CYLINDER

Publications (2)

Publication Number Publication Date
GB2034439A true GB2034439A (en) 1980-06-04
GB2034439B GB2034439B (en) 1982-08-04

Family

ID=6055226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7936205A Expired GB2034439B (en) 1978-11-21 1979-10-18 Fixing piston to piston rod

Country Status (5)

Country Link
CH (1) CH644038A5 (en)
DE (1) DE2850423A1 (en)
FR (1) FR2442090A1 (en)
GB (1) GB2034439B (en)
IT (1) IT1126333B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523490A1 (en) * 1982-03-18 1983-09-23 Dana Corp METHOD FOR AXIALLY FIXING A METAL WHEEL ON A METALLIC SHAFT AND ELEMENT THUS PRODUCED
GB2144664A (en) * 1983-07-22 1985-03-13 Skf Kugellagerfabriken Gmbh Method of and apparatus for securing one article against movement with respect to another article
EP0340128A1 (en) * 1988-04-28 1989-11-02 Valtubes Camshaft assembling method and camshaft obtained
GB2329351A (en) * 1997-09-23 1999-03-24 Rolls Royce Power Eng Joining by means of rolling elements
EP1000686A2 (en) * 1998-10-20 2000-05-17 Adcock Technology Limited Apparatus for and method of manufacturing spindle components
EP2490243A1 (en) * 2011-02-16 2012-08-22 Eaton Corporation Latch assembly and electrical switching apparatus including the same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2516424B1 (en) * 1981-11-13 1986-01-24 Rivapompe Sa METHOD FOR FIXING A SHAFT ON A METAL SUPPORT, TOOL FOR CARRYING OUT THIS FIXING AND ASSEMBLY THUS OBTAINED
IT1171912B (en) * 1983-05-18 1987-06-10 Dugomrulli Srl PROCEDURE FOR BLOCKING AN ANNULAR ELEMENT ON A TREE AND ANULAR ELEMENT-TREE GROUP MADE
US4680844A (en) * 1985-12-23 1987-07-21 Allied Corporation Method of manufacturing a rotor
DE3601489C1 (en) * 1986-01-20 1987-03-05 Boge Gmbh Method for securing components on a piston rod
DE4034766A1 (en) * 1990-11-02 1992-05-07 Mann Und Kortmann Gmbh Assembly of shoes onto pistons of axial piston pump - involves closing shoe cup onto ball end in one operation by pressure of orbital rollers
DE10144588C1 (en) * 2001-09-11 2003-01-02 Moeller Gmbh Switch lock lever shaft fixing method uses pressure tool for deforming edge of lever bore after insertion of stepped diameter shaft
JP5219246B2 (en) * 2007-12-28 2013-06-26 武蔵精密工業株式会社 Camshaft molding method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2607334A1 (en) * 1976-02-23 1977-08-25 Goetz Metallbau Gmbh Fixing of anchoring bolts to metal facade plates - has tapered head of anchoring bolt inserted in blind hole whose edge is then deformed

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523490A1 (en) * 1982-03-18 1983-09-23 Dana Corp METHOD FOR AXIALLY FIXING A METAL WHEEL ON A METALLIC SHAFT AND ELEMENT THUS PRODUCED
GB2144664A (en) * 1983-07-22 1985-03-13 Skf Kugellagerfabriken Gmbh Method of and apparatus for securing one article against movement with respect to another article
EP0340128A1 (en) * 1988-04-28 1989-11-02 Valtubes Camshaft assembling method and camshaft obtained
FR2630790A1 (en) * 1988-04-28 1989-11-03 Valtubes METHOD FOR ASSEMBLING A REPORTED CAM SHAFT AND CAM TREE SO OBTAINED
GB2329351A (en) * 1997-09-23 1999-03-24 Rolls Royce Power Eng Joining by means of rolling elements
EP1000686A2 (en) * 1998-10-20 2000-05-17 Adcock Technology Limited Apparatus for and method of manufacturing spindle components
EP1000686A3 (en) * 1998-10-20 2001-06-13 Adcock Technology Limited Apparatus for and method of manufacturing spindle components
US6427311B1 (en) 1998-10-20 2002-08-06 Adcock Technology Limited Method of manufacturing spindle components
US6571459B2 (en) 1998-10-20 2003-06-03 Adcock Technology Limited Apparatus for manufacturing spindle components
EP2490243A1 (en) * 2011-02-16 2012-08-22 Eaton Corporation Latch assembly and electrical switching apparatus including the same
CN102683126A (en) * 2011-02-16 2012-09-19 伊顿公司 Latch assembly and electrical switching apparatus including the same
US8507817B2 (en) 2011-02-16 2013-08-13 Eaton Corporation Latch assembly and electrical switching apparatus including the same
CN102683126B (en) * 2011-02-16 2015-10-21 伊顿公司 Lock assembly and comprise the electric switching system of this lock assembly

Also Published As

Publication number Publication date
IT7927415A0 (en) 1979-11-20
DE2850423C2 (en) 1989-06-15
DE2850423A1 (en) 1980-05-29
FR2442090A1 (en) 1980-06-20
GB2034439B (en) 1982-08-04
IT1126333B (en) 1986-05-21
CH644038A5 (en) 1984-07-13
FR2442090B1 (en) 1984-06-22

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19991017