GB2163520A - Piston seal and gudgeon pin mounting - Google Patents

Piston seal and gudgeon pin mounting Download PDF

Info

Publication number
GB2163520A
GB2163520A GB08517274A GB8517274A GB2163520A GB 2163520 A GB2163520 A GB 2163520A GB 08517274 A GB08517274 A GB 08517274A GB 8517274 A GB8517274 A GB 8517274A GB 2163520 A GB2163520 A GB 2163520A
Authority
GB
United Kingdom
Prior art keywords
piston
gudgeon pin
cylinder
clamped
connecting rod
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
GB08517274A
Other versions
GB2163520B (en
GB8517274D0 (en
Inventor
Robert Douglas Jardine
Hugh K Davies
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.)
Honeywell UK Ltd
Original Assignee
Bendix Ltd
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
Priority claimed from GB848417392A external-priority patent/GB8417392D0/en
Application filed by Bendix Ltd filed Critical Bendix Ltd
Priority to GB08517274A priority Critical patent/GB2163520B/en
Publication of GB8517274D0 publication Critical patent/GB8517274D0/en
Publication of GB2163520A publication Critical patent/GB2163520A/en
Application granted granted Critical
Publication of GB2163520B publication Critical patent/GB2163520B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/0023—Multi-part pistons the parts being bolted or screwed together
    • 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
    • F16J1/02—Bearing surfaces
    • 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
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • 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
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • 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
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08—Thermoplastics

Abstract

An oil free piston and cylinder air-compressor has a reciprocating piston 4, in a cylinder 15, the piston being constructed with a head portion (6), a skirt portion (10) and a resiliently deformable plastics seal member 8, sealingly slideable in said cylinder said seal member being clamped between the head portion and the skirt portion by clamping screws (5, 12) which also serve to clamp a piston gudgeon pin 3, in position in the piston. <IMAGE>

Description

SPECIFICATION Piston and Cylinder Apparatus This invention relates to piston and cylinder apparatus and relates especially to the construction of pistons and the manner of connection thereof to connecting rods.
In a conventional piston and cylinder apparatus such as an internal combustion engine or a piston and cylinder compressor the or each piston is pivotally connected via a connecting rod to a crank pin the connecting rod being connected to the piston through the intermediate of a gudgeon pin. The smaller end of the connecting rod is usually moveable on the gudgeon pin which is located in the piston by circlips or other means.
According to the present invention there is provided piston and cylinder apparatus including a piston connected to a crankpin via gudgeon pin and a connecting rod this gudgeon pin being clamped to the piston.
The gudgeon pin may be clamped by being bolted to the piston or alternatively by being retained by one or more pinch bolts.
The invention further provides piston and cylinder oil free compressor apparatus including a piston constructed with a head portion and a skirt portion and a resiliently deformable plastics seal member sealingly slideable in the cylinder said seal member being clamped between the head portion and the skirt portion.
The seal member may be clamped between the head portion and the skirt portion by means of screw threaded members which press through said portions and into or through a gudgeon pin for pivotally linking a connecting rod to the piston.
In order that the invention may be more clearly understood and readily carried into effect the same will be further described by way of example with reference to Figs. 1, 2, 3 and 4 of the accompanying drawings.
Referring to Fig. 1, this shows a part-section through a piston and connecting rod designed for use in a piston and cylinder air compressor which operates with no external lubrication of the piston in the cylinder bore 15. The cylinder bore is preferably cast aluminium but other materials such as steel or cast iron may also be employed.
The connecting rod 1 is provided with a sealed needle roller bearing 2 rotatable on a solid gudgeon pin 3 retained in a generally cylindrical piston assembled of several components. The main body of the piston comprises an upper cast aluminium head portion 4 drilled axially on a diameter to receive two clamping screws 5 having countersunk heads. Adjacent the underside of the part 5 is an inner matching annular portion 6 for receiving respective flat-ground ends of the gudgeon pin 3. These ends of the gudgeon pin are transversely drilled and tapped to receive the screws 5 which thereby serve to clamp the gudgeon pin into position in relation to the portion 6.
In its turn inner portion 6 serves to clamp in position a bead 7 of an upwardly extending carbon-filled polytetrafluorethelene deformable piston seal 8 and a bead 9 of a downwardly extending skirt portion 10. This portion is a good wearing compatible plastic material such as "NYLATRON". Before insertion into the cylinder bore 15 the seal 8 is initially as a flat-washer as indicated at 16.
In the alternative embodiment of Fig. 2, the corresponding parts are given the same references as those used in Fig. 1. It will be seen that in preference to grinding flats on the gudgeon pin to engage the lower annular part 6 the head portion 6 is now provided with downwardly projecting lugs shown dotted having coaxial semi-cylindrical recesses for matching and locating the ends of the gudgeon pin. These ends are clamped in position as before by means of the screws 5.
In an alternative to the arrangement of Fig.
2, as shown in Fig. 3 wherein orthogonal sections are shown superimposed more positive clamping and positioning of the beads of the seal portion 8 and the skirt portion 10 is achieved by arranging for these to extend further radially inwards of the piston and for the clamping bolts 5 to pass through them as shown. More positive location the ends of the gudgeon pin are now also provided by transverse flats 13.
In yet another alternative as shown in Fig.
4, wherein orthogonal sections are again shown superimposed, corresponding reference numerals are again employed and it will be seen that downwardly projecting lugs 11 are again provided for receiving the respective ends of the gudgeon pin 3. In this instance, the lugs are line bored to receive the gudgeon pin and one side of each such lug is sawn with one slot as seen as 12 for each said side and drilled and tapped with a screw thread to receive a pinch-bolt. In the completed assembly these bolts as shown dotted at 13 clamp the gudgeon pin and the respective beads of the seal portion 8 and the skirt portion 10 as previously described in relation to Fig. 1 or Fig. 2. This arrangement may also be modified to allow the pinch-bolts to also pass through the beads of the seal part and skirt portion 10 if required as shown in Fig. 3.
1. Piston and cylinder apparatus including a cylinder and a piston reciprocable therein the piston being connected to a crankpin via a gudgeon pin and a connecting rod said gudgeon pin being clamped to the piston.
2. Piston and cylinder apparatus as claimed in claim 1 said gudgeon pin being drilled to receive clamping bolts passing through the head of the piston.
3. Piston and cylinder apparatus as claimed
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Piston and Cylinder Apparatus This invention relates to piston and cylinder apparatus and relates especially to the construction of pistons and the manner of connection thereof to connecting rods. In a conventional piston and cylinder apparatus such as an internal combustion engine or a piston and cylinder compressor the or each piston is pivotally connected via a connecting rod to a crank pin the connecting rod being connected to the piston through the intermediate of a gudgeon pin. The smaller end of the connecting rod is usually moveable on the gudgeon pin which is located in the piston by circlips or other means. According to the present invention there is provided piston and cylinder apparatus including a piston connected to a crankpin via gudgeon pin and a connecting rod this gudgeon pin being clamped to the piston. The gudgeon pin may be clamped by being bolted to the piston or alternatively by being retained by one or more pinch bolts. The invention further provides piston and cylinder oil free compressor apparatus including a piston constructed with a head portion and a skirt portion and a resiliently deformable plastics seal member sealingly slideable in the cylinder said seal member being clamped between the head portion and the skirt portion. The seal member may be clamped between the head portion and the skirt portion by means of screw threaded members which press through said portions and into or through a gudgeon pin for pivotally linking a connecting rod to the piston. In order that the invention may be more clearly understood and readily carried into effect the same will be further described by way of example with reference to Figs. 1, 2, 3 and 4 of the accompanying drawings. Referring to Fig. 1, this shows a part-section through a piston and connecting rod designed for use in a piston and cylinder air compressor which operates with no external lubrication of the piston in the cylinder bore 15. The cylinder bore is preferably cast aluminium but other materials such as steel or cast iron may also be employed. The connecting rod 1 is provided with a sealed needle roller bearing 2 rotatable on a solid gudgeon pin 3 retained in a generally cylindrical piston assembled of several components. The main body of the piston comprises an upper cast aluminium head portion 4 drilled axially on a diameter to receive two clamping screws 5 having countersunk heads. Adjacent the underside of the part 5 is an inner matching annular portion 6 for receiving respective flat-ground ends of the gudgeon pin 3. These ends of the gudgeon pin are transversely drilled and tapped to receive the screws 5 which thereby serve to clamp the gudgeon pin into position in relation to the portion 6. In its turn inner portion 6 serves to clamp in position a bead 7 of an upwardly extending carbon-filled polytetrafluorethelene deformable piston seal 8 and a bead 9 of a downwardly extending skirt portion 10. This portion is a good wearing compatible plastic material such as "NYLATRON". Before insertion into the cylinder bore 15 the seal 8 is initially as a flat-washer as indicated at 16. In the alternative embodiment of Fig. 2, the corresponding parts are given the same references as those used in Fig. 1. It will be seen that in preference to grinding flats on the gudgeon pin to engage the lower annular part 6 the head portion 6 is now provided with downwardly projecting lugs shown dotted having coaxial semi-cylindrical recesses for matching and locating the ends of the gudgeon pin. These ends are clamped in position as before by means of the screws 5. In an alternative to the arrangement of Fig. 2, as shown in Fig. 3 wherein orthogonal sections are shown superimposed more positive clamping and positioning of the beads of the seal portion 8 and the skirt portion 10 is achieved by arranging for these to extend further radially inwards of the piston and for the clamping bolts 5 to pass through them as shown. More positive location the ends of the gudgeon pin are now also provided by transverse flats 13. In yet another alternative as shown in Fig. 4, wherein orthogonal sections are again shown superimposed, corresponding reference numerals are again employed and it will be seen that downwardly projecting lugs 11 are again provided for receiving the respective ends of the gudgeon pin 3. In this instance, the lugs are line bored to receive the gudgeon pin and one side of each such lug is sawn with one slot as seen as 12 for each said side and drilled and tapped with a screw thread to receive a pinch-bolt. In the completed assembly these bolts as shown dotted at 13 clamp the gudgeon pin and the respective beads of the seal portion 8 and the skirt portion 10 as previously described in relation to Fig. 1 or Fig. 2. This arrangement may also be modified to allow the pinch-bolts to also pass through the beads of the seal part and skirt portion 10 if required as shown in Fig. 3. CLAIMS
1. Piston and cylinder apparatus including a cylinder and a piston reciprocable therein the piston being connected to a crankpin via a gudgeon pin and a connecting rod said gudgeon pin being clamped to the piston.
2. Piston and cylinder apparatus as claimed in claim 1 said gudgeon pin being drilled to receive clamping bolts passing through the head of the piston.
3. Piston and cylinder apparatus as claimed in claim 1 said gudgeon pin being drilled and tapped to receive clamping bolts passing through the head of the piston.
4. Piston and cylinder apparatus as claimed in claim 1 said gudgeon pin being clamped to the piston by means of pin-bolts.
5. Piston and cylinder apparatus including a cylinder and a piston reciprocable therein said piston being constructed with a head portion and skirt portion and a resioiently deformable plastic seal member sealingly slideable in said cylinder said seal member being clamped between the head portion and the skirt portion.
6. Piston and cylinder apparatus as claimed in claim 5 wherein the seal member is clamped between the head portion and the skirt portion by means of one or more screw threaded memgers passing through said portions and into or through a gudgeon pin for pivotally linking a connecting rod to the piston.
7. Piston and cylinder apparatus substantially as described herein with reference to Fig.
1, Fig. 2, Fig. 3 or Fig. 4 of the accompanying drawings.
GB08517274A 1984-07-07 1985-07-08 Piston and cylinder apparatus Expired GB2163520B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08517274A GB2163520B (en) 1984-07-07 1985-07-08 Piston and cylinder apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848417392A GB8417392D0 (en) 1984-07-07 1984-07-07 Piston and cylinder apparatus
GB08517274A GB2163520B (en) 1984-07-07 1985-07-08 Piston and cylinder apparatus

Publications (3)

Publication Number Publication Date
GB8517274D0 GB8517274D0 (en) 1985-08-14
GB2163520A true GB2163520A (en) 1986-02-26
GB2163520B GB2163520B (en) 1988-12-07

Family

ID=26287960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08517274A Expired GB2163520B (en) 1984-07-07 1985-07-08 Piston and cylinder apparatus

Country Status (1)

Country Link
GB (1) GB2163520B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997047871A1 (en) * 1996-06-11 1997-12-18 Evgeny Nikolaevich Zakharov Connecting-rod and piston assembly
WO1999028660A1 (en) * 1997-11-28 1999-06-10 Motorenfabrik Hatz Gmbh & Co. Kg Piston unit
US6131544A (en) * 1997-06-11 2000-10-17 Zakharov; Evgeny Nikolaevich Connecting-rod and piston assembly

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB258696A (en) * 1925-07-08 1926-09-30 Alfred John Riley Improvements relating to retaining and releasing devices for gudgeon pins in internal combustion engines, and for other purposes
GB315618A (en) * 1928-09-07 1929-07-18 Simplex Piston Ring Company Of Improvements relating to the production of piston slap in internal combustion engines
GB333753A (en) * 1929-08-26 1930-08-21 Charles John Mcnaught Improvements in or relating to piston mechanism
GB547258A (en) * 1941-02-28 1942-08-20 Henry James Pratt Improvements in sealing means for pistons for use in hydraulic mechanisms
GB549694A (en) * 1941-05-30 1942-12-02 Dewandre Co Ltd C Improvements in pistons for vacuum or pressure operated servo devices
GB608380A (en) * 1946-02-21 1948-09-14 Goetaverken Ab Improvements in pistons
GB613250A (en) * 1946-06-13 1948-11-24 Cyril Alphonso Pugh Improvements in or relating to pistons for fluid compressors
GB614146A (en) * 1945-08-27 1948-12-09 Hydraulic Brake Co Cup washers
GB646249A (en) * 1948-07-06 1950-11-15 Westinghouse Brake & Signal Improvements relating to piston packings
GB684298A (en) * 1950-04-27 1952-12-17 Bendix Westinghouse Automotive Improvements in or relating to pistons
GB731327A (en) * 1952-06-07 1955-06-08 Pitner Alfred Improvements in or relating to piston and connecting rod assemblies
GB867500A (en) * 1956-10-24 1961-05-10 Armstrong Patents Co Ltd Improvements in or relating to road vehicle suspension systems
GB2039665A (en) * 1978-12-11 1980-08-13 Helix Tech Corp Pressure stabilizing seal for stirling refrigeration system compressor piston

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB258696A (en) * 1925-07-08 1926-09-30 Alfred John Riley Improvements relating to retaining and releasing devices for gudgeon pins in internal combustion engines, and for other purposes
GB315618A (en) * 1928-09-07 1929-07-18 Simplex Piston Ring Company Of Improvements relating to the production of piston slap in internal combustion engines
GB333753A (en) * 1929-08-26 1930-08-21 Charles John Mcnaught Improvements in or relating to piston mechanism
GB547258A (en) * 1941-02-28 1942-08-20 Henry James Pratt Improvements in sealing means for pistons for use in hydraulic mechanisms
GB549694A (en) * 1941-05-30 1942-12-02 Dewandre Co Ltd C Improvements in pistons for vacuum or pressure operated servo devices
GB614146A (en) * 1945-08-27 1948-12-09 Hydraulic Brake Co Cup washers
GB608380A (en) * 1946-02-21 1948-09-14 Goetaverken Ab Improvements in pistons
GB613250A (en) * 1946-06-13 1948-11-24 Cyril Alphonso Pugh Improvements in or relating to pistons for fluid compressors
GB646249A (en) * 1948-07-06 1950-11-15 Westinghouse Brake & Signal Improvements relating to piston packings
GB684298A (en) * 1950-04-27 1952-12-17 Bendix Westinghouse Automotive Improvements in or relating to pistons
GB731327A (en) * 1952-06-07 1955-06-08 Pitner Alfred Improvements in or relating to piston and connecting rod assemblies
GB867500A (en) * 1956-10-24 1961-05-10 Armstrong Patents Co Ltd Improvements in or relating to road vehicle suspension systems
GB2039665A (en) * 1978-12-11 1980-08-13 Helix Tech Corp Pressure stabilizing seal for stirling refrigeration system compressor piston

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997047871A1 (en) * 1996-06-11 1997-12-18 Evgeny Nikolaevich Zakharov Connecting-rod and piston assembly
US6131544A (en) * 1997-06-11 2000-10-17 Zakharov; Evgeny Nikolaevich Connecting-rod and piston assembly
WO1999028660A1 (en) * 1997-11-28 1999-06-10 Motorenfabrik Hatz Gmbh & Co. Kg Piston unit
US6446542B1 (en) 1997-11-28 2002-09-10 Motorenfabrik Hatz Gmbh & Co. Kg Piston unit

Also Published As

Publication number Publication date
GB2163520B (en) 1988-12-07
GB8517274D0 (en) 1985-08-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960708