EP4649242A1 - An inseparable connection of two polymeric elements which is capable of rotating with limited torque - Google Patents

An inseparable connection of two polymeric elements which is capable of rotating with limited torque

Info

Publication number
EP4649242A1
EP4649242A1 EP24711949.8A EP24711949A EP4649242A1 EP 4649242 A1 EP4649242 A1 EP 4649242A1 EP 24711949 A EP24711949 A EP 24711949A EP 4649242 A1 EP4649242 A1 EP 4649242A1
Authority
EP
European Patent Office
Prior art keywords
inseparable connection
content
polymeric
fibre content
polymeric elements
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.)
Pending
Application number
EP24711949.8A
Other languages
German (de)
French (fr)
Inventor
Sebastjan STERNAD
Miro RESEK
Tadej VUGA
Iztok CERNALOGAR
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.)
Polycom Skofja Loka d o o
Original Assignee
Polycom Skofja Loka d o o
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 Polycom Skofja Loka d o o filed Critical Polycom Skofja Loka d o o
Publication of EP4649242A1 publication Critical patent/EP4649242A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
    • F16C11/0623—Construction or details of the socket member
    • F16C11/0657—Construction or details of the socket member the socket member being mainly made of plastics
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0685—Manufacture of ball-joints and parts thereof, e.g. assembly of ball-joints
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/201—Composition of the plastic
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
    • F16C33/205—Multilayer structures, e.g. sleeves comprising a plastic lining with two layers
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
    • F16C2208/04—Glass fibres
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding

Definitions

  • the subject of the invention is an inseparable connection of two polymeric elements, which is capable of rotating with limited torque and transferring axial forces, while simultaneously allowing rotation.
  • the invention will be described in more detail by way of a threaded insert made of a polymeric material in a ball joint, where the rotation is not completely free, the torque is limited within certain values. It does not require any additional components to provide the rotation function.
  • the materials of which this fastening element is made may be from the polyamide family.
  • the technical problem solved by the invention is such a selection of materials for the execution of an inseparable connection of two polymeric elements that allows the structure of the functional parts of the elements and the very selection of the materials for the functional parts to be such as to permit the transmission of axial forces, while at the same time ensuring the rotation of individual elements with limited torque.
  • All the functional parts of the rotary connection are configured in such a way that they can be mass-produced using polymer injection moulding technology.
  • the inseparable connection of two elements is made possible in the current version by a metal threaded insert which is capable of transmitting forces and allows rotation with limited torque.
  • Two processes are needed to make the whole assembly. First, production of the metal insert (including cleaning, coating/corrosion protection, packaging) and then, in a second process, insertion of the insert into a tool and injection moulding of same.
  • the threaded insert for the inseparable connection of two polymeric elements is made of a polymer.
  • Such a threaded insert also allows force transmission and rotation with limited torque, but is manufactured in a single process as a two-component insert and is completely recyclable, requiring no coating.
  • the mating material of the threaded insert 1 has an injection melt temperature of 315°C to 360°C, a glass fibre content of 0% v/v, a carbon fibre content of 20% v/v to 50% v/v, a PFTE lubricant content of 0% v/v, while the mating material of the ball socket 2 has an injection melt temperature of 280°C to 305°C, a glass fibre content of 20% v/v to 50% v/v, a carbon fibre content of 0% v/v, a PFTE lubricant content of 5% v/v to 15% v/v.
  • An embodiment explaining the inseparable connection of two polymeric elements, which is capable of rotation with limited torque, of the invention and which will be used to explain the application of the invention, is a ball joint assembly made of polymeric materials.
  • FIG. 1 polymeric ball joint assembly
  • Figure 2 functional elements of a ball joint assembly
  • Figure 3 functional elements of a threaded insert
  • FIG. 4 functional elements of a retaining ring.
  • the ball joint consists of a threaded insert 1 which is co-moulded with a polymeric material forming the geometry of a socket 2. The tensile and compressive forces are transmitted from the threaded insert 1 via the ball socket 2 to a ball pin 3.
  • the ball pin 3 is made of metal material by a turning process.
  • the threaded insert 1 is made by polymeric material injection moulding, where the injection melt temperature is 315°C to 360°C, a glass fibre content is 0% v/v, a carbon fibre content is 20% v/v to 50% v/v, a PFTE lubricant content is 0% v/v.
  • the ball socket 2 is made by polymeric material injection moulding, where the injection melt temperature is 280°C to 305°C, the glass fibre content is 20% v/v to 50% v/v, the carbon fibre content is 0% v/v, the PFTE lubricant content is 5% v/v to 15% v/v.
  • the threaded insert 1 consists of the following functional parts: a flange 4 which is a restraining part used in the assembly; a thread 5 which is located inside a connecting roller 7 and transmits the forces from a piston rod to the threaded insert 1 , the connecting roller 7 connecting the thread 5 inside and a retaining ring 6.
  • the outer surface of the connecting roller 7 allows controlled rotation of the threaded insert 1 in the ball socket 2.
  • the retaining ring 6 consists of an inclined passage 9 adapted to accommodate mated polymeric materials.
  • the inclined passage 9 is delimited by a lower rounding 8 and an upper taper 10.
  • the passage 9 and the taper 10 depend on the material chosen for the threaded insert 1 , while the shape itself is determined by tests.
  • the axial force transmission is solved by a customised design of the retaining ring 6, which is suitable for polymeric materials and can also be mass-produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The subject of the invention is an inseparable connection of two polymeric elements, which is capable of rotating with limited torque and transferring axial forces, while simultaneously allowing rotation. The invention will be described in more detail by way of a threaded insert made of a polymeric material in a ball joint, where the rotation is not completely free, the torque is limited within certain values. The invention is explained in more detail by way of an embodiment explaining the inseparable connection of two polymeric elements, of which a first element is a threaded insert (1) and a second element is a ball socket (2) and the material of the first element has an injection melt temperature of 315°C to 360°C, a glass fibre content of 0% v/v, a carbon fibre content of 20% v/v to 50% v/v, a PFTE lubricant content of 0% v/v, while the material of the second element has an injection melt temperature of 280°C to 305°C, a glass fibre content of 20% v/v to 50% v/v, a carbon fibre content of 0% v/v, a PFTE lubricant content of 5% v/v to 15% v/v.

Description

AN INSEPARABLE CONNECTION OF TWO POLYMERIC ELEMENTS WHICH IS CAPABLE OF ROTATING WITH LIMITED TORQUE
The subject of the invention is an inseparable connection of two polymeric elements, which is capable of rotating with limited torque and transferring axial forces, while simultaneously allowing rotation. The invention will be described in more detail by way of a threaded insert made of a polymeric material in a ball joint, where the rotation is not completely free, the torque is limited within certain values. It does not require any additional components to provide the rotation function. The materials of which this fastening element is made may be from the polyamide family.
The technical problem solved by the invention is such a selection of materials for the execution of an inseparable connection of two polymeric elements that allows the structure of the functional parts of the elements and the very selection of the materials for the functional parts to be such as to permit the transmission of axial forces, while at the same time ensuring the rotation of individual elements with limited torque. All the functional parts of the rotary connection are configured in such a way that they can be mass-produced using polymer injection moulding technology.
The inseparable connection of two elements, which is capable of rotation with limited torque, is made possible in the current version by a metal threaded insert which is capable of transmitting forces and allows rotation with limited torque. Two processes are needed to make the whole assembly. First, production of the metal insert (including cleaning, coating/corrosion protection, packaging) and then, in a second process, insertion of the insert into a tool and injection moulding of same. According to the invention, the threaded insert for the inseparable connection of two polymeric elements is made of a polymer. Such a threaded insert also allows force transmission and rotation with limited torque, but is manufactured in a single process as a two-component insert and is completely recyclable, requiring no coating.
The problem of limited rotation of the individual parts is solved by an appropriate selection of mating materials of which the elements - a threaded insert 1 and a ball socket 2, which are part of the inseparable connection, are made and are manufactured in one process.
The mating material of the threaded insert 1 has an injection melt temperature of 315°C to 360°C, a glass fibre content of 0% v/v, a carbon fibre content of 20% v/v to 50% v/v, a PFTE lubricant content of 0% v/v, while the mating material of the ball socket 2 has an injection melt temperature of 280°C to 305°C, a glass fibre content of 20% v/v to 50% v/v, a carbon fibre content of 0% v/v, a PFTE lubricant content of 5% v/v to 15% v/v.
An embodiment explaining the inseparable connection of two polymeric elements, which is capable of rotation with limited torque, of the invention and which will be used to explain the application of the invention, is a ball joint assembly made of polymeric materials.
The embodiment is shown in figures representing:
Figure 1 polymeric ball joint assembly;
Figure 2 functional elements of a ball joint assembly;
Figure 3: functional elements of a threaded insert;
Figure 4: functional elements of a retaining ring. The ball joint consists of a threaded insert 1 which is co-moulded with a polymeric material forming the geometry of a socket 2. The tensile and compressive forces are transmitted from the threaded insert 1 via the ball socket 2 to a ball pin 3.
The ball pin 3 is made of metal material by a turning process. The threaded insert 1 is made by polymeric material injection moulding, where the injection melt temperature is 315°C to 360°C, a glass fibre content is 0% v/v, a carbon fibre content is 20% v/v to 50% v/v, a PFTE lubricant content is 0% v/v. The ball socket 2 is made by polymeric material injection moulding, where the injection melt temperature is 280°C to 305°C, the glass fibre content is 20% v/v to 50% v/v, the carbon fibre content is 0% v/v, the PFTE lubricant content is 5% v/v to 15% v/v.
The threaded insert 1 consists of the following functional parts: a flange 4 which is a restraining part used in the assembly; a thread 5 which is located inside a connecting roller 7 and transmits the forces from a piston rod to the threaded insert 1 , the connecting roller 7 connecting the thread 5 inside and a retaining ring 6.
The outer surface of the connecting roller 7 allows controlled rotation of the threaded insert 1 in the ball socket 2.
The retaining ring 6 consists of an inclined passage 9 adapted to accommodate mated polymeric materials. The inclined passage 9 is delimited by a lower rounding 8 and an upper taper 10. The passage 9 and the taper 10 depend on the material chosen for the threaded insert 1 , while the shape itself is determined by tests. The axial force transmission is solved by a customised design of the retaining ring 6, which is suitable for polymeric materials and can also be mass-produced.

Claims

1. An inseparable connection of two polymeric elements, which is capable of rotating with limited torque, characterized in that a combination of polymeric materials is used for its production, wherein the material of a first element has an injection melt temperature of 315°C to 360°C, a glass fibre content of 0% v/v, a carbon fibre content of 20% v/v to 50% v/v, a PFTE lubricant content of 0% v/v, while the material of a second element has an injection melt temperature of 280°C to 305°C, a glass fibre content of 20% v/v to 50% v/v, a carbon fibre content of 0% v/v, PFTE lubricant content of 5% v/v to 15% v/v.
2. The inseparable connection of two polymeric elements according to claim 1, wherein the inseparable connection is a ball joint, characterized in that the first element is a threaded insert (1) and the second element is a ball socket (2).
3. The inseparable connection of two polymeric elements according to claim 2, characterized in that they are both produced by an injection moulding process.
4. The inseparable connection of two polymeric elements according to claims 2 and 3, characterized in that a retaining ring (6) is formed on a connecting roller (7), said ring allowing force transmission from the thread (5) to the ball socket (2), that the geometry of the retaining ring (6) consists of an inclined passage (9) delimited by a lower rounding (8) and an upper taper (10).
EP24711949.8A 2023-01-12 2024-01-10 An inseparable connection of two polymeric elements which is capable of rotating with limited torque Pending EP4649242A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SI202300008A SI26459A (en) 2023-01-12 2023-01-12 An inseparable connection of two polymer elements, in which rotation with a limited torque is enabled
PCT/SI2024/050004 WO2024151225A1 (en) 2023-01-12 2024-01-10 An inseparable connection of two polymeric elements which is capable of rotating with limited torque

Publications (1)

Publication Number Publication Date
EP4649242A1 true EP4649242A1 (en) 2025-11-19

Family

ID=90365317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24711949.8A Pending EP4649242A1 (en) 2023-01-12 2024-01-10 An inseparable connection of two polymeric elements which is capable of rotating with limited torque

Country Status (3)

Country Link
EP (1) EP4649242A1 (en)
SI (1) SI26459A (en)
WO (1) WO2024151225A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016713B4 (en) * 2007-04-04 2011-07-14 Saint-Gobain Performance Plastics Pampus GmbH, 47877 Spherical plain bearings
FR3087510B1 (en) * 2018-10-22 2021-12-31 Skf Aerospace France Sas Flanged Bearing Outer Ring Unit
JP2020165445A (en) * 2019-03-28 2020-10-08 Ntn株式会社 Plain bearings for electric water pumps
EP4211359A2 (en) * 2020-09-08 2023-07-19 Dover Pumps & Process Solutions Segment, Inc. Functionally graded composite structures

Also Published As

Publication number Publication date
SI26459A (en) 2024-07-31
WO2024151225A1 (en) 2024-07-18

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