GB2172435A - Distributor rotor for ignition distributors of internal combustion engines - Google Patents

Distributor rotor for ignition distributors of internal combustion engines Download PDF

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Publication number
GB2172435A
GB2172435A GB08604240A GB8604240A GB2172435A GB 2172435 A GB2172435 A GB 2172435A GB 08604240 A GB08604240 A GB 08604240A GB 8604240 A GB8604240 A GB 8604240A GB 2172435 A GB2172435 A GB 2172435A
Authority
GB
United Kingdom
Prior art keywords
eye
electrode
distributor
finger
tension spring
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
GB08604240A
Other versions
GB8604240D0 (en
GB2172435B (en
Inventor
Heinz Haug
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 GB8604240D0 publication Critical patent/GB8604240D0/en
Publication of GB2172435A publication Critical patent/GB2172435A/en
Application granted granted Critical
Publication of GB2172435B publication Critical patent/GB2172435B/en
Expired legal-status Critical Current

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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F16F1/123—Attachments or mountings characterised by the ends of the spring being specially adapted, e.g. to form an eye for engagement with a radial insert
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/022—Details of the distributor rotor or electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

The distributor rotor (10) has an insulator (11), which is secured on to the distributor shaft (12) and conducts the ignition energy delivered by the centre electrode (15) via the contact piece (14) to the distributor electrodes (13). A centrifugal electrode (23) is connected to the contact piece (14) by a spiral tension spring (21) and, whenever a critical speed of the distributor rotor (10) is reached, discharges the ignition energy to the side electrode (25) against the force of the spiral tension spring (21). The one eye (20) of the spiral tension spring (21) is suspended in an opening (29) of the centrifugal electrode (23) and the other eye (22) is suspended on a finger (19) of the contact piece (14). Both suspensions are made rigidly, i.e. free from reciprocal relative movements of the parts in contact with each other eg. by wedging (figure 4), distortion of the suspension against the eye, moulding around the eye or by the clamping action of plural turns of the eye against the suspension. <IMAGE>

Description

SPECIFICATION Distributor rotor for ignition distributors of internal combustion engines Prior art The invention is based on a distributor rotor for ignition distributors of internal combustion engines according to the preamble of Claim 1. In the case of a distributor rotor such is known from German Patent Specification 2,203,016, it cannot be ruled out that the suspension point of this sleeve wears relatively severely at the opening or at the finger. This vibration-induced wear reduces the pretension of the spiral tension spring, which shifts the cut-off time of the internal combustion engine in an inadmissible way and in certain circumstances impairs the function of the internal combustion engine.
Advantages of the invention With the distributor rotor ignition distributors of internal combustion engines according to the invention, the problem of wear set forth in the abovementioned prior art is solved by technically simple means, so that the function is not impaired during the entire operating time of the internal combustion engine.
Avantageous developments of the invention are described in the subclaims.
Drawing Five exemplary embodiments of the invention are illustrated in the drawing and explained more closely in the description of the figures, in which, in each case in enlarged representation, Figure 1 shows a distributor rotor for injection distributors of internal combustion engines in axial cross-section; Figures 2 to 4 show the first to third examplary embodiments in sectional representation as per section lI-Il in Figure 1; and Figures 5 and 6 show the fourth and fifth exemplary embodiments in sectional representation as per section V-V in Figure 1.
Description ofthe exemplary embodiments A distributor rotor 10 has an insulator 11 fitted rotationally rigidly on a distributor shaft 12 and having a distributor electrode 13, to which the ignition energy is supplied in a way not shown from a centre electrode 15 arranged in an insulating cap 16 via a contact piece 14. During the rotation of the insulator 11 about the axis 17, the distributor electrode 13 leads the ignition energy to each of a number of fixed electrodes 18 inserted in the insulating cap 16.
A bent-off finger 19 of the contact piece 14 forms the suspension point for one eye 22 of a spiral tension spring 21, the other eye 20 of which is suspended in a centrifugal electrode 23; this electrode is secured in a sleeve 24 of insulating material which, for its part, receives the spiral tension spring 21. A side electrode 25 fixed in the insulator 11 contacts via a leaf spring 26 with the distributor shaft 12 and has an end section 27 which is on the radial level ofthe centrifugal electrode. Whenever a predetermined critical speed of the distributor rotor 10, i.e.
of the internal combustion engine, is reached, the centrifugal electrode 23 moves in the direction of arrow 28 to the final section 27 of the side electrode 25, so that the ignition energy is discharged to the distributor shaft 12 at earth potential.
According to Figure 2, in the end region of the centrifugal electrode 23 a hole 29 is arranged as an opening in which the one eye 20 of the spiral tension spring 21 is suspended with pretension and thereby pulls the centrifugal electrode 23 in the direction of arrow 30. The hole 29 is filled out by means of an adhesive 31 - in particular by means of a cast resin whereby the suspension of the eye 20 in the hole 29 is made rigidly (free from vibration, without reciprocal relative movement).
The exemplary embodiment in Figure 3 shows the end region of the centrifugal electrode 23 with the hole 29, between which and the face edge 32 the centrifugal electrode 23 is divided into two halves 34, 35 by a slit 33. The two halves are spread open and the one eye 20 suspended in the hole 29 is retained free from vibration by squeezing the two halves 34, 35; squeezing is performed by two tools 36.
In the examplary embodiment according to Figure 4, a wedge 39 is inserted (driven) between the eye 20 and the inside wall 38 of the hole 29; this likewise effects the previously described vibrationallyfree suspension.
The exemplary embodiment of the vibrationally free suspension in Figure 5 shows the spiral tension spring 21 with a twin eye 22', which is offset in the direction of the axis 40 and forms an intermediate eye 41. Into this is inserted the finger 19 of the contact piece 14 (Figure 1), i.e. the intermediate eye 41 is pushed onto the finger 19 and thus has such a pretension that the finger 19 is retained in its position free from vibration. In the same way, the finger 19' or 19" could, as illustrated in dashed lines, be secured free from vibration in one of the two neighbouring sections.
In the exemplary embodiment in Figure 6, the spiral tension spring 21 has a doubly wound twin eye 22", which is wound transverse to the axis 40 and spread. The finger 19 of the contact piece 14 is inserted into the twin eye 22" and the latter is subsequently pressed congruently such that the finger 19 is retained in its position by the spring tension.
1. Distributor rotor for ignition distributors of internal combustion engines with an insulator which is secured on a distributor shaft and conducts the ignition energy delivered by a centre electrode of the ignition distributor via a contact piece to distributor electrodes, and with a centrifugal electrode which is connected to the contact piece by a spiral tension spring having two eyes and, whenever a critical speed of the distributor rotor is reached, moves against the force of the spiral tension spring in the direction of a side electrode of the distributor rotor and thereby discharges the ignition energy to the side electrode, and the one eye of the spiral tension spring being suspended in an opening of the
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Distributor rotor for ignition distributors of internal combustion engines Prior art The invention is based on a distributor rotor for ignition distributors of internal combustion engines according to the preamble of Claim 1. In the case of a distributor rotor such is known from German Patent Specification 2,203,016, it cannot be ruled out that the suspension point of this sleeve wears relatively severely at the opening or at the finger. This vibration-induced wear reduces the pretension of the spiral tension spring, which shifts the cut-off time of the internal combustion engine in an inadmissible way and in certain circumstances impairs the function of the internal combustion engine. Advantages of the invention With the distributor rotor ignition distributors of internal combustion engines according to the invention, the problem of wear set forth in the abovementioned prior art is solved by technically simple means, so that the function is not impaired during the entire operating time of the internal combustion engine. Avantageous developments of the invention are described in the subclaims. Drawing Five exemplary embodiments of the invention are illustrated in the drawing and explained more closely in the description of the figures, in which, in each case in enlarged representation, Figure 1 shows a distributor rotor for injection distributors of internal combustion engines in axial cross-section; Figures 2 to 4 show the first to third examplary embodiments in sectional representation as per section lI-Il in Figure 1; and Figures 5 and 6 show the fourth and fifth exemplary embodiments in sectional representation as per section V-V in Figure 1. Description ofthe exemplary embodiments A distributor rotor 10 has an insulator 11 fitted rotationally rigidly on a distributor shaft 12 and having a distributor electrode 13, to which the ignition energy is supplied in a way not shown from a centre electrode 15 arranged in an insulating cap 16 via a contact piece 14. During the rotation of the insulator 11 about the axis 17, the distributor electrode 13 leads the ignition energy to each of a number of fixed electrodes 18 inserted in the insulating cap 16. A bent-off finger 19 of the contact piece 14 forms the suspension point for one eye 22 of a spiral tension spring 21, the other eye 20 of which is suspended in a centrifugal electrode 23; this electrode is secured in a sleeve 24 of insulating material which, for its part, receives the spiral tension spring 21. A side electrode 25 fixed in the insulator 11 contacts via a leaf spring 26 with the distributor shaft 12 and has an end section 27 which is on the radial level ofthe centrifugal electrode. Whenever a predetermined critical speed of the distributor rotor 10, i.e. of the internal combustion engine, is reached, the centrifugal electrode 23 moves in the direction of arrow 28 to the final section 27 of the side electrode 25, so that the ignition energy is discharged to the distributor shaft 12 at earth potential. According to Figure 2, in the end region of the centrifugal electrode 23 a hole 29 is arranged as an opening in which the one eye 20 of the spiral tension spring 21 is suspended with pretension and thereby pulls the centrifugal electrode 23 in the direction of arrow 30. The hole 29 is filled out by means of an adhesive 31 - in particular by means of a cast resin whereby the suspension of the eye 20 in the hole 29 is made rigidly (free from vibration, without reciprocal relative movement). The exemplary embodiment in Figure 3 shows the end region of the centrifugal electrode 23 with the hole 29, between which and the face edge 32 the centrifugal electrode 23 is divided into two halves 34, 35 by a slit 33. The two halves are spread open and the one eye 20 suspended in the hole 29 is retained free from vibration by squeezing the two halves 34, 35; squeezing is performed by two tools 36. In the examplary embodiment according to Figure 4, a wedge 39 is inserted (driven) between the eye 20 and the inside wall 38 of the hole 29; this likewise effects the previously described vibrationallyfree suspension. The exemplary embodiment of the vibrationally free suspension in Figure 5 shows the spiral tension spring 21 with a twin eye 22', which is offset in the direction of the axis 40 and forms an intermediate eye 41. Into this is inserted the finger 19 of the contact piece 14 (Figure 1), i.e. the intermediate eye 41 is pushed onto the finger 19 and thus has such a pretension that the finger 19 is retained in its position free from vibration. In the same way, the finger 19' or 19" could, as illustrated in dashed lines, be secured free from vibration in one of the two neighbouring sections. In the exemplary embodiment in Figure 6, the spiral tension spring 21 has a doubly wound twin eye 22", which is wound transverse to the axis 40 and spread. The finger 19 of the contact piece 14 is inserted into the twin eye 22" and the latter is subsequently pressed congruently such that the finger 19 is retained in its position by the spring tension. CLAIMS
1. Distributor rotor for ignition distributors of internal combustion engines with an insulator which is secured on a distributor shaft and conducts the ignition energy delivered by a centre electrode of the ignition distributor via a contact piece to distributor electrodes, and with a centrifugal electrode which is connected to the contact piece by a spiral tension spring having two eyes and, whenever a critical speed of the distributor rotor is reached, moves against the force of the spiral tension spring in the direction of a side electrode of the distributor rotor and thereby discharges the ignition energy to the side electrode, and the one eye of the spiral tension spring being suspended in an opening of the centrifugal electrode and the other eye being suspended on a finger of the contact piece, characterised in that the suspension of the one eye (20) in the opening (29) of the centrifugal electrode (23) and of the other eye (22,22') on the finger (19) of the contact piece (14) is arranged rigidly.
2. Rotor according to Claim 1, characterised in that the opening (29) of the centrifugal electrode (23) receiving the one eye (20) is filled out by means of a filler (31) - in particalar by means of a cast resin.
3. Rotor according to Claim 1, characterised in that the centrifugal electrode (23) is divided by a slit (33) between the opening (29) and its face edge (32) into two halves (34,35), between which the one eye (20) is retained by squeezing the two halves (34,35).
4. Rotor according to Claim 1, characterised in that a wedge (39) is inserted between the one eye (20) and the inside wall (38) of the opening (29) of the centrifugal electrode (23).
5. Rotor according to Claim 1, characterised in that the spiral tension spring (21) has a double eye (22'), which is offset in the direction of the axis (40) and forms an intermediate eye (41), and in that the finger (19) of the contact piece (14) inserted in the intermediate eye (41) is retained in its position by spring tension.
6. Rotor according to Claim 1, characterised in that the spiral tension spring (21) has an at least doubly wound twin eye (22"), which is spread in itself and transverse to the axis (40) of the spiral tension spring (21) such that the finger (19) of the contact piece (14) inserted into the twin eye (22") is retained in its position by spring tension.
7. Any of the embodiments of a distributor rotor substantially as herein described with reference to the accompanying drawings.
GB8604240A 1985-03-16 1986-02-20 Distributor rotor for ignition distributors of internal combustion engines Expired GB2172435B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19858507841 DE8507841U1 (en) 1985-03-16 1985-03-16 Distributor rotor for ignition distributors of internal combustion engines

Publications (3)

Publication Number Publication Date
GB8604240D0 GB8604240D0 (en) 1986-03-26
GB2172435A true GB2172435A (en) 1986-09-17
GB2172435B GB2172435B (en) 1989-06-21

Family

ID=6778779

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8604240A Expired GB2172435B (en) 1985-03-16 1986-02-20 Distributor rotor for ignition distributors of internal combustion engines

Country Status (3)

Country Link
JP (1) JPS61212669A (en)
DE (1) DE8507841U1 (en)
GB (1) GB2172435B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB322638A (en) * 1928-04-18 1929-12-12 Willy Knoll Improvements in spring upholstery
GB573875A (en) * 1943-12-21 1945-12-11 Arthur Abbey Improved electric coupling embodying a resistance
GB1336809A (en) * 1971-03-16 1973-11-14 Citroen Sa Speed limiters for internal combustion engines with controlled coil ignition
GB1412481A (en) * 1972-01-22 1975-11-05 Bosch Gmbh Robert Rotors for ignition distributors of internal combustion engines
GB2038107A (en) * 1978-12-28 1980-07-16 Bosch Gmbh Robert Anchoring the end of a spiral spring in an electric low-power machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB322638A (en) * 1928-04-18 1929-12-12 Willy Knoll Improvements in spring upholstery
GB573875A (en) * 1943-12-21 1945-12-11 Arthur Abbey Improved electric coupling embodying a resistance
GB1336809A (en) * 1971-03-16 1973-11-14 Citroen Sa Speed limiters for internal combustion engines with controlled coil ignition
GB1412481A (en) * 1972-01-22 1975-11-05 Bosch Gmbh Robert Rotors for ignition distributors of internal combustion engines
GB2038107A (en) * 1978-12-28 1980-07-16 Bosch Gmbh Robert Anchoring the end of a spiral spring in an electric low-power machine

Also Published As

Publication number Publication date
GB8604240D0 (en) 1986-03-26
DE8507841U1 (en) 1986-07-17
JPS61212669A (en) 1986-09-20
GB2172435B (en) 1989-06-21

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PCNP Patent ceased through non-payment of renewal fee