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GB1589088A - Drive arrangement for an ignition distributor of an internal combustion engine - Google Patents

Drive arrangement for an ignition distributor of an internal combustion engine Download PDF

Info

Publication number
GB1589088A
GB1589088A GB3385777A GB3385777A GB1589088A GB 1589088 A GB1589088 A GB 1589088A GB 3385777 A GB3385777 A GB 3385777A GB 3385777 A GB3385777 A GB 3385777A GB 1589088 A GB1589088 A GB 1589088A
Authority
GB
United Kingdom
Prior art keywords
recesses
axial end
transmission element
depth
shaft
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.)
Expired
Application number
GB3385777A
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 GB1589088A publication Critical patent/GB1589088A/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/78—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members shaped as an elastic disc or flat ring, arranged perpendicular to the axis of the coupling parts, different sets of spots of the disc or ring being attached to each coupling part, e.g. Hardy couplings
    • 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
    • F02P7/10—Drives of distributors or of circuit-makers or -breakers

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)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Gears, Cams (AREA)

Description

(54) A DRIVE ARRANGEMENT FOR AN IGNITION DISTRIBUTOR OF AN INTERNAL COMBUSTION ENGINE (71) We, ROBERT BOSCH GMBH, a German Company, of Postfach 50, 7 Stuttgart 1, Federal Republic of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to apparatus comprising an ignition distributor of an internal combustion engine, and a drive arrangement therefor.
It is an object of the present invention to provide such apparatus in which the drive arrangement comprises means to damp vibrations, in particular, torsional vibrations in the distributor shaft and thereby prevent undesired displacement of the ignition firing point.
A damping coupling is already known for an ignition distributor in which the distributor shaft ends in a tongue which engages in a cup-shaped connecting piece of the drive element of the engine, said drive element also being in the form of a shaft. In order to suppress torsional vibrations of the distributor shaft which may cause undesired displacement of the firing point, an oil flow supplied by the oil pump surrounds this coupling. This manner of damping torsional vibrations is recommended where the oil pump is simultaneously driven by the distributor shaft.
To damp such torsional vibrations in the distributor shaft of an ignition distributor it is also known practice to dispose friction discs alternately on the distributor shaft and on a sleeve embracing said shaft. Although this arrangement takes up little room, the power loss incurred through friction creates problems of heat transmission. An ignition distributor is also known whose distributor shaft is supported in a bearing part which, apart from its actual supporting function, is supposed to damp any torsional vibrations in the drive shaft. In order to fulfil both these functions, the bearing must be relatively narrowly tolerated and be given maintenance throughout its life.
According to the present invention there is provided apparatus comprising an ignition distributor of an internal combustion engine and a drive arrangement for transmitting drive from a drive element to the distributor shaft the arrangement comprising a three-piece coupling by means of which the shaft and the drive element are coupled together, the coupling comprising a first rigid coupling part adapted to be made fast with a portion of the distributor shaft, a second rigid coupling part formed as a portion of the drive element or to be secured thereto, and a transmission element of resilient material which couples the two coupling parts.
The drive arrangement according to the present invention has the advantage over the prior art that the three-part coupling may be disposed as a compact damping element both between the engine and the ignition distributor drive and in the drive itself.
In order to transmit the force from the drive element to the distributor shaft uniformly non-abrasively, it is proposed to insert metal caps in the recesses of the transmission element.
The invention will hereinafter be further described by way of example with reference to the accompanying drawings, in which: Figure 1 is a partially sectioned side view of part of a first embodiment of an apparatus constructed in accordance with the invention; Figure 2 is a partially sectioned side view of part of a second embodiment of an apparatus constructed in accordance with the invention; Figure 3 is a section of the embodiment of Figure 2 taken along the line III-III; and Figure 4 is a partially sectioned side view of part of a third embodiment of an apparatus constructed in accordance with the invention.
Of the ignition distributor 10 for internal combustion engines shown in Figure 1, its housing 11, boss 12 secured thereto and a distributor shaft 13 rotatably journalled in the boss are shown. A pinion 14 is a drive element which meshes with a helical gear (not shown) of the camshaft of the engine, is rotatably journalled on the distributor shaft 13 and axially secured by a ring 15.
A three-piece claw coupling 16 basically comprises a first outer coupling part 17, a second outer coupling part 18 and a transmission element 19 which connects these parts.
The transmission element is made of resilient material- for example rubber or synthetic material - and is basically sleeve-like with two axial end surfaces 20 and has a bore 21 which accommodates the distributor shaft 13. Two recesses 22 are cut diametrically opposed to one another in each surface 20 of the element 19 and a metallic cap 23 is placed in each recess 22. The first outer coupling part 17 is disposed non-rotatably by means of a pin 24 on the distributor shaft 13 and has two claws 25 which engage in the caps 23 of the recess 22.
Similarly, two claws 25 protrude from the second outer coupling part 18 and engage in the caps 23 of the recesses 23 of the opposite surfaces 20 of the element 19.
The force to be transmitted, i.e. the torque, is transmitted by a helical gear (not shown) of the camshaft to the pinion 14 which conveys the force by way of the claws 25, the caps 23, the element 19 onward to the first outer coupling part 17 and from there to the distributor shaft 13.
In Figures 2 and 3, identical reference numerals designate identical or similar parts to those in Figure 1. Here, the claw coupling is designated 36 which has as a drive element an engine shaft 34 which acts as a second outer coupling part and from which similarly two claws 25 protrude. The transmission element 39 made from resilient material has two recesses 22 on each side, of which those facing the first part 17 on the ignition distributor shaft 33 lie centrally relative to the diametral line 37 and those facing the engine shaft 34 are disposed in such a manner that their common centre line 35 is displaced relative to the diametral line 37. The diametral lines 37 and the centre line 35 form an angle of 90" and the centre line 35 is displaced relative to the axis of rotation 38. Moreover, the bases of recesses 22 of one surface 20 of the transmission element 39 are axially displaced from those of the other surface 20, that is, the axial length of the transmission element is greater than the depth of the recesses in one axial end surface plus the depth of the recesses in the other axial end surface. Transmission of the force or of the torque occurs in a similar manner to that already described in Figure 1.
The difference between the claw coupling 46 shown in Figure 4 and those of the previous Figures is that in the coupling of Figure 4 the recesses 22 in the two axial end surfaces 20 are disposed axially closer to one another than in the couplings of the previous Figures so that the bases of the recesses respectively of the two surfaces lie in substantially the same plane i.e. the axial length of the element 49 is substantially equal to the depth of the recesses in one axial end surface plus the depth of the recesses in the other axial end surface any may be reduced as a result.
WHAT WE CLAIM IS: 1. Apparatus comprising an ignition distributor of an internal combustion engine and a drive arrangement for transmitting drive from a drive element to the distributor shaft, the arrangement comprising a three-piece coupling by means of which the shaft and the drive element are coupled together, the coupling comprising a first rigid coupling part adapted to be made fast with a portion of the distributor shaft, a second rigid coupling part formed as a portion of the drive element or to be secured thereto, and a transmission element of resilient material which couples the two coupling parts.
2. Apparatus as claimed in Claim 1, in which the transmission element has two axial end surfaces, each surface having opposed recesses in which claws of the two coupling parts engage.
3. Apparatus as claimed in Claim 2, in which each of the axial end surfaces of the transmission element has two opposed recesses.
4. Apparatus as claimed in Claim 2 or 3, in which the diametral lines on which the recesses are disposed form an angle of substantially 900.
5. Apparatus as claimed in Claim 2 or 3, in which at least the recesses in one of the axial end surfaces of the transmission element lie on a diametral line, the common centre line of the other two recesses being offset relative to the axis of rotation.
6. Apparatus as claimed in Claim 4 or 5, wherein the transmission element has an axial length greater than the depth of the recesses in one axial end surface plus the depth of the recesses in the other axial end surface.
7. Apparatus as claimed in Claim 4 or 5, wherein the transmission element has an axial length substantially equal to the depth of the recesses on one axial end surface plus the depth of the recesses in the other axial end surface.
8. Apparatus as claimed in any preceding claim in which the drive element is a pinion which is rotatably journalled on the distributor shaft.
9. Apparatus as claimed in any preceding claim in which the transmission element is sleeve-like and has a bore which accommodates the distributor shaft.
10. Apparatus as claimed in any of Claims 1 to 7 in which the drive element is an engine shaft.
11. Apparatus as claimed in Claim 2 or in any of the preceding Claims 3 to 10 as dependant on Claim 2, in which a cap made of metal is disposed in each recess of the transmission element and each claw engages in a cap.
12. Apparatus constructed and adapted to operate substantially as hereinbefore
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (14)

**WARNING** start of CLMS field may overlap end of DESC **. of the camshaft of the engine, is rotatably journalled on the distributor shaft 13 and axially secured by a ring 15. A three-piece claw coupling 16 basically comprises a first outer coupling part 17, a second outer coupling part 18 and a transmission element 19 which connects these parts. The transmission element is made of resilient material- for example rubber or synthetic material - and is basically sleeve-like with two axial end surfaces 20 and has a bore 21 which accommodates the distributor shaft 13. Two recesses 22 are cut diametrically opposed to one another in each surface 20 of the element 19 and a metallic cap 23 is placed in each recess 22. The first outer coupling part 17 is disposed non-rotatably by means of a pin 24 on the distributor shaft 13 and has two claws 25 which engage in the caps 23 of the recess 22. Similarly, two claws 25 protrude from the second outer coupling part 18 and engage in the caps 23 of the recesses 23 of the opposite surfaces 20 of the element 19. The force to be transmitted, i.e. the torque, is transmitted by a helical gear (not shown) of the camshaft to the pinion 14 which conveys the force by way of the claws 25, the caps 23, the element 19 onward to the first outer coupling part 17 and from there to the distributor shaft 13. In Figures 2 and 3, identical reference numerals designate identical or similar parts to those in Figure 1. Here, the claw coupling is designated 36 which has as a drive element an engine shaft 34 which acts as a second outer coupling part and from which similarly two claws 25 protrude. The transmission element 39 made from resilient material has two recesses 22 on each side, of which those facing the first part 17 on the ignition distributor shaft 33 lie centrally relative to the diametral line 37 and those facing the engine shaft 34 are disposed in such a manner that their common centre line 35 is displaced relative to the diametral line 37. The diametral lines 37 and the centre line 35 form an angle of 90" and the centre line 35 is displaced relative to the axis of rotation 38. Moreover, the bases of recesses 22 of one surface 20 of the transmission element 39 are axially displaced from those of the other surface 20, that is, the axial length of the transmission element is greater than the depth of the recesses in one axial end surface plus the depth of the recesses in the other axial end surface. Transmission of the force or of the torque occurs in a similar manner to that already described in Figure 1. The difference between the claw coupling 46 shown in Figure 4 and those of the previous Figures is that in the coupling of Figure 4 the recesses 22 in the two axial end surfaces 20 are disposed axially closer to one another than in the couplings of the previous Figures so that the bases of the recesses respectively of the two surfaces lie in substantially the same plane i.e. the axial length of the element 49 is substantially equal to the depth of the recesses in one axial end surface plus the depth of the recesses in the other axial end surface any may be reduced as a result. WHAT WE CLAIM IS:
1. Apparatus comprising an ignition distributor of an internal combustion engine and a drive arrangement for transmitting drive from a drive element to the distributor shaft, the arrangement comprising a three-piece coupling by means of which the shaft and the drive element are coupled together, the coupling comprising a first rigid coupling part adapted to be made fast with a portion of the distributor shaft, a second rigid coupling part formed as a portion of the drive element or to be secured thereto, and a transmission element of resilient material which couples the two coupling parts.
2. Apparatus as claimed in Claim 1, in which the transmission element has two axial end surfaces, each surface having opposed recesses in which claws of the two coupling parts engage.
3. Apparatus as claimed in Claim 2, in which each of the axial end surfaces of the transmission element has two opposed recesses.
4. Apparatus as claimed in Claim 2 or 3, in which the diametral lines on which the recesses are disposed form an angle of substantially 900.
5. Apparatus as claimed in Claim 2 or 3, in which at least the recesses in one of the axial end surfaces of the transmission element lie on a diametral line, the common centre line of the other two recesses being offset relative to the axis of rotation.
6. Apparatus as claimed in Claim 4 or 5, wherein the transmission element has an axial length greater than the depth of the recesses in one axial end surface plus the depth of the recesses in the other axial end surface.
7. Apparatus as claimed in Claim 4 or 5, wherein the transmission element has an axial length substantially equal to the depth of the recesses on one axial end surface plus the depth of the recesses in the other axial end surface.
8. Apparatus as claimed in any preceding claim in which the drive element is a pinion which is rotatably journalled on the distributor shaft.
9. Apparatus as claimed in any preceding claim in which the transmission element is sleeve-like and has a bore which accommodates the distributor shaft.
10. Apparatus as claimed in any of Claims 1 to 7 in which the drive element is an engine shaft.
11. Apparatus as claimed in Claim 2 or in any of the preceding Claims 3 to 10 as dependant on Claim 2, in which a cap made of metal is disposed in each recess of the transmission element and each claw engages in a cap.
12. Apparatus constructed and adapted to operate substantially as hereinbefore
particularly described with reference to and as illustrated in Figure 1 of the accompanying drawings.
13. Apparatus constructed and adapted to operate substantially as hereinbefore particularly described with reference to and as illustrated in Figures 2 and 3 of the accompanying drawings.
14. Apparatus constructed and adapted to operate substantially as hereinbefore particularly described with reference to and as illustrated in Figure 4 of the accompanying drawings.
GB3385777A 1976-08-14 1977-08-12 Drive arrangement for an ignition distributor of an internal combustion engine Expired GB1589088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762636651 DE2636651C2 (en) 1976-08-14 1976-08-14 Ignition distributors for internal combustion engines

Publications (1)

Publication Number Publication Date
GB1589088A true GB1589088A (en) 1981-05-07

Family

ID=5985450

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3385777A Expired GB1589088A (en) 1976-08-14 1977-08-12 Drive arrangement for an ignition distributor of an internal combustion engine

Country Status (7)

Country Link
AU (1) AU2709077A (en)
BR (1) BR7705340A (en)
DE (1) DE2636651C2 (en)
ES (1) ES461575A1 (en)
FR (1) FR2361549A1 (en)
GB (1) GB1589088A (en)
IT (1) IT1084409B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122724A (en) * 1982-05-26 1984-01-18 Skf Kugellagerfabriken Gmbh Torque transmitting coupling
DE3446237A1 (en) * 1984-12-19 1986-06-19 Robert Bosch Gmbh, 7000 Stuttgart CLUTCH BODIES IN A INTERNAL COMBUSTION ENGINE BETWEEN THE CAMSHAFT AND THE IGNITION DISTRIBUTION SHAFT
GB2192437A (en) * 1986-07-10 1988-01-13 Sanden Corp Electromagnetic clutch with torsional etc. damping
GB2192677A (en) * 1986-07-14 1988-01-20 Sanden Corp Electromagnetic clutch with torsional etc damping
US4942856A (en) * 1988-09-10 1990-07-24 Robert Bosch Gmbh Ignition distributor for an internal combustion engine
GB2245822A (en) * 1990-06-25 1992-01-15 Wang Tsung Hsi A drinking vessel washing machine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930134A1 (en) * 1979-07-25 1981-02-12 Bosch Gmbh Robert IGNITION DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINES
JPS5912161A (en) * 1982-07-13 1984-01-21 Mitsubishi Electric Corp Engine ignition timing control device
US4464142A (en) * 1983-02-03 1984-08-07 General Motors Corporation Ignition distributor shaft coupler
DE3418152A1 (en) * 1984-05-16 1985-11-28 Robert Bosch Gmbh, 7000 Stuttgart IGNITION DISTRIBUTOR FOR INTERNAL COMBUSTION ENGINES
FR2615288B1 (en) * 1987-05-12 1989-09-22 Commissariat Energie Atomique AUTOMATIC METHOD OF IDENTIFYING DEFECTS BY ULTRASOUND AND SYSTEM THEREOF
DE102016109507A1 (en) * 2016-05-24 2017-11-30 Claas Saulgau Gmbh Agricultural machine clutch and agricultural machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1507270A (en) * 1966-11-15 1967-12-29 Simca Automobiles Sa Further training in rotary organ drives
US3662726A (en) * 1970-04-13 1972-05-16 Gen Motors Corp Distributor drive arrangement
DE2550501C3 (en) * 1975-11-11 1979-01-25 Ford-Werke Ag, 5000 Koeln Distributor ignition drive for internal combustion engines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122724A (en) * 1982-05-26 1984-01-18 Skf Kugellagerfabriken Gmbh Torque transmitting coupling
DE3446237A1 (en) * 1984-12-19 1986-06-19 Robert Bosch Gmbh, 7000 Stuttgart CLUTCH BODIES IN A INTERNAL COMBUSTION ENGINE BETWEEN THE CAMSHAFT AND THE IGNITION DISTRIBUTION SHAFT
GB2192437A (en) * 1986-07-10 1988-01-13 Sanden Corp Electromagnetic clutch with torsional etc. damping
US4804075A (en) * 1986-07-10 1989-02-14 Sanden Corporation Electromagnetic clutch
GB2192437B (en) * 1986-07-10 1990-04-25 Sanden Corp Electromagnetic clutch
GB2192677A (en) * 1986-07-14 1988-01-20 Sanden Corp Electromagnetic clutch with torsional etc damping
US4860867A (en) * 1986-07-14 1989-08-29 Sanden Corporation Electromagnetic clutch
GB2192677B (en) * 1986-07-14 1990-02-14 Sanden Corp Electromagnetic clutch
US4942856A (en) * 1988-09-10 1990-07-24 Robert Bosch Gmbh Ignition distributor for an internal combustion engine
GB2245822A (en) * 1990-06-25 1992-01-15 Wang Tsung Hsi A drinking vessel washing machine

Also Published As

Publication number Publication date
FR2361549A1 (en) 1978-03-10
BR7705340A (en) 1978-05-23
AU2709077A (en) 1979-01-25
DE2636651A1 (en) 1978-02-16
IT1084409B (en) 1985-05-25
FR2361549B3 (en) 1980-07-11
ES461575A1 (en) 1978-06-01
DE2636651C2 (en) 1984-09-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee