GB2041452A - Starter for an internal combustion engine - Google Patents
Starter for an internal combustion engine Download PDFInfo
- Publication number
- GB2041452A GB2041452A GB8003893A GB8003893A GB2041452A GB 2041452 A GB2041452 A GB 2041452A GB 8003893 A GB8003893 A GB 8003893A GB 8003893 A GB8003893 A GB 8003893A GB 2041452 A GB2041452 A GB 2041452A
- Authority
- GB
- United Kingdom
- Prior art keywords
- driver
- starter
- disc
- engaging lever
- driver disc
- 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
Links
- 239000007858 starting material Substances 0.000 title claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 229920003023 plastic Polymers 0.000 claims abstract description 11
- 239000004033 plastic Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
- F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Valve Device For Special Equipments (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
Abstract
The starter has a screw shift drive (4 to 12) coupled to a solenoid-type switch (21) by means of a pivotally mounted, bifurcated engaging lever (29) which is formed in one piece from plastics material. Each of its resilient fork ends incorporates a circular hole (37) in which a cylindrical lug (15) of a plastics driver disc (11) is rotatably mounted. The driver disc (11) is provided, in the region of the lugs (15), with guide surfaces (18, 19) which overlap edge portions of a guide ring (8) and of a stop disc (9) between which, and by means of which, the driver disc (11) is movably arranged on a driver sleeve (6) of the screw shift drive. The engaging lever (29) and the driver disc (11) form an automatically preassemblable structural unit. <IMAGE>
Description
SPECIFICATION
Starter for an internal combustion engine
The invention relates to a starter for an internal combustion engine.
Starters for an internal combustion engine are known comprising a starter motor on the drive shaft of which is screwably arranged a driver sleeve of a screw shift drive, which driver sleeve is coupled to a starter pinion by means of an overrunning clutch, the starter also having a pivotally mounted bifurcated engaging lever which is actuable by means of a solenoid-type switch and by means of which the screw shift drive can be resiliently and yieldingly displaced on the drive shaft, the fork ends of the engaging lever movably acting upon a driver disc which is loosely mounted on the driver sleeve.
In starters of this kind both the engaging lever and the driver disc have been made from sheet metal. The engaging lever comprises two halves which are interconnected by spot welding. The fork ends of the engaging lever are rotatably secured by rivets to rectangular tabs formed on the driver disc. The central hole in the driver disc is in the form of a slotted hole in order to enable the driver disc to perform a pivoting movement relative to the cylindrical members carrying the driver disc. This arrangement of engaging lever and driver disc has the disadvantage that it is an expensive matter to manufacture the parts by punching and welding and to interconnect them by rivets. Furthermore, the sheet metal parts no longer satisfy the increasing requirements with respect to resistance to vibration and silent operation.
There is provided by the present invention a starter for an internal combustion engine, having a starter motor on the drive shaft of which is screwably arranged a driver sleeve of a screw shift drive, which driver sleeve is coupled to a starter pinion by means of an overrunning clutch, the starter also having a pivotally mounted bifurcated engaging lever which is actuable by means of a solenoid-type switch and by means of which the screw shift drive can be resiliently and yieldingly displaced on the drive shaft, the fork ends of the engaging lever movably acting upon a driver disc which is loosely mounted on the driver sleeve, wherein the engaging lever is constructed in one piece from plastics material and each of its fork ends is provided with a circular hole, which holes are engaged by cylindrical lugs on the driver disc which is also in the form of a plastics part and whose end faces are provided, in the region of the lugs, with guide surfaces which extend parallel to the longitudinal axis and which overlap edge portions of a guide ring and of a stop disc between which the driver disc is movably arranged and which are likewise movably mounted on the driver sleeve.
In contrast to the known starter, the starter
in accordance with the invention has the advantage that the one-piece engaging lever
manufactured from plastics material satisfies requirements with respect to resistance to vibration, is pivotable and movable silently, and is suitable for automatic manufacture and assembly in the same manner as the plastics driver disc with which it forms a structural unit, which can be readily and automatically preassembled. The guide surfaces formed on the driver disc enable the driver disc to deviate from the longitudinal movement of the meshing drive during the pivoting movement of the engaging lever.
The inexpensive construction of the central bore in the driver disc in the form of a cylindrical hole is particularly advantageous.
Further advantages are that the resilient construction of the fork ends of the engaging lever facilitates automatic assembly and ensure a reliable, although releasable, connection between the engaging lever and the driver disc, and that the sloping portions of the fork ends facilitate mounting of the driver disc on the engaging lever.
An embodiment of the invention is illustrated in the drawings, in which: Figure 1 is a fragmentary longitudinal section through the starter of the embodiment,
Figure 2 is a fragmentary section taken on the line ll-ll of Fig. 1, and
Figure 3 is a fragmentary section taken on the line Ill-Ill of Fig. 1.
The starter has a motor 1 having a housing 2 and a drive shaft 3. A screw shift drive is movably disposed on the drive shaft 3. The screw shift drive comprises a starting pinion 4 which is coupled to a driver sleeve 6 by way of a roller-type overrunning clutch 5. The driver sleeve 6 is mounted on a coarse screwthreaded portion 7 of the drive shaft 3. A guide ring 8 of approximately Z-shaped cross section, and a stop disc 9, are movably mounted on the driver sleeve 6. The stop disc 9 abuts against a spring ring 10 which is mounted on the drive sleeve 6 in the vicinity of the adjacent end thereof. A driver disc 11 is movably disposed between the guide ring 8 and the stop disc 9.A meshing spring 1 2 is also mounted on the driver sleeve 6 and, when in the normal position shown in Fig. 1, urges the guide ring 8 against the stop disc 9 without impairing the movability of the driver disc 11. For this purpose, the guide ring t is provided with a guide portion 1 3 which is movably arranged on the driver sleeve 6, which is somewhat longer than the axial thick ness-ithe driver disc 11 and which is urged against the stop disc 9 by means of the engaging spring 1 2.
The driver disc 11 is made from a plastics material (a thermosetting plastics material in the present instance) which satisfies the ther mal requirements. The driver disc 11 has a cylindrical central hole 14 whose diameter is larger, by an amount which will be described further below, than the external diameter of the guide portion 13 3 which extends through the central hole 14. Two cylindrical lugs 1 5 are formed on the sides of the driver disc 11.
The diameters of the lugs 1 5 are larger than the axial thickness of the driver disc 11. The lugs 1 5 thus form, at the edge of the driver disc 11, guide surfaces 1 8 and 1 9 which extend beyond the end faces 16 and 1 7 of the driver disc and parallel to the longitudinal axis of the central hole 14. The guide surfaces 1 8 thereby overlap a rim 20 of the guide ring 8 which is likewise formed parallel to the guide portion 1 3. The guide surfaces 1 9 extend beyond the rim of the stop disc 9.
A solenoid-operated relay 21 is mounted laterally on the housing 2 of the motor 1. A drive bearing 22 is secured to the end face of the housing 2 and of the solenoid-operated switch 21 by means of draw rods 23. A sealing member 24 is interposed between the housing 2, the solenoid-operated relay 21, and the drive bearing 22. The sealing member 24 is guided in lateral recesses 25 in the drive bearing 22 and abuts against a plastics support member 26 which is likewise arranged between recesses 25. The support member 26 has two parallel limbs 27 providing two aligned bores 28. An engaging lever 29 is guided between limbs 27 and is pivotally mounted on a pin 30 fitted in the bores 28.
The engaging lever 29 is in the form of a bifurcated one-piece member injectionmoulded from plastics material. Its end 31 extends into a slot 32 in a connection end 33 of an armature 34 of the solenoid-type relay 21. The fork ends 35 of the engaging 29 are rendered resilient relative to one another by
means of a slot 36. A circular hole 37 is
incorporated in the vicinity of the end of each fork end. The fork ends 35 engage laterally around the driver disc 11. The cylindrical lugs 1 5 of the driver disc are rotatably mounted in the holes 37 in the fork ends 35. A sloping portion 38 is formed on each fork end 35 to act as a further assembly aid in addition to the slot 36. The width of the sloping portions is equal to the diameter of the holes 37. Each sloping portion 38 commences at the inside
39 of the fork ends 35 approximately on a
level with the centre of the holes 37 and taper off at the edges of the fork ends 35 in the vicinity of the outsides 40 thereof.
When the engaging lever 29 is pivoted, the
driver disc 11 is also moved at right angles to the meshing movement of the driver sleeve 6
and of the guide ring 8. The central hole 14
in the driver disc 11 is sufficiently large to
permit the required deflection of the driver
disc 11 at right angles to the longitudinal axis
of the guide ring 8. The guide surfaces 1 8 on the driver disc 11 prevent radial movements of the driver disc 11 relative to the guide ring 8 other than in the direction, at right angles to the lugs 1 5 of the driver disc 11, effected by the pivoting movement of the engaging lever 29.
Claims (5)
1. A starter for an internal combustion engine, having a starter motor on the drive shaft of which is screwably arranged a driver sleeve of a screw shift drive, which driver sleeve is coupled to a starter pinion by means of an overrunning clutch, the starter also having a pivotally mounted bifurcated engaging lever which is actuable by means of a solenoid-type switch and by means of which the screw shift drive can be resiliently and yieldingly displaced on the drive shaft, the fork ends of the engaging lever movably acting upon a driver disc which is loosely mounted on the driver sleeve, wherein the engaging lever is constructed in one piece from plastics material and each of its fork ends is provided with a circular hole, which holes are engaged by cylindrical lugs on the driver disc which is also in the form of a plastics part and whose end faces are provided, in the region of the lugs, with guide surfaces which extend parallel to the longitudinal axis and which overlap edge portions of a guide ring and of a stop disc between which the driver disc is movably arranged and which are likewise movably mounted on the driver sleeve.
2. A starter as claimed in claim 1, wherein the driver disc is provided with a coaxial central bore whose diameter is adapted to the divergence of the pivoting movement of the driver disc, effected by the engaging lever, from the longitudinal movement of the guide ring.
3. A starter as claimed in claim 1 or 2, wherein the root of the fork ends of the engaging lever is provided with a slot.
4. A starter as claimed in any of the claims 1 to 3, wherein each fork end of the engaging lever is provided with a sloping portion which commences from the inside of the fork end substantially on a level with the
longitudinal axis of the hole and tapers off at the free fork end in the vicinity of the outside thereof.
5. A starter for an internal combustion engine, substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792904530 DE2904530A1 (en) | 1979-02-07 | 1979-02-07 | TURNING DEVICE FOR INTERNAL COMBUSTION ENGINES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2041452A true GB2041452A (en) | 1980-09-10 |
| GB2041452B GB2041452B (en) | 1983-04-13 |
Family
ID=6062332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8003893A Expired GB2041452B (en) | 1979-02-07 | 1980-02-06 | Starter for an internal combustion engine |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS55107067A (en) |
| DE (1) | DE2904530A1 (en) |
| ES (1) | ES488299A0 (en) |
| FR (1) | FR2448643B1 (en) |
| GB (1) | GB2041452B (en) |
| IT (1) | IT1140532B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5848551A (en) * | 1996-02-29 | 1998-12-15 | Denso Corporation | Starter having improved pinion driving mechanism |
| EP3473845B1 (en) * | 2017-10-20 | 2022-05-04 | Mahle International GmbH | Starter for an internal combustion engine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4552924B2 (en) * | 2006-11-02 | 2010-09-29 | 株式会社デンソー | Starter |
| KR101390623B1 (en) | 2010-11-16 | 2014-04-29 | 미쓰비시덴키 가부시키가이샤 | Starter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1328587A (en) * | 1962-05-25 | 1963-05-31 | Bosch Gmbh Robert | Starting mechanism for an internal combustion engine starter and a starter equipped with said mechanism |
| FR1535883A (en) * | 1967-08-18 | 1968-08-09 | Lucas Industries Ltd | Starting device for internal combustion engine |
| GB1269511A (en) * | 1968-10-04 | 1972-04-06 | Lucas Industries Ltd | Electric starter motors |
| FR2045224A5 (en) * | 1969-06-24 | 1971-02-26 | Ducellier & Cie | |
| FR2167209A5 (en) * | 1972-01-10 | 1973-08-24 | Ducellier & Cie | |
| FR2192609A5 (en) * | 1972-07-13 | 1974-02-08 | Espanol Magneto Fab | |
| DE2822165A1 (en) * | 1978-05-20 | 1979-11-22 | Bosch Gmbh Robert | Starter motor drive actuator for IC engine - has plastics engagement lever pinned to solenoid armature for engaging motor pinion |
-
1979
- 1979-02-07 DE DE19792904530 patent/DE2904530A1/en active Granted
-
1980
- 1980-02-06 GB GB8003893A patent/GB2041452B/en not_active Expired
- 1980-02-06 ES ES488299A patent/ES488299A0/en active Granted
- 1980-02-06 IT IT19734/80A patent/IT1140532B/en active
- 1980-02-07 FR FR8002727A patent/FR2448643B1/en not_active Expired
- 1980-02-07 JP JP1308880A patent/JPS55107067A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5848551A (en) * | 1996-02-29 | 1998-12-15 | Denso Corporation | Starter having improved pinion driving mechanism |
| EP3473845B1 (en) * | 2017-10-20 | 2022-05-04 | Mahle International GmbH | Starter for an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2041452B (en) | 1983-04-13 |
| FR2448643B1 (en) | 1985-06-21 |
| ES8106355A1 (en) | 1980-08-01 |
| IT8019734A0 (en) | 1980-02-06 |
| JPS6256350B2 (en) | 1987-11-25 |
| IT1140532B (en) | 1986-10-01 |
| ES488299A0 (en) | 1980-08-01 |
| FR2448643A1 (en) | 1980-09-05 |
| DE2904530C2 (en) | 1990-04-19 |
| DE2904530A1 (en) | 1980-08-21 |
| JPS55107067A (en) | 1980-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19990206 |