EP2510221A1

EP2510221A1 - Starter device

Info

Publication number: EP2510221A1
Application number: EP10788268A
Authority: EP
Inventors: Patrick Hallas
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2009-12-11
Filing date: 2010-11-18
Publication date: 2012-10-17
Also published as: CN102639864B; CN102639864A; WO2011069800A1; DE102009054539A1

Abstract

The invention relates to a starter device (10) for an internal combustion engine having an electrical starter motor (13) having a starter relay (16) which serves to switch the starter motor (13), among other things, having an electrical connection line (201) between the starter relay (16) and the starter motor (13), wherein the electrical connection line (201) is fastened to a bolt (151) of the starter relay (16) and to said end a contact plate (203) of the electrical connection line (201) has a hole (209) through which the bolt (151) protrudes, wherein at least one form-fitting element (218) is arranged on the contact plate (203) which interacts with a relay cover (153) on the starter relay (16), thus preventing a rotation of the contact plate (203) around the bolt (151).

Description

Description title

Starting device prior art

For starters, terminal 45 on the relay is contacted with a standard cable lug (contact plate). This is attached to the contact pin on the relay and fixed by tightening a nut in its position, s. a. DE-19726726 AI.

The disadvantage here is that the cable lug (contact plate) by

the prestress in the strand between the cable lug and the connection at the

Turn the starter motor on the contact pin and lift it off again.

Disclosure of the invention

Due to the features of claim 1 mounting of the Kontakplatte is simplified. The contact plate can then normally no longer dissolve before it is finally fixed by means of a securing element. In addition, the contact plate can be positioned in the correct position, without first a further auxiliary element, such as. a mother to use. As a result, a secure concealed mounting, for example, allows under a hood.

Due to the design of the contact plate with a plurality of form-locking elements, the clamp-like embrace a projection of the relay cover, a simple solution can be realized inexpensively.

The arrangement is particularly advantageous if, in addition, a molded part made of insulating material is used, which holds a conductor track. This additional assembly, especially when the molding is designed as a hood, the assembly is longer and more complex, so that the risk of slipping of the contact plate is greater. Is the molding designed as a hood, which is Contact plate may no longer or only poorly visible during assembly, so that slipping of the contact plate possible, but not recognizable. A wrong assembly is almost impossible by the inventive solution.

Short descriptions of the drawings

The invention will be explained in greater detail below by way of example with reference to the figures, in which:

FIG. 1 shows a starting device in a longitudinal section,

FIG. 2 shows a partial spatial view of the starting device,

FIG. 3 is a perspective view of a contact plate;

4 and 5 each show a detailed view of the mounted contact plate,

FIG. 6 shows a three-dimensional view of the starting device with mounted molded part,

Figure 7 shows a longitudinal section through a bolt with mounted molding.

Embodiments of the invention

FIG. 1 shows a starting device in a longitudinal section. FIG. 1 shows a starting device 10. This starting device 10 has, for example, a starter motor 13 and a starting relay 16 (engagement relay). The starter motor 13 and the starting relay 16 are fixed to a common drive end plate 19. The starter motor 13 is functionally to drive a starter pinion 22 when it is in the ring gear 25 of the not shown here

Internal combustion engine is eingespurt.

The starter motor 13 has a housing as a pole tube 28 which at its

Inner circumference carries pole pieces 31, which are each wound by a field winding 34 (electrical excitation). The pole shoes 31 in turn surround an armature 37, which has an armature packet 43 constructed from fins 40 and an armature winding 49 arranged in grooves 46. The armature package 43 is pressed onto a drive shaft 44. At the starter pinion 22 end remote from the drive shaft 44, a commutator 52 is further attached, which is composed, inter alia, of individual commutator fins 55. The commutator bars 55 are electrically connected in a known manner with the armature winding 49, that when energized the commutator fins 55 by carbon brushes 58th a rotational movement of the armature 37 in the pole tube 28 results. A arranged between the starting relay 16 and the starter motor 13 power supply 61 supplies in the ON state, both the carbon brushes 58 and the field winding 34 with power. The drive shaft 44 is commutator side supported by a shaft journal 64 in a sliding bearing 67, which in turn in a

Commutator bearing cap 70 is held stationary. The commutator 70 is again by means of tie rods 73 which are arranged distributed over the circumference of the pole tube 28 (screws, for example, 2, 3 or 4 pieces) in

Drive end plate 19 attached. It relies while the pole tube 28 am

Drive end plate 19 from, and the Kommutatorlagerdeckel 70 on the pole tube 28th

In the drive direction, a so-called sun gear 80 connects to the armature 37, which is part of a planetary gear 83. The sun gear 80 is surrounded by a plurality of planet wheels 86, usually three planet wheels 86, which are supported by means of roller bearings 89 on journals 92. The planet gears 86 roll in a ring gear 95, which is mounted outside in the pole tube 28. Towards the output side, the planet wheels 86 are adjoined by a planetary carrier 98, in which the axle journals 92 are accommodated. The planet carrier 98 is in turn stored in an intermediate storage 101 and a slide bearing 104 arranged therein. The intermediate bearing 101 is designed cup-shaped, that in this both the planet carrier 98, and the planet wheels 86th

are included. Furthermore, the ring gear 95 is arranged in the cup-shaped intermediate bearing 101, which is ultimately closed by a cover 107 relative to the armature 37. Also, the intermediate bearing 101 is supported with its outer circumference on the inside of the pole tube 28. The armature 37 has on the end facing away from the commutator 52 end of the drive shaft 44 has a further shaft journal 110, which is also received in a sliding bearing 113, from. The sliding bearing 113 in turn is in a central bore of the

Planet carrier 98 recorded. The planetary carrier 98 is integrally connected to the output shaft 116. This output shaft 116 is connected to her from

Intermediate bearing 101 facing away from the end 119 in a further bearing 122 which is fixed in the drive bearing plate 19, supported. The output shaft 116 is divided into various sections. Thus, the section which is arranged in the sliding bearing 104 of the intermediate bearing 101, a portion with a so-called spur teeth 125 (internal teeth), which is part of a so-called shaft-hub connection. This shaft-hub connection 128 in this case allows the axially straight sliding of a driver 131. This driver 131st is a sleeve-like extension which is integral with a cup-shaped outer ring 132 of the freewheel 137. This freewheel 137 (Richtgesperre) further consists of the inner ring 140 which is disposed radially within the outer ring 132. Between the inner ring 140 and the outer ring 132 clamping body 138 are arranged. These clamp body 138 prevent in

Cooperation with the inner and outer ring relative rotation between the outer ring and the inner ring in a second direction. In other words, the freewheel 137 allows a relative movement between inner ring 140 and outer ring 132 in one direction only. In this

Embodiment, the inner ring 140 is formed integrally with the starter pinion 22 and the helical teeth 143 (external helical teeth).

For the sake of completeness, the single-track mechanism should be considered here. The starting relay 16 has a bolt 150, which is an electrical contact and which is connected to the positive terminal of an electric starter battery, which is not shown here. This bolt 150 is passed through a relay cover 153. This relay cover 153 includes

Relay housing 156 from, by means of several fasteners 159

(Screws) is attached to the drive end plate 19. In the starting relay 16, a pull-in winding 162 and a so-called holding winding 165 is further arranged. The pull-in winding 162 and the holding winding 165 each cause an electromagnetic field in the switched-on state, which flows through both the relay housing 156 (made of electromagnetically conductive material), a linearly movable armature 168 and an armature return 171. The armature 168 carries a push rod 174, which is moved in the direction of linear retraction of the armature 168 in the direction of a switching pin 177. With this movement of the push rod 174 to the switching pin 177 this is moved from its rest position in the direction of two contacts 180 and 181, so that attached to the contacts 180 and 181 end of the switching pin 177 contact bridge 184 connects both contacts 180 and 181 electrically. As a result, electrical power is conducted from the bolt 150 across the contact bridge 184 to the power supply 61 and thus to the carbon brushes 58. The starter motor 13 is energized.

The starter relay 16 and the armature 168 but also has the

Task to move with a tension member 187 a drive bearing plate 19 rotatably arranged lever. This lever 190, Usually designed as a fork lever, does not surround with two here

shown "tines" on its outer circumference two discs 193 and 194 to move a clamped between these driver ring 197 for freewheel 137 back against the resistance of the spring 200 and thereby einzura the starter pinion 22 in the ring gear 25.

However, the starter motor 13 may also be permanently magnetically excited. The shaft-hub connection 128 can also be embodied as a steep-thread toothing and the starting pinion 22 is straight-toothed.

In Figure 2, the power supply 61 and the connecting line 201 is shown in more detail. At a further pin 151 of the starter motor 13 is connected plus side. This is u. a. a contact plate 203 (cable lug). This contact plate 203 has a hole, not shown here, with which the

Contact plate 203 is pushed onto the pin 151. On a plate extension 206 of the contact plate 203, the power supply 61 by welding

(Weld joint) attached.

In Figure 3, the contact plate 203 is shown as a single part. The contact plate 203 has the hole 209. Both sides of an imaginary connecting line between the hole 209 and the plate extension 206 are angled

Sheet metal tabs 212 which are integrally connected to the contact plate 203.

In Figures 4 and 5 further views of the pushed onto the pin 151 contact plate are shown. As can be seen, the relay cover 153 has a wide projection 215 directed toward the starter motor 13. This projection 215 is encompassed on both sides by the sheet metal tabs 212, so that the contact plate 203 is positively secured to the relay cover 153. Preferably, the contact plate 203 is thereby on the projection 215th

clamped.

It is also possible to clamp a metal tab 212 in a joint, not shown, of the relay cover 153 (positive locking) and thereby prevent rotation of the contact plate 203 to the bolt 151.

It is therefore disclosed a starting device 10 for an internal combustion engine, with an electric starter motor 13, with a starting relay 16, the is used, inter alia, for switching the starter motor 13, with an electrical connection line 201 between the starting relay 16 and the starter motor 13, wherein the electrical connection line 201 to a pin 151 of the

Starter relay 16 is fixed and this has a contact plate 203 of the electrical connection line 201 has a hole 209 through which the pin 151 protrudes, wherein on the contact plate 203 at least one interlocking element 218 is arranged, with a projection 215 and the relay cover 153 at the start relay 16 interacts and thereby prevents rotation of the contact plate 203 about the pin 151.

As can be seen, for example, in FIGS. 4 and 5, several surround one another

Positive locking elements 218 in the form of sheet metal tabs 212 on both sides

clasp like a projection 215.

In FIG. 6, the starting device 10 is shown from the side of the commutator bearing cover 70. About the starting relay 16, a hood 221 is slipped over, so that the starting relay 16 is partially received in a cavity of the hood 221. This hood 221 serves to lead to the bolts 150 and 151 traces 224 and 227. These interconnects 224 and 227 can be seen around the bolts 150 and 151 in FIG. 6, where they emerge from an insulating material 230 of the molded part 220 hood 221. The hood 221 or the molding 220 serves to not directly contact the bolts 150 and 151, but to be able to connect from another side by means of the tracks 224 and 227. As connectors serve more bolts 233, which are arranged laterally between the starter relay 16 and starter motor 13 and are electrically conductively connected to a respective conductor track 224 and 227. Both bolts 233 are shown in FIG

Protective caps 236 covered.

FIG. 7 shows a longitudinal section through the bolt 151. The

Contact plate 203 is disposed between the relay cover 153 of the starting relay 16 and the conductor track 227, which is held by the insulating material 230 of the molding part 220. A securing element 239 in the form of a nut clamps the conductor track 227 and the contact plate 203 between itself and the relay cover 153. The same arrangement without the contact plate 203 is present in the bolt 150. The contact plate 203 is secured by a securing element 239 on the bolt 151. The conductor track 227 is held by a molded part 220 in the form of a hood 221 made of insulating material 230, wherein the hood 221 at least partially accommodates the starting relay 16 in a cavity.

The molding 220 does not necessarily have the shape of a hood 221. For the sole purpose of having only terminals (bolt 236) in a location other than the usual location (relay cover 153), an enclosure of the tracks 224 and 227 is sufficient by insulating 230. In addition to the mere isolation of the tracks 224 and 227, no further function and going beyond shape is required. In this case, then the

Contact plate 203 also not required, as this is then easily accessible.

Claims

claims

1. Starting device (10) for an internal combustion engine, with an electric

Starter motor (13), with a starting relay (16), which among other things serves to switch the starter motor (13), with an electrical connection line (201) between the starting relay (16) and the starter motor (13), wherein the electric

Connecting line (201) is fixed to a bolt (151) of the starting relay (16) and for this purpose a contact plate (203) of the electrical connection line (201) has a hole (209) through which the bolt (151) protrudes, characterized in that at least one positive locking element (218) is arranged on the contact plate (203) which interacts with a relay cover (153) on the starting relay (16) and thereby prevents the contact plate (203) from rotating about the pin (151).

2. Starting device according to claim 1, characterized in that a plurality

Form-locking elements (218) clamp-like engage around a projection (215) on both sides.

3. Starting device according to claim 2, characterized in that the contact plate (203) between the relay cover (153) of the starting relay (16) and a conductor track (227) is arranged, which is held by a molded part (220) made of insulating material (230) ,

4. Starting device according to claim 3, characterized in that the conductor track (227) by a molded part (220) in the form of a hood (221) made of insulating material (230) is held, wherein the hood (221) the starting relay (16) at least partially receives.

5. Starting device according to one of the preceding claims, characterized in that the contact plate (203) by a securing element (239) on the bolt (151) is attached.