CN106968859B

CN106968859B - Solenoid coil assembly and solenoid valve

Info

Publication number: CN106968859B
Application number: CN201611175295.1A
Authority: CN
Inventors: F·伊尔格纳; B·克劳斯; C·基希纳; F·许默; H·施蒂尔; J·拜尔; T·绍博
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2015-12-18
Filing date: 2016-12-19
Publication date: 2020-12-11
Anticipated expiration: 2036-12-19
Also published as: DE102015226068A1; CN106968859A

Abstract

The invention relates to a solenoid coil assembly for an injection valve, in particular for a fuel injection valve of a motor vehicle, and to a solenoid valve having a coil wire, a winding body which extends in a longitudinal extension direction Z and which carries a part of the coil wire as a coil winding, and a connection region which carries an end section of the coil wire which is led out of the coil winding for external contacting, wherein in each case one connection element of the connection region is electrically conductively connected to in each case one of the end sections of the coil wire, and the connection region and/or the connection element extends at least partially in a direction X which is not parallel to and in particular perpendicular to the longitudinal extension direction Z of the winding body and to a side of the winding body facing away from the winding body.

Description

Solenoid coil assembly and solenoid valve

Technical Field

The present invention relates to a solenoid coil assembly and a solenoid valve. The invention relates in particular to a solenoid assembly for an injection valve, preferably for a fuel injection valve of a motor vehicle, and to an injection valve or a fuel injection valve of a motor vehicle using a solenoid assembly.

Background

In the case of an arrangement for an electromagnetic coil, in particular in the general construction of an injection valve and in the special construction of a fuel injection valve of a motor vehicle, the coil wire is usually attached to a winding package in order to form a coil winding. Here, the following difficulties often arise: the height of the structure and the arrangement of the connecting elements and their assembly are disadvantageous for the automation of the process during further processing and/or further use of the solenoid coil assembly, so that an optimized production rate cannot be achieved.

Disclosure of Invention

In contrast, the solenoid coil assembly according to the present invention has the following advantages: in the case of a particularly compact design of the solenoid coil arrangement, further processing of the solenoid coil arrangement, for example in the case of the assembly of solenoid valves and the like, can be configured particularly efficiently and automatically. The first aspect of the electromagnetic coil assembly according to the present invention is realized by: a solenoid valve assembly for an injection valve, in particular for a fuel injection valve of a motor vehicle, is provided, having a coil wire, a winding body which extends in a longitudinal extension direction Z and which carries the coil wire as part of a coil winding, and having a connection region which receives or carries an end section of the coil wire which is guided out of the coil winding for external contacting, wherein in each case one connection element of the connection region is electrically conductively connected to in each case one of the end sections of the coil wire, and the connection region and/or the connection element extends at least partially in a direction X which is not parallel and in particular perpendicular to the longitudinal extension direction Z of the winding body and to a side facing away from the winding body.

In particular, the structural length or the structural height of the electromagnetic coil assembly is reduced by the connecting regions and/or the connecting elements extending at least partially in a direction which is not parallel to and in particular perpendicular to the longitudinal extension direction Z of the winding body and to the side facing away from the winding body. Conventionally, in electromagnetic coil assemblies, the connection regions and in particular the connection elements are designed in parallel and thus in the extension of the winding package. In contrast, in the present invention, the bending of the profile results in a reduced length or height compared to conventional solenoid assemblies. This also facilitates the automation of the process in further processing.

The further processing can also consist in particular in that the solenoid coil assembly according to the invention is also injected or sprayed into an embedding material of the embedded housing type. On the other hand, solenoid assemblies are used, for example, in the construction of solenoid valves, for example fuel injection valves for motor vehicles. Since these further processing steps are generally to be automated and are to be carried out with a throughput of as high a number of pieces as possible, consideration is also given to aspects which only work when, for example, a high number of solenoid coil assemblies on which the bulk is based must be maintained. Here, the bulkiness (Sperrigkeit) of the individual solenoid coil assemblies is an important factor. This bulkiness is influenced on the one hand by the direction of maximum longitudinal extension of the electromagnetic coil assembly, i.e. the structural length or the structural height. However, specific geometries which are otherwise configured by connecting elements and connecting regions are also of interest.

According to a first aspect of the invention, an improvement is achieved by reducing the structural length or the structural height of the electromagnetic coil assembly according to the invention. The bulkiness and the risk of getting blocked in an automated process of the solenoid coil assembly according to the invention are thereby reduced.

Alternatively or additionally, the details of the geometry of the solenoid coil assembly according to the invention may be adapted to further eliminate bulkiness, for example to reduce the risk of the solenoid coil assembly touching each other in the bulk.

According to a second aspect of the invention, therefore: an electromagnetic coil assembly for an injection valve, in particular for a fuel injection valve of a motor vehicle, having a coil wire, a winding package which extends in a longitudinal direction of extension Z and which carries a part of the coil wire as a coil winding, and having a connection region which carries end sections of the coil wire which are led out of the coil winding and are intended for external contacting, wherein in each case one connection element of the connection region is electrically conductively connected to in each case one of the end sections of the coil wire, wherein the connection elements lie locally in a plane and run parallel to one another or enclose an acute angle in the local direction of extension X of the connection elements, wherein at least one of the connection elements has a projection on a side facing the other connection element, and wherein the projection extends at least partially perpendicularly to the direction of extension X of the connection element and onto the other connection element, and is spaced apart from the other connecting element.

According to a second aspect of the invention, a projection is formed on at least one of the connecting elements on the side facing the other connecting element. The projection extends at least partially perpendicularly to the direction of extension of the connecting element provided with the projection and in particular extends toward the other connecting element, while remaining spaced apart from the latter, in particular in order to avoid an electrical short circuit. By the projections provided according to the invention, the spacing between the connecting elements of the connecting regions is reduced and thereby the probability of adjacent solenoid coil assemblies contacting in the bulk being caught by their connecting regions and in particular by their connecting elements is reduced. In this manner, the productivity of the manufacturing process can be increased and the risk of snagging is reduced when automation is performed using a plurality of solenoid coil assemblies in a bulk manner.

The present invention meets the following needs: a solenoid coil assembly is proposed which ensures increased productivity during further processing and enables a more flexible use of the solenoid coil assembly or of the product derived therefrom.

The following shows a preferred embodiment of the invention.

The provision according to the invention of the connecting regions and/or the connecting elements in a direction which is not parallel to the longitudinal extension of the winding package and which faces away from the side of the winding package and the provision of a projection on at least one of the connecting elements can also be combined with one another, so that a magnetic coil assembly is provided which, in addition to the bent connecting regions or bent connecting elements, also shows a reduction in the distance between the connecting elements by the provision of at least one projection on at least one of the connecting elements.

The contact possibilities and the connection geometries of the electromagnetic coil assembly according to the invention can be configured particularly flexibly, wherein, for example, a first section of the connection region and/or the connection element facing the winding package extends in a direction X which is not parallel to and in particular perpendicular to the longitudinal extension direction Z of the winding package and to the side facing away from the winding package, and a second section of the connection region and/or the connection element connected to the first section and facing away from the winding package extends in a direction which is not parallel to and in particular perpendicular to the extension direction X of the first section, in particular runs counter to the longitudinal extension direction Z of the winding package.

In this regard, different connection geometries are provided for contacting the solenoid coil assembly according to the invention via the connection region and its connection elements. Shear contact may be considered, or pin contact may also be considered, such as Pogo-Pins (Pogo-Pins).

In a further preferred embodiment of the solenoid coil assembly according to the invention, the risk of hooking is further reduced during the further processing when a plurality of solenoid coil assemblies are provided as discrete parts, in that each of the connecting elements has a projection on the side facing the other connecting element, and the projections extend at least partially perpendicularly to the direction of extension X of the respective one of the connecting elements and extend respectively onto the respective other connecting element and are spaced apart from the latter.

In this case, it is particularly advantageous if the projections of the first and second connecting elements are opposite one another.

When the connection region is formed as part of the winding package, in particular as a flange or flange region of the winding package, a particularly compact design is achieved for the electromagnetic coil assembly.

The electromagnetic coil assembly according to the invention can be designed particularly securely in that the coil windings, the winding bodies and/or the connection regions are at least partially embedded by an embedding housing.

Advantageously, the embedded housing is designed as a cast housing and in particular as a die-cast housing.

A particularly high stability is achieved for the solenoid coil assembly if the embedded housing is designed as a cast housing, in particular as a die-cast housing. In this way, a particularly stable and compact construction of the electromagnetic coil assembly according to the invention can be achieved.

In a further development of the electromagnetic coil assembly according to the invention, the winding package has a circumferential surface, in particular an outer circumferential surface, on which the actual coil winding is received.

The circumferential surface and the region of the winding body having the circumferential surface of the winding body can be supplemented by a flange region or a flange of the winding body, to which the connection region of the electromagnetic coil assembly according to the invention can be connected or which has or forms the connection region.

The coil winding is formed in particular from a continuous and/or central section of the coil wire.

In contrast, the first and second end sections of the coil wire serve to electrically connect the coil winding of the electromagnetic coil assembly to a respective current or voltage supply.

The coil winding and the winding package are preferably substantially rotationally symmetrical with respect to a common axis of symmetry Z. This axis may preferably be directed parallel to the spatial direction z.

Furthermore, according to a further aspect, the invention also relates to a solenoid valve and in particular an injection valve or a fuel injection valve of a motor vehicle using the solenoid assembly according to the invention. In this respect, the solenoid valve according to the invention has a valve element which can be magnetically actuated in order to change the state of the solenoid valve between an open state and a closed state. The solenoid coil assembly according to the invention is configured for operating the valve element.

Drawings

Embodiments of the present invention are described in detail with reference to the accompanying drawings.

Fig. 1 and 2 are schematic side cross-sectional views of two embodiments of a solenoid coil assembly according to the present invention.

Fig. 3 and 4 show an embodiment of a solenoid assembly according to the invention in perspective side view, as compared to an embodiment of a conventional solenoid assembly from which the inventors began in developing the invention.

FIG. 5 illustrates a top perspective view of another embodiment of a solenoid coil assembly according to the present invention.

Fig. 6 to 9 show different embodiments of the electromagnetic coil assembly according to the invention in schematic side views, with focus on different geometries of the connection region and the connection element.

Fig. 10 and 11 show in schematic top views the connection regions of embodiments of the electromagnetic coil assembly according to the invention with different geometries of the connection elements and their projections.

FIGS. 12 and 13 are schematic views of an embodiment of a solenoid valve according to the present invention with an embodiment of a solenoid coil assembly according to the present invention in use.

Detailed Description

Embodiments of the present invention will be described in detail with reference to fig. 1 to 3 and 5 to 13. Identical and equivalent and identically or equivalently functioning elements and components are designated by the same reference numerals. A detailed description of the identified elements and components will not be repeated in each instance that such elements and components are present.

The features shown and other characteristics may be separated from each other and combined with each other in any form without leaving the core of the invention.

Fig. 1 shows a schematic side sectional view of a first embodiment of a solenoid coil assembly 10 according to the present invention.

The electromagnetic coil assembly 10 of fig. 1 has a winding package 30, which may also be referred to as a coil package. The winding package consists of a real winding region 36, which carries the coil winding 20 in the form of a section of the coil wire 24 on its outer circumferential surface 31. This section of the coil wire 24 is, for example, substantially the central section 23 of the coil wire 24. The coil wire is bounded by a first end section 21 and a second end section 22, which serve as a first connection end and a second connection end for the supply and removal of current or voltage, with a central section 23 between them.

The winding region 36 of the winding package 30 with the coil winding 20 received there is embedded in an embedded housing 40, which can be designed as a cast housing or a diecast housing and has an outer surface 41. The embedded housing 40 and the winding package 30 here have a generally cylindrical shape with a common axis of symmetry Z.

In order to stabilize the coil winding 20 on the winding package 30 during operation and during the production method, two measures can be provided in the embodiment of the electromagnetic coil assembly 10 according to fig. 1, namely (i) bending the connecting region 60 and the connecting

elements

61, 62 and (ii) forming one or

more projections

63, 64 between the connecting

elements

61, 62.

Fig. 1 and 2 show exemplary embodiments of an electromagnetic coil assembly 10 according to the invention, in which the respective connection region 60 is formed with a base section 70 in the direction of extension Z of the winding package 30 and with a first section 71 which is perpendicular to the direction of extension Z and is bent perpendicular to the base section in the direction opposite to the x direction. Correspondingly, the first and second receiving

elements

61 and 62 of the connecting region 60, which are electrically connected to the first and

second end sections

21 and 22 as first and second connecting ends of the coil wire 24, also run in a bent manner.

In the embodiment of fig. 1, only the winding package 30 and the coil winding 20 are embedded in the embedded housing 40 with the outer side 41, while the actual connecting region 60 is formed here by the first and second connecting

elements

61 and 62.

In contrast, in the embodiment of fig. 2, the coil arrangement 10 according to the invention is provided with a protective portion for the first and second connecting

elements

61 and 62 in such a way that the embedded housing 40 extends into the connecting region 60 and/or forms a part thereof, i.e. in such a way that it embeds and forms the first and second connecting

elements

61 and 62 and, correspondingly, the base section 70 and the first section 71 of the connecting region 60.

Fig. 3 and 4 show an embodiment of a solenoid coil assembly 10 according to the invention in a perspective side view, as compared to an embodiment of a conventional solenoid coil assembly 10', which the inventors have started from when developing the subject matter according to the invention.

Shown is the structural height difference 50 of the winding packages 30 and 30 'and of the electromagnetic coil assemblies 10 and 10' as a whole in the longitudinal extension direction Z parallel to the Z direction.

This structural height difference 50 is obtained by the different configuration of the connecting region 60 according to the invention compared to a conventional connecting region 60'.

In the conventional connecting region 60 'of the conventional solenoid coil assembly 10', the first and second connecting elements 61 'and 62' simply extend along and parallel to the extension direction Z of the winding package 30 'of the conventional solenoid coil assembly 10' oriented in the Z direction.

In contrast, in the embodiment according to the invention of the magnet coil assembly 10 according to fig. 3, the connection region 60 comprises a short base section 70 in the direction of extent Z of the winding package 30 parallel to the Z direction, followed by a first section 71 for the connection region 60 and for the first and

second connection elements

61 and 62 running in a direction opposite to the x direction, followed by a second section 72 for the connection region 60 and for the first and

second connection elements

61 and 62 running perpendicular to the first section. In the second section 72, the connecting region 60 and the connecting

elements

61, 62 run counter to the z direction and thus return to the winding package 30.

In the embodiment of fig. 3, the embedded housing 40 has a first section 46, which embeds the winding region 36 of the winding package 30 together with the coil winding 20, which is formed from the central section 23 of the coil wire 24. In addition, a second section 45 of the embedded housing 40 is formed, which embeds or forms the flange 35 or the flange region of the winding package 30 and thus at least partially embeds or forms the connection region 60 and also at least partially embeds the first and

second connection elements

61 and 62.

Fig. 3 also shows that one of the first and second connecting

elements

61 and 62 is electrically connected to one of the first and

second end sections

21 and 22, between which the central section 23 of the coil wire 24 is formed.

Fig. 5 shows a perspective top view of another embodiment of a solenoid coil assembly 10 according to the present invention. Shown is an embedded housing 40, by means of which the winding package 30 and the coil winding 20 are embedded in the frame of a first section 46 of the embedded housing 40.

The connecting region 60 is at least partially embedded or formed by the second section 45 of the embedded housing 40, namely by the base section 70 and the first and

second sections

71 and 72. And one of the first and second connecting

elements

61 and 62 of the connecting region 60 is electrically connected with one of the first and

second end sections

21 and 22 of the coil wire 24 forming the coil winding 20.

In order to reduce the risk of hooking the solenoid coil assembly 10 according to the invention in the case of use as a bulk part having a plurality of solenoid coil assemblies 10, in the embodiment according to fig. 5 the first and second connecting

elements

61 and 62 have on their opposing inner sides 61-1 and 61-2 or inner edges first and

second projections

63 and 64 directed toward and opposing one another, by means of which projections the spacing between the first and second connecting

elements

61 and 62 is reduced, so that the connecting

elements

61, 62 of the adjacent solenoid coil assembly 10 according to the invention in the bulk part are prevented from passing through and hooking together.

Fig. 6 to 9 show in schematic side views different embodiments of the solenoid coil assembly 10 according to the invention with different configurations of the connection region 60 together with the first and

second connection elements

61 and 62 and the

sections

70, 71 and 72 of the connection region.

In the embodiment according to fig. 6, the connecting region 60 and the first and second connecting

elements

61 and 62 together have a short base region 70 in the Z direction, i.e. in the direction of extent Z of the winding package 30, and a first section 71 which is perpendicular to this base region and is bent away from the x direction, as a result of which the overall length or the overall height of the electromagnetic coil assembly 10 according to the invention is reduced in comparison to conventional assemblies having connecting regions 60' which run exactly in the Z direction.

In the embodiment according to fig. 7, in addition to the configuration according to fig. 6, the second region 72 connected to the first region 71 is opposite to the z direction, so that the second section 72 is formed for connecting the region 60 and the first and second connecting

elements

61 and 62 in the z direction toward the winding package 30.

The embodiment of fig. 8 and 9 corresponds to that of fig. 6 and 7, however, in the embodiment according to fig. 8 and 9, the base portion 70 in the z-direction is not formed. In this way, the overall length or the overall height of the solenoid assembly according to the invention can be further reduced.

Fig. 10 and 11 show a connection region 60 of an embodiment of the solenoid coil assembly 10 according to the invention with

connection elements

61 and 62 in a schematic top view.

In the embodiment according to fig. 10, the projection 63 is formed only on the inner side 61-1 of the first connecting element 61, which is opposite the second connecting element 62, in order to locally reduce the distance between the first and second connecting

elements

61 and 62 and thus reduce the probability of hooking in the loose parts by direct contact with the electromagnetic coil assembly 10.

In the embodiment according to fig. 11, the first connecting element 61 and the second connecting element 62 have first and

second projections

63 and 64 on opposite inner sides 61-1 and 62-1, respectively, which projections are directly opposite one another, as a result of which the local spacing between the first and second connecting

elements

61 and 62 is further reduced and therewith the probability of catching in direct contact with one another of the solenoid coil assemblies 10 according to the invention in the loose parts is also reduced.

Fig. 12 and 13 show the use of the solenoid coil assembly 10 according to the invention in a solenoid valve 100. By the operation of the solenoid coil assembly 10 according to the invention within the solenoid valve 100, the valve element 110 can be switched back and forth between a first or open state according to fig. 12 and a second or closed state according to fig. 13, wherein a valve stroke 115 is realized.

These and additional features and characteristics of the present invention will be further explained in light of the following description.

More particularly, the present invention relates to the configuration of solenoid coil assembly 10 for injection valve 100. The solenoid coil arrangement 10 according to the invention has a modified form insofar as, for example, it is shorter and is designed such that the current contact must still be usable for adjustment and detection or only slightly modified.

Furthermore, to avoid hooking, an anti-hooking design is used.

The bent connecting element, for example in the form of a pin, can provide a contact surface for the front contact and/or for the lateral contact.

In order to be able to use existing contacting techniques, so-called Assembly Flags (Assembly-Flags) can be used, for example according to a second bend or in a 90 ° bent manner, with an excess if necessary.

Claims

1. A solenoid assembly (10) for an injection valve, the solenoid assembly having: a coil wire (24), a winding body (30) which extends in a longitudinal extension direction (Z) and which carries a part of the coil wire (24) as a coil winding (20), and a connection region (60) which carries end sections (21, 22) of the coil wire (24) which are led out of the coil winding (20) for external contacting, wherein: one connecting element (61, 62) of the connecting region (60) is electrically conductively connected to one of the end sections (21, 22) of the coil wire (24), the connecting elements (61, 62) are located locally in a plane and run parallel to one another or enclose an acute angle in a local direction of extension (X) of the connecting elements, at least one of the connecting elements (61, 62) has a projection (63, 64) on a side facing the other connecting element (62, 61), and the projection (63, 64) extends at least partially perpendicular to the direction of extension (X) of the one connecting element (61, 62) and toward the other connecting element (62, 61) and is spaced apart from the other connecting element.

2. The electromagnetic coil assembly (10) according to claim 1, wherein the connection region (60) and/or the connection element (61, 62) extends at least partially in a direction (X) which is not parallel to a longitudinal extension direction (Z) of the winding body (30) and to a side facing away from the winding body (30).

3. The electromagnetic coil assembly (10) of claim 2, wherein: the connection region (60) and/or a first section (71) of the connection element (61, 62) facing the winding body (30) extends in a direction (X) which is not parallel to a longitudinal extension direction (Z) of the winding body (30) and to a side facing away from the winding body (30); the connecting region (60) and/or a second section (72) of the connecting element (61, 62) which is connected to the first section and faces away from the winding body (30) extends in a direction which is not parallel to the direction of extension (X) of the first section (71).

4. The electromagnetic coil assembly (10) according to any one of the preceding claims, wherein: each of the connecting elements (61, 62) has a projection (63, 64) on a side facing the respective other connecting element (62, 61), and the projection (63, 64) extends at least partially perpendicular to the direction of extension (X) of the respective one connecting element (61, 62) and onto the respective other connecting element (62, 61) and is spaced apart from the other connecting element.

5. The solenoid coil assembly (10) of claim 4 wherein said tabs (63, 64) of said connecting elements (61, 62) are opposed to each other.

6. Electromagnetic coil assembly (10) according to one of claims 1 to 3, wherein the connection region (60) is configured as part of the winding body (30).

7. The electromagnetic coil assembly (10) as claimed in one of claims 1 to 3, having a buried housing (40) in which the coil windings (20), the winding bodies (30) and/or the connection regions (60) are at least partially embedded.

8. The electromagnetic coil assembly (10) as set forth in claim 7, wherein said buried housing (40) is a cast housing.

9. The solenoid coil assembly (10) according to any one of claims 1 to 3, wherein the solenoid coil assembly (10) is configured for a fuel injection valve of a motor vehicle.

10. The electromagnetic coil assembly (10) according to claim 2, wherein the connection region (60) and/or the connection element (61, 62) extends at least partially in a direction (X) perpendicular to a longitudinal extension direction (Z) of the winding body (30).

11. The electromagnetic coil assembly (10) according to claim 3, wherein the first section (71) extends in a direction (X) perpendicular to a longitudinal extension direction (Z) of the winding body (30).

12. The electromagnetic coil assembly (10) as claimed in claim 3, wherein the second section (72) extends in a direction perpendicular to the direction of extension (X) of the first section (71).

13. The electromagnetic coil assembly (10) according to claim 3, wherein the second section (72) extends counter to a longitudinal extension direction (Z) of the winding body (30).

14. The solenoid coil assembly (10) of claim 6, wherein the connection region (60) is configured as a flange (35).

15. The electromagnetic coil assembly (10) as set forth in claim 8, wherein said buried housing (40) is a die cast housing.

16. A solenoid valve (100) having: a valve element (110) which is magnetically operable to change the state of the solenoid valve (100) between an open state and a closed state, and a solenoid assembly (10) according to any one of claims 1 to 15 for operating the valve element (110).

17. The solenoid valve (100) according to claim 16, wherein the solenoid valve (100) is configured as an injection valve of a motor vehicle.

18. The solenoid valve (100) according to claim 16, wherein the solenoid valve (100) is configured as a fuel injection valve of a motor vehicle.