JPH0551078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fuel conveying device comprising: an electric motor having a stator unit; a pump member driven by the electric motor;
It has a common casing surrounding the electric motor and the pump part, through which the medium to be conveyed flows, which casing has a stopper shoulder in its interior, which stopper shoulder. This relates to a type in which a stator unit is supported in the axial direction on the shoulder portion via a spacer.

Such devices are already known in the form in which the components for controlling a commutatorless motor are arranged in a dry chamber which is additionally assembled into the device.
This device is therefore disadvantageously large. Furthermore, since each component is not cooled, the required lifetime of this component cannot be guaranteed.

Advantages of the Invention In contrast, the fuel conveying device of the present invention having the features set forth in claim 1 has the following advantages. The components for controlling the electric motor are thus cooled because they are arranged in the housing of the device through which fuel flows. The cooling effect of the conveyed medium thus not only increases the service life, but also results in a significantly more compact construction of the device.

Advantageous embodiments of the invention having the features described in claim 1 are obtained by the measures set forth in claim 2 and below.

Embodiment FIG. 1 shows a fuel storage tank 1 connected via a suction line 12 to the suction side of a fuel conveying device 14.
0 is shown. A discharge line 16 leading to the internal combustion engine 18 is connected to the discharge side of the fuel conveying device 14 . During operation of the internal combustion engine 18, the fuel transfer device 14 transfers fuel from the fuel storage tank 10 to the internal combustion engine 1.
8.

As shown in FIG. 2, this fuel delivery device 14 has a pump member 15 and an electric motor 17, which are arranged in a common casing 20. This casing 20 has a suction port 22 and a discharge port 24. This discharge port 24 is provided with a check valve 26 . The electric motor 17 has a stator unit 28 and an armature 30. This armature 30 is rotatably supported within the casing 20 on an armature shaft 32. For this purpose, the armature shaft 32 is supported on the wall 34 of the pump element 15. The armature shaft 32 flows through this wall 34,
Moreover, one end thereof projects into a notch of a conveying member 36 belonging to the pump member 15 . The other end of this armature shaft 32 is similarly connected to the casing 2.
Boss 3 belonging to spacer 40 placed within 0
8 has been accepted. This spacer 40 has a tubular shape, and has an annular surface 42 on one end surface thereof.
(see FIG. 2) is supported by a stopper shoulder 44 of the casing 20. The other end-side annular surface 46 (see FIG. 4) of the spacer 40 is in contact with the stator unit 28 of the electric motor 17 (see FIG. 2). The spacer 40 has a stay 48 extending toward the center when viewed in the radial direction (see FIG. 3). This stay 48 supports the centrally located boss 38. An opening 50 is provided between each stay 48.
is left behind. Through this opening, the pump member 1
The medium conveyed from 7 can flow and reach the discharge port 24 . On the side remote from the armature shaft 32, this spacer 40 has a cutout 52.
This recess 52 serves to receive an electrical control element 54 with components for controlling the electric motor 17 . This electrical control member 54
has a plate-shaped support member 56 which is inserted into the cutout 52. The support member may be fixed within this notch 52 by engagement, adhesive, or the like. This plate-shaped support member 56 has a conductor plate 58, and this conductor plate 5
8 is provided with electrical components for controlling the motor. The conductor plate 58 is covered by a hood 60 in order to protect this component against the media to be transported. The connection between the plate-shaped support member 56 and the hood 60 is completely liquid-tight with respect to the medium. This is also achieved by the fact that the electrical control element 54 is located in an interior space 61 of the housing 20 which is under conveying pressure.
As particularly shown in FIG. 2, this plate-shaped support member 56 is pierced by a number of contact pins 62 and 63. In order to make this penetration particularly tight, this penetration pin is inserted into the glass guide member 64.
located within. A coil 66 located within the stator unit 28 is connected to the contact pin 63. Contact pins 62 serve to connect a working current circuit, which is not shown.

Advantageous guidance of the contact pin through the casing 20 of the fuel conveying device 14 is provided by the hood 60 of the support member 56.
This is provided by a tube 68 arranged on the opposite side and tightly connected to the support member 56. This tube 68 surrounds the contact pin 62 . This tube 68 has a length that extends through the casing 20 and is open on the side opposite the support member 56. Casing penetration part 70
A sealing element 72 is provided at , which prevents leakage of the casing 20 in this area.

Therefore, as shown in FIG.
2 is accessible without difficulty. The structure of the fuel conveying device 14 described above is extremely advantageous.

First, the spacer 40 is provided with an electrical control member 54 . Control element 54 is then already equipped with all contact pins 62 and 63 as well as tube 68. Then, the stator unit 28 together with the spacer 40 is also inserted into the casing 20. At this time, the end-side annular surface 42 of the spacer 40 is brought into contact with the stopper shoulder 40 of the casing 20. Pump member 1 to which stator unit 28 is fixed in the axial direction
After the installation of 5, the casing 20 is attached to the edge bend 7
It is closed by placing 4.

This electric motor 17 is a so-called non-commutator electric motor operated by the electronic control device described above. This particular arrangement in the medium stream to be conveyed, that is, in the illustrated embodiment, the fuel stream, makes it possible to achieve a very effective cooling of the electrical control element 54.

[Brief explanation of the drawing]

Fig. 1 is a schematic layout diagram of a fuel storage tank, a fuel transfer device, and an internal combustion engine; Fig. 2 is a vertical sectional view of the fuel transfer device shown in Fig. 1; and Fig. 3 is an inside view of this fuel transfer device. FIG. 4 is a sectional view of this spacer taken along the line - in FIG. 3. DESCRIPTION OF SYMBOLS 10...Fuel storage tank, 12...Suction conduit, 14...Fuel conveyance device, 15...Pump member, 16...Discharge conduit, 17...Electric motor, 18...
...Internal combustion engine, 20...Casing, 22...Suction port, 24...Discharge port, 26...Check valve, 28...
...Stator unit, 30... Armature, 32...
Armature shaft, 34...Wall portion, 36...Transportation member, 3
8... Boss, 40... Spacer, 42... End side annular surface, 44... Stopper shoulder, 46... End side annular surface, 48... Stay, 50... Opening, 52...
...notch, 54 control member, 56... support member, 5
8... Conductor plate, 60... Hood, 61... Inner room,
62, 63... Contact pin, 64... Glass guide member, 66... Coil, 68... Tube, 70... Casing penetration part, 72... Seal member, 74...
Edge bend.

Claims (1)

[Claims] 1. A fuel conveyance device, which includes an electric motor having a stator unit, a pump member driven by the electric motor,
It has a common casing surrounding the electric motor and the pump part, through which the medium to be conveyed flows, which casing has a stopper shoulder in its interior, which stopper shoulder. In the type in which the stator unit is supported in the axial direction on the shoulder via a spacer, a support member 56 is fixed to the spacer 40, and this support member 56 is required to control the electric motor 17. 1. A fuel conveying device, comprising: a component. 2. Claim 1, wherein the spacer 40 is made of synthetic resin and has a notch 52, into which the support member 56 is inserted without any play. The fuel conveyance device described. 3. The support member 56 is configured as a plate, and components necessary for controlling the electric motor 17 are fixed to the support member via a conductor plate 58. The fuel conveyance device described in Section 1. 4. The fuel conveyance device according to claim 3, wherein the conductor plate 58 fixed to the support member 56 is covered by a hood 60 immovably connected to the support member 56. 5. A fuel conveying device according to claim 4, wherein the connection between the support member 56 and the hood 60 is tight with respect to the medium to be conveyed. 6. The fuel conveying device according to claim 5, wherein the support member 56 is penetrated by contact pins 62, 63 coupled to the conductive plate 58. 7. A fuel conveying device according to claim 6, wherein the contact pins 62, 63 at least partially pass through an area of the support member 56 made of glass, ceramic or the like. 8. The contact pin 62 extends in a tube 68 passing through the casing 20, which tube 68 is connected on the one hand to the side of the support element 56 remote from the conductor plate 58 and on the other end. 8. The fuel conveying device according to claim 6 or 7, wherein the portion is open. 9. The fuel conveying device according to claim 8, wherein the outside of the tube 68 is connected to a sealing member 72 on the side remote from the casing 20. 10 The spacer 40 is formed into a tubular shape, and a stay 48 extending toward the center when viewed in the radial direction is disposed in the spacer, and the stay has a boss 38, which is connected to the motor 1.
10. The fuel conveying device according to claim 1, further comprising a bearing for the end of the armature shaft 32 belonging to the armature shaft 32.