EP3077624A1

EP3077624A1 - Electric machine having a first and a second housing part

Info

Publication number: EP3077624A1
Application number: EP14806611.1A
Authority: EP
Inventors: Samir Mahfoudh
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2013-12-04
Filing date: 2014-12-02
Publication date: 2016-10-12
Anticipated expiration: 2034-12-02
Also published as: DE102013224912A1; WO2015082462A1; EP3077624B1

Abstract

An electric machine (1), in particular a pump, comprises a first housing part (10) and a second housing part (11). At least one clamp (20), in particular two, three or four clamps (20) are distributed along the periphery of the electric machine (1). The first and second housing parts (10, 11) each have a substantially peripheral holding section (14, 15) by means of which at least one clamp (20) secures the first and second housing parts (10, 11) to one another.

Description

Description title

Electric machine with a first and a second housing part of the prior art

The invention relates to an electrical machine with a first and a second housing part, wherein at least one clip is arranged distributed over the circumference of the electric machine, according to the type of independent claims.

It is already an electric machine with a first and a second housing part known. Usually, the housing parts are screwed together. The position of the screw connections on the housing parts restricts the relative rotation of the housing parts relative to one another.

Furthermore, it is known to clasp the housing parts together via a clip connection. The document DE 20 2004 013 907 U1 shows a pump consisting of a motor and a pump head. The pump head and the motor are connected by several clip connections. Each clip connection is made by the cooperation of a latching clip, which is attached via a Klipsflansch to the motor and a detent, which is located on the pump head. The locking bracket and the detents are distributed around the pump.

Disclosure of the invention

The electric machine according to the invention is characterized in that the first and the second housing part each one substantially

have circumferential holding area and that at least one clip over the holding areas, the first and the second housing part, the first and the second housing part fastened together. The electric machine according to the invention has the advantage that a simple assembly of the housing parts to each other is possible. Next, the rotation of the housing parts to each other is possible. It is every angular position between the first and the second

Housing part possible. It eliminates threads or screw holes. Even complicated shapes, such as detents or locking clips on the housing parts are not required. The mounting of the brackets is limited

For example, on the attachment of the clip to the holding areas of the two housing parts.

The measures listed in the dependent claims, advantageous refinements and improvements of the main claim features.

It is to be regarded as particularly advantageous that at least one holding area has at least one holding element, for example a receiving recess. At least one clip interacts with the retaining element. The clip engages, for example, in the receiving recess. The holding element in the holding area allows a simplified mounting of the clamp to

Connection of the first and the second housing part. The holding element provides the clamp with a defined area in which the clamp acts in the holding area on the respective housing part. Further, it prevents falling off or

Slipping of the clip and thus a release of the connection between the first and the second housing part. An independent release of the clip from the holding area is prevented by the retaining element.

In a further embodiment, the retaining element may be formed as a receiving recess, in particular as a groove. The clip engages in the receiving recess. With the help of the receiving recess, which is formed for example as a groove, can be determined exactly at which point the force of the clip acts on the housing part. The housing can thus be adapted to the force. The holding element may be formed as a radial projection. A radial projection prevents the clip from slipping off the housing part in the assembled state. Further, the radial projection defines an area in which the clip acts on the holding area of the housing part.

It may be appropriate that at least one retaining element is in

Essentially over an entire holding area, in particular the entire

Length of a holding area extends. The extension of the holding element is carried out over 75% to 100%, in particular 85% to 100% of the holding area, or of the housing part. Thus, an attachment of the brackets on any part of the holding portion is possible. The surrounding with the housing holding element in the holding area allows additional simplification of the assembly. The first and the second housing part are in the circumferential direction substantially in each angular position to each other twisted mounted, in particular so that it can be mounted rotated by 360 degrees to each other. Here, a continuous rotation is possible, which means the rotation is not only step by step.

Next is to be regarded as advantageous that at least one holding portion, the first and / or second housing part is formed as a substantially circumferential flange. For example, a flange can be retrofitted to housing parts. As a result, the invention can be subsequently applied to electrical machines. It is thus conceivable electrical

Prior art machines are very simple to extend the invention.

According to an advantageous embodiment of the invention it is provided that at least one flange and a housing part are integrally formed.

For example, the first housing part comprises a flange. The flange is formed integrally with the housing part. But it is also conceivable that the second housing part comprises a flange and the flange and the housing part are integrally connected to each other. It is also possible that both housing parts comprise a flange which is in particular integrally connected to the housing parts. A one-piece design of the housing part and the

Flange simplifies the manufacture of the electrical machine, since no subsequent attachment of a flange to one or both housing parts is necessary. The flange can for example be cast directly with the housing part in one operation. A particular embodiment is achieved in that at least one clip has at least one free end portion and the at least one free end portion comprises an engagement element. The engagement element interacts with at least one retaining element. A best possible hold on the holding elements can be achieved by the design of engagement elements at the end portions. The engagement elements of the brackets are adapted, for example, to the shape of the holding elements in order to achieve the best possible interaction. Furthermore, the assembly of the clamps on the holding elements can be optimized by the engagement elements. The end portions with the engagement elements are designed so that they have no sharp edges, whereby damage to the holding member or one of the housing parts is avoided during assembly. The engagement elements are designed, for example, as curves. The rounding is a bend. Also, the clamps are easier to remove from the electrical machine by the engagement elements. This is advantageous in a repair of the electrical machine.

A further advantage is that at least one clip is formed as a spring clip, in particular made of metal, preferably made of steel. The

Training the clip as a spring clip allows by the spring force squeezing the housing parts. Thus, for example, distances between the housing parts can be prevented. Distances between the housing parts, for example, lead to increased wear in vibration. The formation of the metal clamp further enables electrical contacting of the two housing parts. By the brackets is the

Potential equalization between the housing parts of the electrical machine, possible. Further work steps such as attaching a cable, via which a potential equalization takes place, eliminated.

It is preferably provided that at least one clip has a C-shaped basic shape. The C-shaped basic shape has two free end sections. The free end sections engage, in particular engage behind the holding areas of the housing parts expediently by expanding the C-shape To achieve bias of the clamp, which ensures a secure abutment of the housing parts.

In a preferred embodiment, a connecting element, in particular a seal, preferably a wet seal is arranged between the first and the second housing part. By the arrangement of a

Connecting element between the first and the second housing part can be made a defined distance. Furthermore, it may be advantageous to introduce a component with a material deviating from the housing parts between the first and the second housing part. This may be advantageous in particular when the material of the first housing part reacts with the material of the second housing part, in particular reacting chemically.

A preferred development is that the connecting element holds the first and the second housing part together. For example, the connecting element can receive additional forces which abut against the latter in a less preferred direction of the clamp or the holding region. The

Connecting element provides the connection between the first and the second housing part, for example by gluing or increased surface friction. Here, the connecting element is designed as an adhesive layer or element with an increased surface friction. However, the connector may also produce a welded, brazed, hot-caulked, pierced or vulcanized connection between the first housing part and the second housing part. Also a non-positive or positive

Connection, in particular by re-hooking, which press into the material of the housing parts, or vice versa lead to a support of the bracket and the retaining element in the cohesion of the two housing parts.

Next is to be regarded as advantageous that the connecting element is a seal, in particular a wet seal. The material of the wet seal is applied in the liquid state to the point where the seal should later be. Subsequently, the wet seal hardens. Once the wet seal has cured, it can be used as a standard seal. Due to the use of a wet seal, due to its fluid mounting condition, Even with complex surfaces a seal with for the surface

best possible sealing effect are produced. Next allows one

Wet seal is a manufacture of a seal specifically for the

Scope of application. The seal can thus also be used in very complex and winding areas.

Furthermore, the wet seal may be additionally adhesive. By connecting the housing parts via the seal, the sealing effect is improved. The wet seal in addition to the sealing function also has a connection or holding function. By using a wet seal the effort for assembly is reduced.

An advantageous development is that between the first and the second housing part, a connecting element is arranged, wherein the

Connecting element is part of a pole pot. The pole pot separates the interior of the first housing part from the interior of the second housing part. Thus, the pole pot prevents the exchange of liquids and gases between the interior of the first and the interior of the second housing part.

According to an advantageous embodiment of the invention it is provided that the first housing parts is designed as a pump motor housing and the second housing part as a pump head and vice versa. The first housing part is a pump housing and the second housing part is the pump head. In the context of the invention is also possible that the second housing part a

Pump motor housing and the first housing part is a pump head. It is also possible, for example, that one of the housing is a motor, a gearbox, an electronics housing, a control housing, a plug housing, a plug is a holder or a fuse.

Description of the drawings

Further features of the invention will become apparent from the other claims, the description and the drawings in the following in detail

described embodiments of the invention are shown. Show it FIG. 1 shows a first embodiment of an electrical machine,

FIG. 2 shows a plan view of the electrical machine according to FIG.

FIG. 3 shows a clamp according to a first exemplary embodiment,

FIG. 4 shows a further embodiment of a clamp 20,

FIG. 5 shows schematically an exemplary embodiment with a holding element in the holding area,

Figure 6 shows schematically an embodiment with a receiving recess in the holding area

FIG. 7 shows a plan view of an electric machine with a completely circumferential holding area,

Figure 8 shows an embodiment with a circumferential flange and

FIG. 9 shows an exemplary embodiment with a flange of the one

Receiving recess has.

FIG. 1 shows a first exemplary embodiment of an electric machine 1. The electric machine comprises a first housing part 10 and a second one

Housing part 11. The first housing part 10 has a first holding portion 14. The second housing part 11 has a second holding area 15. Each housing part includes a side surface 23 and at least one cover 22, which is shown in FIG. Figure 2 shows the top view of the electrical

The second holding portion 15 is located between the dashed lines and the outer circumference, or the outer edge 13 of the second housing part 11. The holding portion 15 extends on the entire circumference of the housing part 11. In the first housing part 10, the structure is identical and therefore not additionally shown. Depending on the field of application of the electric machine 1, the element 17 represents, for example, a shaft, a pump input or

Pump output or a cable duct. In Figure 1 is located between the first housing part 10 and the second housing part 11 a

Connecting element 18. The connecting element 18 may have the function of, for example, a wet seal, an insulator or a seal.

Further, the connecting element 18 may be part of a pole pot. The

Connecting element 18 corresponds to a ring on the pole pot. The pole pot separates the interior of the first and the interior of the second housing part,

in particular a wet room from a drying room and vice versa. For example, the pole pot and the first housing part 10 form the drying space and the pole pot and the second housing part 11 form the wet space and vice versa. Next are sealing rings between the pole pot, in particular the ring of the pole pot, or the connecting element 18 and the first and / or second housing part 10, 11. The sealing rings may be formed as an O-ring. But it is also conceivable every other form of the seal. Further, the sealing rings may be formed as a wet seal. To hold the two housing parts 10, 11 together, a first clamp 20 is used. The clamp 20 fastens the two housing parts 10, 11 to each other. The clip 20 compresses the connecting element 18 and thus, in the case that the connecting element 18 is a seal, improves the seal between the

Interior of the electric machine 1 and the environment of the electric machine 1 and vice versa. Next, in Figure 1, a further second bracket 21 is shown. Depending on the length of the holding area 14, 15 and the width of the

Staples 20, 21 may any number of staples 20, 21, in particular at least 2, preferably 3 to 5, ideally 3 staples 20, 21 for

Connection of the two housing parts 10, 11 are attached to the holding portion 14, 15.

A clamp 20 according to a first embodiment is shown in FIG. The clamp 20 includes a C-shaped portion 24. The C-shaped portion 24 is located between a first end portion 26 and a second end portion 27. The two end portions 26, 27 are respectively at the ends of the bracket 20. The end portions 26, 27 have a shape according to an S on. The first end section 26 has a first engagement element 30. The second end portion 27 has a second engagement element 31. The two engagement element 26, 27 act in the mounted state on the

Holding areas 14, 15. The engagement elements 30, 31 have a rounding. The rounding 33 is in direct communication with the holding area 14, 15. By the

Rounding 33, it is possible to connect the brackets with the two housing parts 10, 11 and remove again.

FIG. 4 shows a further embodiment of a clamp 20. The clamp comprises all the components according to the above-described clamp 20. However, it has a further curvature in the longitudinal direction. The others

Curvature is adapted to the curvature, for example, of the circular housing parts 10, 11. The radius of curvature in the longitudinal direction corresponds to the radius of the electric machine 1.

The holding region 14, 15 of the exemplary embodiment illustrated in FIG. 5 has a holding element 40 in each case. The holding element 40 runs as a kind of ring around the respective housing part 10, 11. The holding element 40, the respective housing part 10, 11 is made in one piece. The clamp 20 engages behind the engagement elements 30, 31, the holding elements 40. The holding member 40 prevents disengagement of the clamp 20 of one of the two housing parts 10, 11 and connected thereto a drop of the clamp 20 from the electrical

Machine 1. Further, the engagement members 30, 31 of the bracket 20 are brought into an optimal position for the cohesion of the housing parts 10, 11 during assembly in a. By rounding off the edges of the holding elements 40, the clamp 20 can best conform to the holding element 40. The rounded edges of the holding element correspond to the curves of the engagement elements 30, 31. FIG. 6 shows a further exemplary embodiment with a receiving recess 44 in the holding region 14, 15, of the first housing part 10 and of the second

Housing part 11, shown. The receiving recess 44 extends substantially corresponding to the holding portion 14 in the circumferential direction along the outer edge 13, the housing parts 10, 11, in the cover 22 of the respective housing part 10, 11. It has consistently the same distance from the outer edge 13 of Housing part 10, 11. The receiving recess 44 may for example be a groove. In the receiving edge 44 engage the engagement elements 30, 31 of the clip 20 a. The receiving recess 44, like the holding element 40 of FIG. 5, prevents the clamp 20 from slipping off the two housing parts.

Advantageously, the first and the second housing part 10, 11 formed circular and the holding elements, or the receiving recesses extend on a circular outer track in the holding portion 14, 15 of the two housing parts 10, 11. Thus, the invention allows a rotation of the two housing parts 10, eleventh relative to each other. This is of particular interest if

Inputs 54 and outputs 55, depending on the external conditions, such as the engine compartment in which the electric machine to be mounted, must be arranged differently. For example, in a first construction, a pump outlet must face in a first direction relative to one of the housing parts, whereas in a second construction the pump outlet must be in a first direction

Pump outlet in another direction must show. So far, a new housing had to be developed for this purpose. A small rotation, in particular 1 to 45 degrees, preferably 10 to 25 degrees, of the housing parts to each other is also possible. Thus, it is possible that the housing parts 10, 11 can still be used even with minimally different rotations.

FIG. 7 shows a plan view of a circular electric machine 1. A second housing part 11 with a cover 22 is shown. In the holding area 15 of the second housing part 11 extends a receiving recess 44, in particular a groove. In the receiving recess 44 engage the engagement elements 30, 31 of the bracket 20 a. Overall, the housing parts are held together by way of example by three brackets 20. The holding region 15 extends on an annular region on the cover 22.

FIG. 8 shows an embodiment with a peripheral flange region. The flange region consists of a first flange 50 and a second flange 51. The first housing part 10 has the first flange 50. The first flange 50 forms a ring around the side surface 23 of the circular first housing part 10. Further, the second housing part 11 comprises a second Flange 51. The second flange 51 forms a kind of ring around the side surface 23 of the second housing part 11. The first flange 50 and the second flange 51 are as close as possible, so with a small distance to each other. The two housing parts 10, 11 are separated from each other by the connecting element 18. The connecting element 18 also separates the two flanges 50, 51 from each other. Each flange comprises a holding region 14, 15. The clamp 20 also interacts here with the holding region 14, 15 of the two housing parts 10, 11. The clamp 20 presses the two housing parts 10, 11 against each other. The force of the clamp 20 is transmitted via the first and second flanges 50, 51 to the respective housing part. The flanges 50, 51 extend to the

Side surfaces 23 of the housing parts 10, 11th

Further, Figure 8 shows a pump. The first housing part 10 is the pump motor 10. The second housing part 11 is the pump head 11. The pump motor 10 drives a pump rotor. The pump rotor is not shown in FIG. 8 and is located inside the pump head 11. The pump head 11 comprises an inlet 54 and an outlet 55. Via the inlet 54

for example, a liquid sucked. Via the pump outlet 55, the liquid is pushed out again by a pump rotor. Due to the arrangement of the pump outlet 55 on the housing, the second flange 51 on the pump head 11 can not completely rotate. The pump outlet 55 interrupts the second flange 51. Nevertheless, the pump head and the pump motor can be connected to each other at any desired angle. Thus, the holder area does not have to completely revolve. It is sufficient if the holding area substantially completely revolves, in particular to 70 to 95%, preferably to 80 to 95%. The two housing parts 10, 11 can be fastened to one another via a plurality of clamps, in particular 2, 3, 4 or 5 clamps. Figure 9 shows an embodiment with a first and a second

Flange 50, 51 each having a receiving recess 44 in the holding portion 14, 15. The receiving recess 44 behaves in this case as already described above. Furthermore, it is conceivable that only one housing part, in particular the second

Housing part 11, a flange 50, 51 with a holding portion 15 includes. The further housing part, in particular the first housing part 10, has only a single holding area 14 and vice versa.

Claims

claims

1. Electrical machine (1), in particular pump, with a first

Housing part (10) and a second housing part (11), wherein at least one clamp (20), in particular two, three or four clamps (20), distributed over the circumference of the electric machine (1), characterized in that the first and the second housing part (10, 11) each have a substantially circumferential holding region (14, 15) and that at least one clamp (20) over the

Holding regions (14, 15), the first and the second housing part (10, 11) fasten to each other.

2. Electrical machine (1) according to claim 1, characterized

in that at least one holding region (10, 11) has at least one holding element (40), in particular a receiving recess (44), and at least one clip (20) cooperates with the holding element (40), in particular engages in the receiving recess (44).

3. Electrical machine (1) according to claim 2, characterized

characterized in that at least one retaining element (40) is in

Substantially over an entire holding area (14, 15), in particular the entire length of a holding portion (14, 15) extends.

4. Electrical machine (1) according to one of the preceding claims, characterized in that at least one holding region (14, 15) of the first and / or second housing part (10, 11), as a substantially circumferential flange (50, 51) is trained.

5. Electrical machine (1) according to claim 4, characterized

characterized in that at least one flange (50,51) and a

Housing part (10,11) are integrally formed.

6. Electrical machine (1) according to one of claims 2 to 5, characterized in that at least one clamp (20) has at least one free end portion (26, 27) and the at least one free end portion (26, 27) has an engagement element (30 , 31), wherein the engagement element (30, 31) cooperates with at least one retaining element (40).

7. Electrical machine (1) according to one of the preceding claims, characterized in that at least one clamp (20) as a spring clip, in particular of metal, preferably made of steel, is formed.

8. Electrical machine (1) according to one of the preceding claims, characterized in that at least one clamp (20) has a C-shaped basic shape.

9. Electrical machine (1) according to one of the preceding claims, characterized in that between the first and the second housing part (10, 11), a connecting element (18), in particular a seal, preferably a wet seal is arranged.

10. Electrical machine (1) according to one of the preceding claims, characterized in that between the first and the second housing part (10, 11), a connecting element (18) is arranged, wherein the connecting element (18) is part of a pole pot.

11. Pump according to one of the preceding claims, characterized

characterized in that the first housing parts (10) as

Pump motor housing and the second housing part (11) are designed as a pump head and vice versa.