Method for producing pump device
By connecting the metal shell of the pump device with the plastic components through thermal bonding, the problems of high manufacturing costs, large weight and unfriendly environment in the manufacturing process of the existing pump device are solved, and the manufacturing effect is low cost, light weight and environmentally friendly.
Patent Information
- Application Number
- CN202411261576.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-10-25
- Filing Date
- 2024-09-10
- Publication Date
- 2025-04-25
AI Technical Summary
The existing pump devices have high manufacturing costs, large weight and unfriendly environment during the manufacturing process.
The metal shell and the plastic member are connected through thermal bonding, eliminating separate connecting parts such as screws and adhesive materials to achieve mechanically stable thermal connection.
Reduces manufacturing costs, reduces weight, and improves environmentally friendly manufacturing and construction, enabling simplified and flexible manufacturing of pump devices.
Smart Images
Figure CN119878490A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a method for producing a pump device for conveying a fluid, in particular oil. The invention also relates to a pump device produced in this way. Background Art
[0002] The pump device is used to convey a fluid. The pump device has a plurality of components, such as a housing, a mechanism for conveying the fluid, and a drive for driving the mechanism. In order to manufacture the pump device, at least some of the components of the pump device are mechanically connected to each other. Summary of the invention
[0003] The invention is based on the object of providing an improved or at least different embodiment for a method for producing a pump device of the type described above and for a pump device produced in this way. In particular, the invention is based on the object of providing embodiments for the method and for the pump device which are distinguished by reduced production costs and / or reduced weight and / or improved environmental balance.
[0004] This object is achieved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claims.
[0005] The invention is therefore based on the following basic idea: the housing of the pump device is provided as a metal housing and at least one further component of the pump device is constructed, which can be connected to the metal housing, wherein, in order to connect the component to the metal housing, plastic is brought into contact with the metal housing and melted by means of heat supply, so that when the plastic is subsequently hardened, a thermally bonded connection between the metal housing and the component is achieved. In this way, in addition to the simple mechanical connection of the component to the metal housing, separate connecting parts, such as screws, adhesives or the like, are omitted. Therefore, the pump device is not only manufactured cost-effectively, but also manufactured in a weight-reduced manner. In addition, the elimination or at least reduced use of connecting parts of this type, in particular adhesives, leads to an environmentally friendly manufacture and construction of the pump device.
[0006] According to the concept of the invention, in order to manufacture a pump device, a metal housing and a component are provided. The component has plastic at least on the outside. In order to connect the component to the metal housing, the outside is brought into contact with a section of the metal housing, which is also referred to as the connecting section below. By heating, in particular inductively heating the metal housing, the plastic of the component melts on the connecting section and wets the connecting section. Next, the heating is terminated so that the plastic hardens and the component is thermally joined to the metal housing on the connecting section. That is, the component is connected to the metal housing on the connecting section by means of a thermally joined connection.
[0007] In the present case, a “metal housing” is to be understood as a housing made of metal or an alloy. Preferably, at least the connecting section is made of metal or an alloy.
[0008] In principle, the component can have plastic only on the outer side. That is to say, the component can be made of plastic only on the outer side.
[0009] For example, the component can be coated with plastic. In particular, the component can be injection-molded with plastic. In this way, the component does not consist entirely of plastic. This enables the use of multiple components to produce a thermally bonded connection of the type described.
[0010] Preferably, the component has plastic on its entire outer surface. That is to say, the component is made of plastic at least on its entire outer surface. This allows a simplified and flexible production of the pump device and a mechanically stable thermal connection between the metal housing and the component.
[0011] Advantageously, the component and the metal housing are mechanically loaded against each other at least when the plastic is melted. Thus, the metal housing can penetrate into the molten plastic. This leads to increased mechanical stability and loadability of the thermally bonded connection.
[0012] The pump device is used to convey a fluid. That is to say, the pump device conveys, in particular pumps, the fluid during operation. For this purpose, the pump device preferably has a correspondingly configured mechanism so that the mechanism conveys the fluid during actuation. For example, the mechanism can be a conveying wheel, a gear, an internal gear oil pump (Gerotor) and the like.
[0013] The drive is preferably electric. For this purpose, the drive advantageously has a stator group, which has a stator, which during operation cooperates with a rotor, which is connected to the mechanism in terms of drive.
[0014] The pump device can be used to convey any fluid.
[0015] For example, the fluid is a liquid, in particular oil. That is, the pump device is in particular an oil pump.
[0016] The pump device can be used in any application.
[0017] For example, such pump devices are used in motor vehicles in order to convey fluids, in particular oil, within the motor vehicle.
[0018] In a preferred embodiment, the connecting section has a protuberance pointing toward the component and a recess pointing away from the component. That is to say, a metal housing is provided, which has a connecting section, which has a protuberance and a recess. The protuberance and the recess can be manufactured in the following way: the connecting section is roughened. As a result, the molten plastic penetrates into the recess. As a result, the plastic hardens in the recess. The result is a mechanically more stable and more load-bearing connection of the component to the metal housing. Advantageously, the molten plastic fills the recess and then hardens in these recesses. This leads to a particularly stable mechanical connection of the component to the metal housing. Preferably, at the same time, the protuberance penetrates into the molten plastic and remains in the plastic that hardens subsequently. This in turn leads to improved mechanical stability and loadability of the joint connection.
[0019] In principle, the connecting section can be arranged at any position of the metal shell. That is to say, the component can be connected to the metal shell at any position of the metal shell.
[0020] In a preferred embodiment, the connecting section is arranged on the end side of the metal shell. That is to say, the outer side of the component is in contact with the end side of the metal shell as the connecting section. In particular, the end side can correspond to the connecting section.
[0021] Advantageously, the component is a stator assembly of a pump device.
[0022] Preferably, the stator of the stator assembly is injection-molded with plastic, so that the plastic forms the outer side of the stator assembly. That is, the stator assembly has a stator and plastic, and the plastic surrounds the stator in the form of a shell.
[0023] Preferably, the connecting section is formed on an end face of the metal housing, in particular, the end face corresponds to the connecting section. Advantageously, the connecting section extends obliquely or transversely with respect to the longitudinal center axis of the stator assembly, ie, in particular also with respect to the rotation axis of the drive. In this way, the stator assembly is also mounted on the metal housing in a torsionally mechanically stable manner about the rotation axis or the longitudinal center axis. Preferably, the elevations and depressions are oriented parallel or obliquely with respect to the longitudinal center axis or with respect to the rotation axis.
[0024] In principle, the component can be mechanically connected to the metal housing in another way besides the thermal joint.
[0025] Advantageously, the component is connected to the metal housing exclusively by means of a thermally bonded connection.
[0026] It is conceivable that after the heating is completed, the metal housing and / or the component is actively cooled. This results in a faster hardening of the plastic, which in particular leads to an increased cycle time during the production of the pump device.
[0027] It is clear that the pump device can also have two or more such components, which are each connected to the metal housing in the manner described above.
[0028] It will be appreciated that in addition to the method for manufacturing a pump device, the pump device so manufactured per se also falls within the scope of the present invention.
[0029] Further important features and advantages of the invention emerge from the dependent claims, the drawings and the associated description of the figures based on the drawings.
[0030] It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively stated combination but also in other combinations or alone without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar components or components having the same function.
[0032] The accompanying drawings schematically show:
[0033] Figure 1 An isometric view of a pump device having a metal housing and components is shown.
[0034] Figure 2 An isometric view of the component is shown,
[0035] Figure 3 An isometric view of the stator showing the component,
[0036] Figures 4 to 6 In each case a simplified sectional view is shown during a sequential step for producing a pump device. DETAILED DESCRIPTION
[0037] Pump device 1, as exemplified in Figure 1 As shown in FIG. 1 , the pump device 1 has a metal housing 2, for example made of aluminum. In addition, the pump device 1 has a component 3, which has plastic 5 at least on the outer side 4. In the embodiment shown, the component 4 is a part of the pump device 1. Figure 2 The stator group 6 is shown separately in FIG. The stator group 6 has Figure 3 The stator 7 shown separately in the figure is a component of a drive 8 (not shown in addition) of the pump device 1. During operation, the drive 8 drives a mechanism (not shown) for conveying a fluid, such as oil. Figure 2 and 3As can be seen from the overview of FIG. 1 , in the illustrated embodiment, the stator 8 is coated, in the illustrated embodiment, with plastic 5 in the stator assembly 6 . Therefore, in the illustrated embodiment, the entire outer surface of the stator assembly 6 is substantially formed by plastic 5 .
[0038] To manufacture the pump device 1, Figures 4 to 6 As shown, the outer side 4 of the component 3 is in contact with the section 9 of the metal shell 2 (see Figure 4 ), wherein the section 9 is also referred to below as the connecting section 9. In the illustrated embodiment, the connecting section 9 is arranged on the end side 10 of the metal housing 2, which faces the stator group 6 in the pump device 1. Figure 5 As shown, the metal housing 2 is heated by heat supply so that the plastic 5 of the component 3 melts on the connecting section 9 and wets the connecting section 9. When the heating is subsequently terminated, as shown in FIG. Figure 6 As shown, the hardening of the plastic 5 occurs so that the component 3 is thermally joined to the metal housing 2 on the connecting section 9. That is to say, the component 3 is connected to the metal housing 2 by means of a thermal joint connection. Here, the component 3 and / or the metal housing 2 can be actively cooled to make the plastic 5 harden more quickly. Therefore, the connection of the component 3 to the metal housing 2 can be achieved without additional components, especially without screws and adhesive materials. This leads to a simple, cost-effective, weight-reduced and environmentally friendly manufacture of the pump device 1. Here, in the illustrated embodiment, the component 3 is connected to the metal housing 2 only by means of a thermal joint connection.
[0039] If you can Figures 4 to 6 As can be seen from the overview of FIG, the metal housing 2 and the component 3 act mechanically on one another during production, in particular during the melting process of the plastic 5 .
[0040] In the illustrated embodiment, as can be seen from Figures 4 to 6 As can be seen in FIG. 1 , the connecting section 9 has a raised portion 12 and a recessed portion 11. The raised portion 12 points toward the component 3 and the recessed portion points away from the component 3. Before the connecting section 9 is brought into contact with the outer side 4, the raised portion 12 and the recessed portion 11 can be introduced into the connecting section 9 by roughening the connecting section 9. In this case, Figure 5 and 6 As shown in the comparison of FIG. 1 , the molten plastic penetrates into the depression 11. In the embodiment shown, as can be seen in particular from Figure 6 As can be seen in FIG. 1 , the molten plastic fills the depression 11. At the same time, the ridge 12 penetrates into the molten plastic 5. Therefore, the plastic 5 and thus the outer side 4 and the metal housing 2 penetrate into each other, so that the mechanical connection is stable.
[0041] like Figures 4 to 6 As shown, in the exemplary embodiment shown, the depressions 11 and the elevations 10 are oriented parallel or obliquely, in the exemplary embodiment shown, parallel to the longitudinal center axis A of the stator assembly 6. In the exemplary embodiment shown, the longitudinal center axis A extends parallel, in particular coaxially, to the rotation axis R of the drive 8. As a result, the connection of the stator assembly 6 to the metal housing 2 is particularly stable with respect to a rotation of the drive 8 about the rotation axis R.
Claims
1. A method for producing a pump device (1) for conveying a fluid, in particular oil, in, Providing a metal housing (2) of the pump device (1), A further component (3) of the pump device (1) is provided, which comprises a plastic (5) at least on the outer side (4). The outer side (4) is brought into contact with a connecting section (9) of the metal housing (2). wherein the metal housing (2) is heated so that the plastic (5) of the component (3) melts on the connecting section (9) and wets the connecting section (9), The heating is terminated in such a way that the plastic (5) hardens and the component (3) is thermally joined to the metal housing (2) at the connecting section (9).
2. The method according to claim 1, It is characterized in that A metal housing (2) is provided, which has a connecting section (9) with a depression (11) pointing away from the component (3) and into which molten plastic (5) penetrates.
3. The method according to claim 1 or 2, It is characterized in that The component (3) is coated, in particular extrusion-molded, with the plastic (5).
4. The method according to any one of claims 1 to 3, It is characterized in that The outer side (4) of the component (3) is brought into contact with the end side (10) of the metal housing (2) as a connecting section (9).
5. The method according to any one of claims 1 to 4, It is characterized in that A stator assembly (6) of a drive (8) of the pump device (1) is provided as a component (3).
6. The method according to claim 5 and claim 3 or 4, It is characterized in that A stator (7) of the stator assembly (6) is injection-molded with the plastic (5) so that the plastic (5) forms an outer side (4) of the stator assembly (6).
7. The method according to claims 5 and 6 and according to claims 2 and 4, It is characterized in that The outer side (4) of the stator assembly (6) is brought into contact with the end side (10) of the metal housing (2) as a connecting section (9). A metal housing (2) having a connecting section (9) is provided, the recess (11) of which is oriented parallel or obliquely with respect to the longitudinal center axis (A) of the stator assembly (6).
8. The method according to any one of claims 1 to 7, It is characterized in that The component (3) is connected to the metal housing (2) only by means of a thermal joint.
9. The method according to any one of claims 1 to 8, It is characterized in that The metal housing (2) and / or the component (3) are actively cooled in order to harden the plastic (5).
10. A pump device (1) for conveying a fluid, in particular oil, comprising a metal housing (2) and a further component (3) which comprises plastic (5) at least on the outer side (4), wherein: The pump device (1) is produced according to the method according to any one of claims 1 to 9.