US-12624706-B2 - Hydraulic pump and module formed from such a hydraulic pump and a receptacle

Abstract

A hydraulic pump includes a pump module and a main housing, the pump module has a pump housing and a cover. A pump element is arranged in the pump housing and is connected to a rotor arranged outside the pump housing, and the cover is latched to the pump housing by a first detent connection. The main housing has a stator, within which the rotor is arranged, and the main housing is latched to the cover by a second detent connection.

Inventors

• Roland Stoessel
• Patrick Gegner
• Katrin Ebert

Assignees

• VALEO POWERTRAIN GMBH

Dates

Publication Date

20260512

Application Date

20230606

Priority Date

20220621

Claims (20)

1. 1 . A hydraulic pump comprising: a pump module; and a main housing, wherein the pump module has a pump housing and a cover, wherein a pump element is arranged in the pump housing and is connected to a rotor arranged outside the pump housing, wherein the cover is latched to the pump housing by means of a first detent connection, wherein the main housing has a stator, within which the rotor is arranged, wherein the main housing is latched to the cover by means of a second detent connection, and wherein the first detent connection is separate from the second detent connection.
2. 2 . The hydraulic pump according to claim 1 , wherein the first and the second detent connections each have a deformation portion.
3. 3 . The hydraulic pump according to claim 1 , wherein the cover has a plurality of separate detent tabs, which extend along the outer side of the pump housing, each of the separate detent tabs are part of either the first detent connection or the second detent connection.
4. 4 . The hydraulic pump according to claim 3 , wherein the pump housing is provided with a clearance in regions that are adjacent to the detent tabs.
5. 5 . The hydraulic pump according to claim 4 , wherein the pump housing has at least two detent protrusions, which cooperate with detent tabs of the cover.
6. 6 . The hydraulic pump according to claim 3 , wherein the main housing has at least two detent protrusions, which cooperate with detent tabs of the cover.
7. 7 . The hydraulic pump according to claim 5 , wherein the detent protrusions are elastically deformable.
8. 8 . A module comprising a hydraulic pump according to claim 1 and a receptacle for the hydraulic pump, wherein a fastening device is provided, to which the hydraulic pump is fastened in the receptacle, wherein the fastening device is elastically deformable.
9. 9 . The module according to claim 8 , wherein the main housing is provided with two fastening arms, which can be connected to the receptacle such that the hydraulic pump is loaded the receptacle, wherein the fastening arms are elastically deformable.
10. 10 . The module according to claim 8 , wherein in one or more of the receptacle, the cover, the pump housing, and the main housing, at least one seal elastically deformable in the mounting direction is provided.
11. 11 . The hydraulic pump according to claim 2 , wherein the cover has a plurality of separate detent tabs, which extend along the outer side of the pump housing, each of the separate detent tabs are part of either the first detent connection or the second detent connection.
12. 12 . The hydraulic pump according to claim 4 , wherein the main housing has at least two detent protrusions, which cooperate with detent tabs of the cover.
13. 13 . The hydraulic pump according to claim 6 , wherein the detent protrusions are elastically deformable.
14. 14 . The module comprising a hydraulic pump according to claim 2 and a receptacle for the hydraulic pump, wherein a fastening device is provided, to which the hydraulic pump is fastened in the receptacle, wherein the fastening device is elastically deformable.
15. 15 . The module according to claim 9 , wherein in one or more of the receptacle, the cover, the pump housing, and the main housing, at least one seal elastically deformable in the mounting direction is provided.
16. 16 . The hydraulic pump according to claim 5 , wherein the main housing has at least two detent protrusions, which cooperate with detent tabs of the cover.
17. 17 . The module comprising a hydraulic pump according to claim 3 and a receptacle for the hydraulic pump, wherein a fastening device is provided, to which the hydraulic pump is fastened in the receptacle, wherein the fastening device is elastically deformable.
18. 18 . The module comprising a hydraulic pump according to claim 4 and a receptacle for the hydraulic pump, wherein a fastening device is provided, to which the hydraulic pump is fastened in the receptacle, wherein the fastening device is elastically deformable.
19. 19 . The module comprising a hydraulic pump according to claim 5 and a receptacle for the hydraulic pump, wherein a fastening device is provided, to which the hydraulic pump is fastened in the receptacle, wherein the fastening device is elastically deformable.
20. 20 . The module comprising a hydraulic pump according to claim 6 and a receptacle for the hydraulic pump, wherein a fastening device is provided, to which the hydraulic pump is fastened in the receptacle, wherein the fastening device is elastically deformable.

Description

The invention relates to a hydraulic pump, as can be used in particular in motor vehicles, in order to provide a hydraulic fluid flow for cooling (for example for cooling friction clutches), for supplying an actuator (for example for actuating a clutch or a gear actuator) or for lubrication (for example for lubricating a gearbox). The invention also relates to a module comprising such a hydraulic pump and a receptacle in which the hydraulic pump is mounted. It is known that the components of the hydraulic pumps can be pre-assembled in different configurations to form modules, which are then assembled together to form the finished hydraulic pump. The object of the invention is to provide a hydraulic pump which is particularly advantageous in respect of the assembly. To achieve this object, a hydraulic pump comprising a pump module and a main housing is provided according to the invention, wherein the pump module has a pump housing and a cover, wherein a pump element is arranged in the pump housing and is connected to a rotor arranged outside the pump housing, wherein the cover is latched to the pump housing by means of a first detent connection, wherein the pump housing has a stator, within which the rotor is arranged, and wherein the pump housing is latched to the cover by means of a second detent connection. The invention is based on the fundamental concept of using the cover with a dual function. On the one hand, the cover is used to close the pump housing with a pump element arranged therein. On the other hand, the cover is used to connect the pump module, formed of pump housing and cover, to the main housing. This results on the whole in a hydraulic pump which consists of very few individual components. According to a preferred embodiment of the invention, it is provided that the latch connection has a deformation portion. The deformation portion makes it possible to elastically prestress the detent connection, so that the desired tightness of the modules fastened to one another is achieved even after any slackening. According to an embodiment of the invention it is provided that the cover has a plurality of detent tabs, which extend along the outer side of the pump housing and are part of the first and the second latch connection. The cover is embodied here in the manner of a cap, which is fitted on the pump housing. The detent tabs facilitate the assembly process. The pump housing can be provided with a clearance in regions that are adjacent to the detent tabs. The clearance makes it possible to elastically deform the cover in the region of the detent tabs in order to apply the desired prestress force. As part of the detent connection, the pump housing and/or the main housing can each have at least two detent protrusions, which cooperate with detent tabs of the cover. The applied fastening forces can be diverted directly into corresponding housings by the detent protrusions arranged on the corresponding housing. According to an embodiment it is provided that the detent protrusions are elastically deformable. This is a further possibility for prestressing the detent connection elastically in the assembly direction. The invention also creates a module comprising a hydraulic pump of the aforementioned kind and a receptacle for the hydraulic pump, wherein a fastening device is provided, by means of which the hydraulic pump is fastened in the receptacle, wherein the fastening device is elastically deformable. The fastening device is elastically prestressed when the hydraulic pump is mounted in the receptacle, so that the hydraulic pump bears with the desired prestress against associated contact faces in the receptacle. The prestress does not decrease significantly on account of the elastic deformation of the fastening device, not even in the event of any slackening. According to an embodiment the main housing is provided with two fastening arms, which can be connected to the receptacle so that the hydraulic pump is loaded in the receptacle, wherein the fastening arms are elastically deformable. The fastening arms can protrude laterally from the main housing and can be deformable in the manner of leaf springs. According to an embodiment of the invention in the component chain receptacle, cover, pump housing, main housing at least one seal elastically deformable in the mounting direction is provided. The seal, similarly to the elastically deformable fastening device, ensures that the necessary prestress force and sealing are maintained, even in the event of any slackening. The invention will be described below on the basis of an embodiment which is illustrated in the appended drawings. In the drawings: FIG. 1 shows a first perspective view of the assembled hydraulic pump; FIG. 2 shows a second perspective view of the assembled hydraulic pump; FIG. 3 shows a side view of the hydraulic pump in FIG. 1; FIG. 4 shows a view from below of the hydraulic pump in FIG. 1; FIG. 5 shows a section along the plane V-V in