FLAT SUPPORT FOR A VIBRATION DECOUPLING SYSTEM, IN PARTICULAR FOR A PUMP AND A SPEED REDUCER OF A MOTOR VEHICLE

Abstract

The invention relates to a flat support (SR) for a vibration decoupling system between a pump and a speed reducer (RV) of a motor vehicle, the flat support (SR) being configured to be secured to the speed reducer (RV) and to rest on a pump support equipped with fixing structures, the flat support (SR) comprising a pump hole (TP) receiving a pump body of the pump, characterized in that the flat support (SR) comprises at least one central coupling notch (EC) open on the pump hole (TP), the central notch (EC) being configured to cooperate with a peripheral groove of an internal groove decoupling device (A) to form the vibration decoupling system. The invention further relates to a corresponding vibration decoupling system. Fig. 1

Description

Title of the invention: FLAT SUPPORT FOR A VIBRATION DECOUPLING SYSTEM, IN PARTICULAR FOR A PUMP AND A SPEED REDUCER OF A MOTOR VEHICLE

[0001] The invention relates to the field of decoupling systems for thin motor vehicle parts, such as speed reducer and pump surfaces, at the level of a front block of an electric vehicle.

[0002] With the crisis of size and space in new vehicles due to the need to integrate the maximum number of options and functions, the construction of motor vehicles has moved towards fixing the pump in front of the speed reducer where the vibration constraints are very high.

[0003] It was therefore necessary to develop decoupling solutions to limit vibrations, preferably using a support in a material limiting supply constraints.

[0004] Existing decoupling devices are rubber dampers fitted directly onto a flat aluminum support which includes a specifically shaped peripheral notch open towards the outside of the plane of the flat support, to receive the dampers. These dampers include a peripheral groove cooperating with the notch of the flat support, the notch being open towards the outside of the flat support.

[0005] Unfortunately, this solution is not satisfactory because for a given thickness of the flat aluminum support, the mechanical and vibration resistance is not satisfactory, the shock absorber being liable to slip out of the open notch.

[0006] In the case of a flat aluminum support, it is necessary to increase the thickness of the support to improve the hold, but aluminum is not preferred because it involves supply constraints and difficulties in manufacturing a flat support.

[0007] In the case of a flat support made of sheet steel, the mechanical and vibration resistance of the flat support drops considerably. In fact, the notch cutouts to be pre-arranged on the flat support degrade the resistance to vibrations coming from the speed reducer.

[0008] An objective of the present invention is to propose a decoupling system for thin motor vehicle parts, easy to assemble with reduced assembly time, respecting the usual architecture of the components, and having good mechanical and vibration resistance while limiting supply and manufacturing constraints.

[0009] To achieve this objective, the invention proposes a flat support for a vibration decoupling system between a pump and a speed reducer of a motor vehicle, the flat support being configured to be secured to the speed reducer and to rest on a pump mounting support equipped with fixing structures, the flat support comprising a pump hole receiving a pump body of the pump, characterized in that the flat support comprises at least one central coupling notch open on the pump hole, the central notch being configured to cooperate with a peripheral groove of an internal groove decoupling device to form the vibration decoupling system.

[0010] Advantageously, the flat support makes it possible to limit vibrations between the components likely to vibrate and the thin sheet metal supports, while limiting the impacts on the holding of the flat steel supports thanks to the central notches closed by the pump body.

[0011] Furthermore, the flat support according to the invention involves easy assembly while respecting the architecture, vibration resistance as well as controlled cost of the support and assembly time in the factory.

[0012] According to a variant, said central notch is distant from the pump hole, and comprises a radial extension opening onto the pump hole. This makes it possible to improve vibration decoupling by moving the vibrating parts away from the pump body.

[0013] According to one variant, the flat support is made of steel sheet. This makes it possible to replace the aluminum solutions with supports made of thin, simple steel sheet with fewer supply constraints.

[0014] According to a variant, the flat support further comprises at least one peripheral coupling notch open to the outside of the flat support, the peripheral notch being configured to cooperate with a peripheral groove of an external groove decoupling device to form the vibration decoupling system. This makes it possible to provide coupling points at the edge of the flat support.

[0015] According to one variant, the flat support comprises two central notches and two peripheral notches, configured to be arranged around the pump body. This makes it possible to center the pump body with respect to the coupling points.

[0016] The invention further relates to a decoupling system for achieving vibration decoupling between a pump and a speed reducer of a motor vehicle, the pump comprising a mounting support equipped with fixing structures, the decoupling system comprising a flat support secured to the speed reducer and configured to rest on the mounting support, the flat support comprising a pump hole receiving a pump body of the pump, characterized in that the flat support comprises at least one central coupling notch open to the pump hole, and in that the decoupling system comprises at least one internal decoupling device comprising a peripheral groove configured to cooperate with the central notch, and a fixing insert cooperating with the fixing structures to achieve said vibrational decoupling.

[0017] According to a variant, said central notch is distant from the pump hole, and comprises a radial extension opening onto the pump hole.

[0018] According to one variant, the flat support is made of sheet steel.

[0019] According to a variant, the flat support further comprises at least one notch coupling device open to the outside of the flat support, and the decoupling system further comprises at least one external decoupling device comprising a peripheral groove configured to cooperate with the peripheral notch, and a fixing insert cooperating with the fixing structures to achieve said vibrational decoupling.

[0020] According to one variant, the flat support comprises two central notches and two peripheral notches, configured to be arranged around the pump body.

[0021] The invention further relates to a motor vehicle comprising a flat support according to the invention or a decoupling system according to the invention.

[0022] The invention will be further detailed by the description of non-limiting embodiments, and on the basis of the appended figures illustrating variants of the invention, in which: - [Fig.l] schematically illustrates a view in space of a flat support according to a preferred embodiment with vibration decoupling devices; - [Fig.2] schematically illustrates a spatial view of a decoupling device that can be used with a flat support according to the preferred embodiment; - [Fig.3] schematically illustrates a sectional view of the flat support of [Fig.l] with the vibration decoupling device of [Fig.2]; and - [Fig.4] schematically illustrates a spatial view of a speed reducer assembled with a pump by means of the flat support of [Fig.l] and four vibration decoupling devices.

[0023] The invention relates to a coupling support SR used with at least one decoupling device A, Al preferably used for vibration decoupling of a PV pump assembled with a speed reducer RV of a motor vehicle, in particular an electric vehicle.

[0024] The PV pump comprises a mounting support SP and the speed reducer is secured to the flat support SR which is to be fixed on the mounting support SP. The flat support SR comprises a first pump hole TP receiving a pump body CP, here cylindrical. The pump body CP passes through the pump hole TP vertically.

[0025] The SP support comprises SF fixing structures, here four screws, configured to pass through notches EC, EP of the flat support SR.

[0026] To limit vibration transmissions, said decoupling device A, A1 is provided in the assembly of the flat support SR on the laying support SP. It comprises a decoupling ring B made of flexible material and a rigid fixing insert IR.

[0027] According to the invention, the flat support SR comprises at least one central coupling notch EC open on the pump hole TP. In particular, said central notch is open towards the center of the flat support SR, and not towards the periphery externally. In addition, the central notch EC is configured to cooperate with a peripheral groove RP of a so-called internal groove decoupling device A. This assembly makes it possible to form the vibration decoupling system, in particular on four decoupling points.

[0028] In the illustrated variant, said central notch EC is distant from the pump hole TP, and comprises a radial extension PR opening onto the pump hole TP. In addition, the flat support SR is preferably made of sheet steel, for example stainless steel sheet so as to limit supply constraints.

[0029] The preferred flat support SR further comprises at least one peripheral coupling notch EP open to the outside of the flat support SR. The peripheral notch EP is open on a peripheral edge of the flat support SR, in particular a peripheral edge opposite the attachment of the flat support SR to the speed reducer RV. In addition, the peripheral notch EP is configured to cooperate with a peripheral groove RP of an external groove decoupling device Al. This assembly makes it possible to form another decoupling point of the vibration decoupling system.

[0030] In the illustrated variant, the flat support SR comprises two central notches EC and two peripheral notches EP. The notches EC, EP are configured to be arranged around the pump body CP, in particular in a centered manner.

[0031] The external decoupling devices A1 and internal A are preferably the same, but they may be different.

[0032] The ring B has a generally cylindrical shape. The preferred ring B comprises a central body BC and a peripheral rim BP extending around the central body BC, particularly at an upper portion of the central body BC. In [Fig. 3], the section hatching is omitted to clarify the drawing.

[0033] The flexibility of the ring B makes it compressible so as to allow the decoupling device A, A1 to be integrated into the central notch EC of the flat support SR.

[0034] The ring B comprises a rigid IR fixing insert configured to fix the decoupling device A to the laying support SP via the fixing structure SF. The IR fixing insert extends axially in the center of the central body BC of the ring B.

[0035] The IR fixing insert is preferably metallic. It protects the flexible ring body B from the SF fixing structure. The IR fixing insert allows surface contact with another corresponding fixing structure, here a tightening nut EF.

[0036] The ring B further comprises a peripheral groove RP configured to cooperate by shape cooperation with the corresponding notch EC, EP of the flat support SR. This can be illustrated by [Fig.3].

[0037] The peripheral groove RP is on the peripheral rim BP of the ring B.

[0038] According to a particular feature of the decoupling device A, the decoupling ring B further comprises at least one recess E1 allowing the compression of the ring B capable of making the peripheral groove RP cooperate with the central notch EC.

[0039] The recess is preferably peripheral and arranged below the peripheral groove RP with reference to a vertical direction.

[0040] In the illustrated variant, the central body BC surrounds the fixing insert IR, and the peripheral rim BP carries the peripheral groove RP. The peripheral recess El is arranged between the central body BC and the peripheral rim BP with reference to a radial direction.

[0041] Furthermore, in the illustrated variant, the ring B further comprises at least one upper recess ES arranged above the peripheral groove RP with reference to a vertical direction. The upper recess ES is preferably peripheral. It comprises radial ring reinforcements RS. The ring reinforcements RS are preferably prismatic and planar.

[0042] The flat support SR can also be used with a vibration decoupling device according to the prior art.

[0043] The flat support SR ensures the connection between the PV pump and the RV speed reducer with minimal impact on the production of said flat support SR, preferably made of stainless steel sheet.

[0044] Said decoupling device A, Al plays a role of limiting movements of the PV pump on the flat support SR by the presence of the notches EC, EP.

[0045] The invention further relates to the decoupling system comprising at least one decoupling device A and the corresponding flat support SR. The system makes it possible to achieve vibration decoupling between the PV pump and the speed reducer RV of a motor vehicle.

[0046] Another subject of the invention relates to a motor vehicle comprising a flat support as described above. This is in particular an electric vehicle.

[0047] The invention further relates to a method for assembling a PV pump and a speed reducer RV of a motor vehicle.

[0048] The method comprises a step for equipping the PV pump with a mounting support SP comprising fixing structures SF. In particular, the PV pump is provided with already mounted screws SF.

[0049] The method further comprises a step for securing a flat support SR equipped with the notches EC, EP, to the speed reducer RV. Preferably, the speed reducer RV is already secured to the flat support SR.

[0050] The method further comprises a step for inserting the decoupling devices A, A1 into the corresponding notches EC, EP. More specifically, the internal decoupling devices A are inserted into the central notches EC through the pump hole TP; and the external decoupling devices A1 are inserted into the peripheral notches EP through the outside of the flat support.

[0051] The decoupling devices A, Al thereby ensure the main function of vibration decoupling without impacting the mechanical strength.

[0052] The SF screws of the PV pump are subsequently slid into the IR fixing inserts of the decoupling devices A, AL

[0053] The method further comprises a step for fixing the decoupling devices A, AL. In particular, the tightening of the assembly is ensured at the end by nuts EF which will be positioned on the fixing insert IR of the decoupling device A. This corresponds to the illustration in [Fig.3].

Claims

Claims

1. Flat support (SR) for a vibration decoupling system between a pump (PV) and a speed reducer (RV) of a motor vehicle, the flat support (SR) being configured to be secured to the speed reducer (RV) and to rest on a support (SP) for placing the pump (PV) equipped with fixing structures (SF), the flat support (SR) comprising a pump hole (TP) receiving a pump body (CP) of the pump (PV), the flat support (SR) comprising at least one central coupling notch (EC) open on the pump hole (TP), the central notch (EC) being configured to cooperate with a peripheral groove (RP) of an internal decoupling device (A) with a groove to form the vibration decoupling system, this flat support being characterized in that it further comprises at least one peripheral coupling notch (EP) open on the outside of the flat support (SR),the peripheral notch (EP) being configured to cooperate with a peripheral groove (RP) of an external groove decoupling device (Al) to form the vibration decoupling system.,

2. Flat support (SR) according to claim 1, characterized in that said central notch (EC) is distant from the pump hole (TP), and comprises a radial extension (PR) opening onto the pump hole (TP).

3. Flat support (SR) according to any one of claims 1 to 2, characterized in that it is made of sheet steel.

4. Flat support (SR) according to one of claims 1 to 3, characterized in that it comprises two central notches (EC) and two peripheral notches (EP), configured to be arranged around the pump body (CP).

5. Decoupling system for achieving vibration decoupling between a pump (PV) and a speed reducer (RV) of a motor vehicle, the pump (PV) comprising a mounting support (SP) equipped with fixing structures (SF), the decoupling system comprising a flat support (SR) secured to the speed reducer (RV) and configured to rest on the mounting support (SP), the flat support (SR) comprising a pump hole (TP) receiving a pump body (CP) of the pump (PV), characterized in that the flat support (SR) comprises at least one central notch (EC) of

6.

7.

8. open coupling on the pump hole (TP), and in that the decoupling system comprises at least one internal decoupling device (A) comprising a peripheral groove (RP) configured to cooperate with the central notch (EC), and a fixing insert (IR) cooperating with the fixing structures (SF) to achieve said vibration decoupling, the flat support (SR) further comprising at least one peripheral coupling notch (EP) open on the outside of the flat support (SR), the decoupling system further comprising at least one external decoupling device (Al) comprising a peripheral groove (RP) configured to cooperate with the peripheral notch (EP), and a fixing insert (IR) cooperating with the fixing structures (SF) to achieve said vibration decoupling. Decoupling system according to claim 5, characterized in that said central notch (EC) is distant from the pump hole, and in that it comprises a radial extension (PR) opening onto the pump hole (TP). Decoupling system according to any one of claims 5 to 6, characterized in that the flat support (SR) is made of sheet steel. Motor vehicle comprising a flat support (SR) according to any one of claims 1 to 4.

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