Hydraulic assembly

Abstract

This invention relates to a hydraulic assembly, which includes: a hydraulic unit; a connector; an orifice including an upper sealing surface and a lower sealing surface; a pipe joint arranged coaxially with the orifice; an upper gasket disposed between the upper sealing surface of the orifice and a head of the pipe joint; and a lower gasket disposed between the lower sealing surface of the orifice and a base of the hydraulic unit body. The connector includes a shoulder extending laterally in a radial direction relative to the orifice, the shoulder including a lower protrusion extending axially beside a side portion of the lower sealing surface of the orifice to avoid interference with the lower gasket. The base of the hydraulic unit body includes a cavity configured to complementaryly accommodate the lower protrusion, such that the connector is fault-proofly coupled to the hydraulic unit, thereby preventing rotation of the connector in the circumferential direction during assembly and use.

Description

Technical Field

[0001] The present invention relates to hydraulic components for braking systems and / or clutch circuits, particularly but not exclusively used in automotive or motorcycle applications. Background Technology

[0002] In hydraulic systems used to actuate brakes and / or clutches, multiple hydraulic connections are typically employed to connect hydraulic system piping to each other to deliver hydraulic fluid from a hydraulic control unit, such as a master cylinder, to hydraulic actuation units such as brake calipers, clutch pressure plates, etc.

[0003] Multiple hydraulic connections between hydraulic units must be fluid-tight to prevent leaks, which can cause inefficiencies and, in particular, malfunctions within the hydraulic system itself, endangering system users such as motorcyclists or car drivers.

[0004] Typically, hydraulic connections include at least one connector having a delivery pipe and an orifice. This connector is stacked on a feed channel formed in a hydraulic unit, such as a brake caliper, ABS manifold, or clutch pressure plate. The connector is secured to the hydraulic unit by means of a pipe fitting, which is coaxial with the orifice and secured to the hydraulic unit, for example, by means of a nut-screw mechanism. To ensure a hydraulic seal, lower and upper gaskets are respectively arranged between the hydraulic unit and the orifice, and between the orifice and the pipe fitting. However, in cases where one of the gaskets is missing, the mechanical interaction between the orifice and the hydraulic unit or between the orifice and the pipe fitting may be sufficient to maintain a hydraulic seal between components immediately following the assembly stage, and therefore may not intercept some faulty hydraulic components on the assembly line.

[0005] The applicant's document WO2018150365 describes a hydraulic connector for a hydraulic unit, configured to simply and effectively detect a potentially faulty component of at least one upper or lower gasket, thereby enabling the interception of a faulty hydraulic component before it is sold or installed in the corresponding vehicle. Specifically, the proposed solution provides a hydraulic connector with an upper and / or lower protrusion having an axial thickness smaller than the axial thickness of the corresponding gasket, so that if the corresponding lower or upper gasket is lost, the protrusion abuts against the base surface of the hydraulic unit and forms a gap, for example, between an orifice and the base surface of the hydraulic unit, from which hydraulic fluid can leak.

[0006] This solution teaches how to detect missing assembly of the gasket between the hydraulic unit and the connector, independent of the positioning between the hydraulic unit and the connector.

[0007] However, during the assembly of hydraulic components, it is crucial to properly position the connectors relative to the hydraulic unit to ensure a safe and durable sealed connection, and to prevent incorrect interaction when the hydraulic components are used with other components of the vehicle after they have been installed on the vehicle.

[0008] In the industry, there is a particularly strong demand for the correct positioning of the connectors and the hydraulic unit, which creates a paradoxical need for a hydraulic assembly that is easy to assemble quickly and has a high level of security to prevent external users from tampering with the connectors or accidental movement of the connectors to the hydraulic unit relative to their designed positions.

[0009] Document JP2011006033 describes a hydraulic connector configured to assist in the assembly of a hydraulic connector to a corresponding supply channel formed in a hydraulic unit, and configured to prevent the connector itself from rotating relative to the supply channel after it has been secured to the hydraulic unit via a corresponding pipe fitting. This solution includes providing the connector with an eyelet having a radially extending protrusion having a bent engagement end, wherein the hydraulic unit has a receiving portion on its base surface configured to accommodate the bent engagement end. Therefore, during assembly, when the bent end is inserted into the corresponding receiving portion, the connector can rotate relative to a fixed axis defined by the receiving portion, and the operator can rotate the connector until the eyelet is correctly aligned above the feed channel of the hydraulic unit before connecting the connector to the hydraulic unit.

[0010] While this solution is satisfactory in some respects, it has some drawbacks from a structural point of view. In particular, the protrusion is typically welded to the eyelet and plastically bent. This protrusion is a structural weakness in the system, increasing its fragility and thus causing it to lose its ability to prevent the connector from rotating over time. However, in cases where the hydraulic unit has multiple hydraulic ports—which can be associated with multiple connectors having such bent protrusions—the assembly of the hydraulic components can be particularly difficult because it is not immediately apparent which receiving portion is intended for which protrusion and which particular connector is intended for which inlet port.

[0011] US document US8511717 describes a manifold for an ABS hydraulic unit having multiple connector ports for corresponding connectors, wherein each connector has a block portion shaped to achieve positive engagement with at least one pair of adjacent block portions. In this way, the assembly and positioning of the multiple connectors is guided by the external shape of the block portion of each adjacent connector. While this solution is advantageous in some respects, the positioning of each block portion depends on the positioning of adjacent block portions, and therefore, during assembly, the user may have to make multiple attempts before finding the correct position of each block portion relative to its adjacent block portions. Consequently, this solution slows down assembly time and increases production costs.

[0012] However, it is worth noting that this solution works for hydraulic units with multiple connectors, but it loses its effectiveness in cases where there is only one inlet port, for example, where the correct positioning of the connectors in the hydraulic unit is not automatically defined by the first nearby connector because there is no first nearby connector.

[0013] Therefore, it was felt that there was a need to design a hydraulic assembly in which the correct positioning of the connectors relative to the hydraulic unit could be easily identified and maintained over time.

[0014] Furthermore, there is a need to design a hydraulic assembly in which the assembly time between each connector and its corresponding hydraulic unit can be reduced.

[0015] Furthermore, there is a need for a hydraulic assembly that can precisely define the correct position of each connector relative to its corresponding inlet port, thereby preventing the connector from rotating relative to the hydraulic unit during assembly and use. Optionally, the hydraulic assembly can also automatically detect gasket defects before the assembly is sold or subsequently assembled into the corresponding vehicle.

[0016] Therefore, the fundamental problem of this invention is to design a hydraulic assembly having structural and functional features to meet the above requirements, while simultaneously addressing the disadvantages described with reference to the prior art and satisfying the aforementioned needs. Summary of the Invention

[0017] The object of the present invention is to provide a hydraulic assembly having at least one connector and a hydraulic unit, which allows for non-rotational, easily identifiable, and well-defined positioning between the connector and the hydraulic unit.

[0018] These and other objects and advantages are achieved by the apparatus described in this application.

[0019] The proposed hydraulic system can achieve a clear connection between the hydraulic connector and the hydraulic unit, thereby preventing any rotation of the connector relative to its predetermined position during assembly or use.

[0020] This hydraulic component is particularly easy and cost-effective to manufacture.

[0021] This hydraulic component is particularly robust and tamper-proof compared to known solutions.

[0022] The hydraulic components according to the invention do not affect the standard assembly arrangement and can therefore be easily implemented in the assembly line. Furthermore, the presence of welded or plastically deformable connecting elements is avoided.

[0023] Analysis of this solution reveals how the proposed solution can achieve error-proof assembly between the connector and the hydraulic unit by utilizing the configuration and dimensions of the connector and hydraulic unit to allow only one assembly position, where such position is particularly stable and easily identifiable by the operator.

[0024] Furthermore, the proposed solution can reduce the assembly time of hydraulic components, thereby avoiding potential positioning errors between connectors and hydraulic units.

[0025] Additionally, the proposed solution allows for the interception of hydraulic components lacking bottom or top pads before they are pre-sold or sent to subsequent assembly lines, such as for installation on vehicles, without the need for additional controls on the assembly line.

[0026] Furthermore, the proposed solution ensures increased resistance to breakage. Attached Figure Description

[0027] Further features and advantages of the hydraulic assembly will become apparent from the following description of a preferred embodiment of the invention, given by way of non-limiting example, with reference to the accompanying drawings, in which:

[0028] - Figure 1 It is an isometric view of the connector of a hydraulic assembly known in the prior art;

[0029] - Figure 2 This is an isometric view of the connector of a hydraulic assembly according to an embodiment of the present invention;

[0030] - Figure 3 This is an isometric view of a connector of a hydraulic assembly according to another embodiment of the present invention;

[0031] - Figure 4 This is an isometric view of the details of the hydraulic unit of the hydraulic assembly according to the present invention;

[0032] - Figure 5 This is an isometric view of the hydraulic unit according to the present invention;

[0033] - Figure 6 It shows Figure 5 A side view showing details;

[0034] - Figure 7 yes Figure 6 Detailed cross-sectional view from Figure 6 Some components have been omitted.

[0035] - Figure 8 yes Figure 6 Detailed cross-sectional view;

[0036] - Figure 9 It is a pipe joint according to a preferred embodiment of the present invention. Detailed Implementation

[0037] A hydraulic assembly 1 for a braking system, particularly for a braking and / or clutch actuation system, is provided according to a general embodiment. However, the application of the invention should be considered in a broad and non-limiting sense, as it is applicable to all hydraulic connections and hydraulic units, such as brake calipers, master cylinders, ABS control units, valves, etc., preferably but not exclusively in the automotive field—understood as the field of motor vehicles and motorcycles.

[0038] The hydraulic assembly includes a hydraulic unit 2 having a hydraulic unit body 27 in which at least one delivery channel 12 is formed. The hydraulic unit body 27 includes a hydraulic unit body base 28 in which an inlet port 29 of the delivery channel 12 is formed.

[0039] The hydraulic assembly 1 further includes at least one connector 3, which is provided with a feed pipe 4 and an orifice 5. The feed pipe 4 is adapted to receive inlet hydraulic fluid, and the orifice 5 is adapted to output the fluid.

[0040] The connector 3 can be obtained, for example, from a semi-finished product by turning, milling, or forging.

[0041] The eyelet 5 defines the eyelet hole 19, which in turn defines the eyelet axis X. The eyelet axis X defines the axial direction AA, the radial direction RR, and the circumferential direction CC. The radial direction RR is perpendicular to the axial direction AA, and the circumferential direction CC is transverse to the axial direction AA and the radial direction RR.

[0042] The orifice 5 includes an upper sealing surface 32 and a lower sealing surface 31.

[0043] The feed pipe 4 is hollow to allow pressurized fluid to be delivered through the internal channel 20 via a connector that is in fluid communication with the orifice.

[0044] The hydraulic assembly 1 further includes at least one pipe connector 11 having a hollow cylindrical body and a pipe connector head. The hollow cylindrical body is configured to receive the fluid from the orifice 5 and deliver the fluid into the delivery channel 12.

[0045] The pipe fitting 11 is coaxially inserted into the eyelet 19.

[0046] The hydraulic assembly 11 includes at least one upper gasket 34, which is disposed between the upper sealing surface 32 of the orifice and the head of the pipe fitting.

[0047] The upper gasket 34 is typically annular, for example made of annealed copper, and is fitted coaxially with the tube fitting 11.

[0048] The hydraulic assembly 1 includes at least one lower gasket 35, which is disposed between the lower sealing surface 33 of the orifice and the base 28 of the hydraulic unit body.

[0049] The lower gasket 35 is typically annular, for example made of annealed copper, and is fitted coaxially with the tube fitting 11.

[0050] In the assembly configuration, the lower liner 35 and the upper liner 34 are axially compressed between the abutting surfaces of the respective components, which are axially arranged above and below the components.

[0051] The connector 3 includes at least one shoulder 8, which extends laterally relative to the eyelet 5 at least in the radial direction RR.

[0052] The shoulder 8 includes a lower protrusion 9 that extends along the axial direction AA near the side of the lower sealing surface 33 of the orifice so as not to interfere with the lower gasket 35.

[0053] The hydraulic unit body base 28 includes a cavity 31 configured to complementaryally accommodate the lower protrusion 9, such that the at least one connector 3 is connected to the hydraulic unit 2 in a fault-proof manner, thereby preventing the at least one connector 3 from rotating in the circumferential direction CC during both assembly and use.

[0054] According to one embodiment, the cavity 31 has a bottom surface 37 and a side surface 38. The side surface 38 extends at least along the axial direction AA around the bottom surface 37. The lower protrusion 9 is configured to abut against the bottom surface 37, and at least a portion of the side surface 38 prevents the connector 3 from moving along the radial direction RR.

[0055] According to an embodiment, the lower protrusion 9 and the recess 31 have a positive connection portion, such that a stable connection position is defined during the assembly of the connector 3 with the hydraulic unit 1, wherein the position defines a stable positioning in both the circumferential direction CC and the radial direction RR.

[0056] According to an embodiment, the cavity side surface 38 has at least a cavity radial inner portion 39 and a cavity radial outer portion 40.

[0057] According to an embodiment, the radially inner portion 39 of the cavity is flared to guide the lower protrusion 9 to the stable connection position.

[0058] According to the embodiment, in a stable connection position, the lower protrusion 9 abuts against the radially outer surface 40 and the cavity bottom surface 37.

[0059] According to an embodiment, the pipe joint 11 includes a pipe joint radial pipe 14 and a pipe joint axial pipe 16. The pipe joint radial pipe 14 is in fluid communication with the connector feed pipe 20, and the pipe joint axial pipe 16 is connected to the pipe joint radial pipe 14 and leads to the hydraulic unit body delivery channel 12.

[0060] According to the embodiment, the delivery channel 12 in the hydraulic unit 2 is threaded, the pipe joint 11 includes a pipe joint outer wall 17 having a pipe joint threaded portion 18, and the threaded delivery channel 12 accommodates the pipe joint threaded portion 18.

[0061] According to an embodiment, the head of the pipe fitting is opposite to the threaded portion 18 and includes at least one head bushing 26.

[0062] According to the embodiment (not shown), the head bushing 26 forms an undercut relative to the eyelet 5, thereby being placed against the upper sealing surface of the eyelet.

[0063] According to one embodiment, the head of the pipe fitting includes a profile adapted to facilitate screwing the pipe fitting.

[0064] According to the embodiment, the eyelet 5 has an inner wall 49, on which an eyelet opening 50 is provided. The internal feed channel 20 of the connector extends out from the eyelet opening 50, wherein the eyelet opening 50 faces the radial pipe 14 of the pipe connector to allow fluid connection between the feed pipe 20 and the hydraulic unit body feed channel 12.

[0065] According to one embodiment, the pipe joint 11 includes an annular crown 22 formed on the outer wall 17 of the pipe joint, through which the radial conduit 14 of the pipe joint extends. The annular crown 22 is formed in the form of a recess in the outer wall 17.

[0066] According to the embodiment, the internal feeding channel of the connector flows toward the annular crown 22 of the pipe joint.

[0067] In this way, there is no need for a perfect radial correspondence between the opening of the orifice and the radial conduit of the pipe fitting, because the fluid flows into the annular crown and thus into the radial conduit facing the corresponding annular crown.

[0068] According to the implementation method, such as Figure 7 As shown, the cavity 31 and the lower protrusion 9 are configured or sized such that, in the absence of the lower gasket 35, at least one leakage path is formed between the lower sealing surface 33 of the orifice and the base 28 of the hydraulic unit body, through which the hydraulic fluid leaks.

[0069] According to an embodiment, in the absence of the lower liner 33, the lower protrusion 9 abuts against the bottom surface 37 of the cavity, thereby preventing the lower abutment surface 33 of the orifice from abutting against the base 28 of the hydraulic unit body, and thus forming a gap 41 between the lower abutment surface 33 of the orifice and the base 28 of the hydraulic unit body, through which the hydraulic fluid leaks. Figure 7 This gap 41 is shown in the figure.

[0070] According to the embodiment, cavity 31 has an axial cavity depth, lower protrusion 9 has an axial lower protrusion thickness, and lower liner 35 has an axial lower liner thickness, wherein the cavity depth, the lower protrusion thickness, and the lower liner thickness are measured parallel to the axial direction AA.

[0071] According to the embodiment, the thickness of the axially lower protrusion is greater than the thickness of the axially lower liner and the depth of the axial cavity.

[0072] According to an embodiment, the gap 41 has an axial gap thickness measured in a direction parallel to the axial direction AA, wherein, in the absence of the lower liner 35, when the connector 3 is connected to the hydraulic unit 2 by means of the pipe joint 11, the axial gap thickness has a similar dimension to the axial lower liner thickness measured in a direction parallel to the axial direction AA.

[0073] Because the cavity 31 and the lower protrusion are sized relative to each other, hydraulic fluid leakage due to the absence of the lower gasket 35 can be detected when the connector is assembled to the hydraulic unit via the pipe fitting before the hydraulic assembly is sold or subsequently assembled onto a vehicle. Specifically, the gap 41 formed in the absence of the lower gasket 35 prevents the lower sealing surface 33 of the orifice from contacting the base of the hydraulic unit body 28, and therefore, there is no hydraulic seal between the two components 33, 28, and hydraulic fluid leakage can be easily and clearly detected.

[0074] According to an embodiment, the shoulder 8 includes an upper protrusion 10 that is opposite to the lower protrusion 9 in the diametrical direction and extends along the axial direction AA next to the side of the upper sealing surface 32 of the orifice so as not to interfere with the upper gasket 34.

[0075] According to an embodiment, the eyelet 5 includes an eyelet base 7 and an eyelet head 6 opposite each other in the diameter direction, wherein the eyelet base 7 is arranged on the side of the feed tube 4, and wherein the shoulder 8 exists on the eyelet base 7 or the eyelet head 6.

[0076] According to an embodiment, the upper protrusion 10 and the pipe fitting head are configured or sized such that, in the absence of the upper gasket 34, at least one leakage path is formed between the upper sealing surface 32 of the orifice and the pipe fitting head, through which the hydraulic fluid leaks.

[0077] According to an embodiment, the head of the pipe fitting has a radial volume portion along the radial direction RR, which at least partially abuts against the upper protrusion 10 in the absence of the upper gasket 34, such that the upper sealing surface 32 of the orifice does not abut against the head of the pipe fitting.

[0078] According to an embodiment, the hydraulic assembly 1 includes a second connector 43 that presents a second connector feed pipe 44 and a second connector eyelet 45.

[0079] The second feed pipe is adapted to receive the second input hydraulic fluid, and the second orifice 45 defines the second orifice 46, which defines the second orifice 46 along the axis X' of the second orifice that is aligned with the orifice axis X.

[0080] The second hole 45 includes an upper sealing surface 47 and a lower sealing surface 48.

[0081] According to the embodiment, the second eyelet 45 is arranged coaxially with the eyelet 19 between the top liner 34 and the head of the pipe fitting.

[0082] According to the embodiment, the upper gasket 34 is arranged between the upper sealing surface 32 of the orifice and the lower sealing surface 48 of the second orifice.

[0083] According to an embodiment, the hydraulic assembly 1 further includes a second upper gasket 36, which is disposed between the upper abutment surface 47 of the second orifice and the head of the pipe fitting.

[0084] According to an embodiment, the upper protrusion 10 and the second connector 43 are configured or sized such that, in the absence of the upper gasket 34, at least one leakage path is formed between the upper sealing surface 32 of the orifice and the lower sealing surface 48 of the second orifice, through which the hydraulic fluid leaks.

[0085] According to an embodiment, the pipe fitting 11 is also configured to receive the second fluid from the second orifice 45 and to send the second fluid into the delivery channel 12.

[0086] According to an embodiment, the pipe joint 11 includes at least one second pipe joint radial conduit 15 in fluid communication with the axial conduit 16 of the first pipe joint.

[0087] According to one embodiment, the second orifice 45 has an inner wall 51, on which a second orifice opening 52 is formed, through which the internal feed channel 44 of the second connector flows out. The second orifice opening 52 faces the radial conduit 15 of the second pipe joint to allow fluid connection between the second feed pipe and the hydraulic unit body supply channel 12.

[0088] According to one embodiment, the second pipe joint radial conduit 15 is arranged at a higher position in the axial direction compared to the pipe joint radial conduit 14.

[0089] According to one embodiment, the pipe connector 11 includes a second pipe connector annular crown 23 formed on the outer wall of the pipe connector, to which the radial conduit 15 of the second pipe connector flows. The second annular crown 23 is formed as a notch on the handle of the nozzle.

[0090] According to an embodiment, the second connector 43 has a radial volume portion in the radial direction RR, which at least partially abuts against the upper protrusion 10 in the absence of the upper gasket 34, such that the upper sealing surface 32 of the orifice does not abut against the lower abutting surface 48 of the second orifice.

[0091] According to the embodiment, as shown in the accompanying drawings, in the absence of the upper pad 34, the upper protrusion 10 abuts against the second feed pipe 44 of the second connector.

[0092] According to the embodiment (not shown), the upper protrusion 10 abuts against the shoulder of the second connector.

[0093] According to an embodiment, the hydraulic unit body base 28 includes a flat portion 30, which is adapted to at least partially accommodate a lower liner 35.

[0094] According to an embodiment, the cavity 31 is at least partially disposed radially outside the flat portion 30, such as... Figure 4 As shown in the image.

[0095] As can be understood from the above description, the present invention can overcome the shortcomings of the prior art.

[0096] It is worth noting that the present invention is relatively applicable to all hydraulic systems including hydraulic connectors and hydraulic units, such as brake calipers, master cylinders, ABS control units, valves, etc.

[0097] Furthermore, the present invention allows for safe, stable, and rapid assembly because a cavity is arranged at the connection between the lower protrusion and the base of the hydraulic unit body, such that a fail-safe stable position of the connector is achieved in a single operation by inserting the protrusion into the cavity, and the connector can therefore be fixed to the hydraulic unit by means of a pipe fitting.

[0098] By means of the shape of the cavity and the lower protrusion and the mechanical interaction between the cavity and the lower protrusion, the present invention can prevent any rotation of the connector relative to the hydraulic unit during assembly once the lower protrusion and the cavity are connected to each other.

[0099] The present invention can also detect the absence of at least the lower pad by means of the mutual dimensional determination of the lower protrusion and the cavity.

[0100] Therefore, the present invention can reduce the assembly time of hydraulic units by means of provided components that allow positive connection between hydraulic connectors and hydraulic units, which can be easily and intuitively achieved on existing assembly lines. At the same time, the present invention can reduce possible misalignment between hydraulic connectors and hydraulic units, and thus increase the yield of correctly assembled hydraulic components.

[0101] Furthermore, the proposed invention is advantageously applicable to hydraulic units having multiple hydraulic connection ports and multiple corresponding connectors, wherein the stable position between the connectors and the hydraulic connection ports can be easily identified by means of the arrangement of the corresponding slots and the shape of the corresponding protrusions.

[0102] Those skilled in the art can make various changes and modifications to the above embodiments, and all such changes and modifications are included within the scope of protection of the present invention as defined by the following claims to meet occasional or specific needs.

[0103] List of reference numerals

[0104] 1 Hydraulic components

[0105] 2 Hydraulic Unit

[0106] 3 Connectors

[0107] 4. Feed pipe

[0108] 5-hole eye

[0109] 6-hole head

[0110] 7. Base of the hole

[0111] 8. Shoulders

[0112] 9. Lower protrusion

[0113] 10. Upper protrusion

[0114] 11 Pipe joints

[0115] 12 Hydraulic unit body conveying channel

[0116] 14 Pipe joints, radial pipes

[0117] 15 Second pipe joint radial pipe

[0118] 16 Pipe joint axial pipe

[0119] 17. Outer wall of the pipe fitting

[0120] 18 Pipe joint threaded portion

[0121] 19 eyelets

[0122] 20 Internal channels of the feed pipe

[0123] 22 Pipe joint annular crown

[0124] 23 Second pipe joint annular crown

[0125] 26. Headliner

[0126] 27 Hydraulic Unit Body

[0127] 28. Base of hydraulic unit body

[0128] 29. Inlet of the conveyor channel

[0129] 30 Flat section

[0130] 31 cavities

[0131] 32-hole upper sealing surface

[0132] 33. Sealing surface at the lower part of the hole.

[0133] 34 Upper padding

[0134] 35 Lower padding

[0135] 36 Second upper pad

[0136] 37. Bottom surface of cavity

[0137] 38. Cavity side surface

[0138] 39 Radial internal portion

[0139] 40 Radial outer portion

[0140] 41 gap

[0141] 43 Second connector

[0142] 44 Second feed pipe

[0143] 45 Second hole

[0144] 46 Second eye hole

[0145] 47. Sealing surface at the upper part of the second hole

[0146] 48 Sealing surface at the lower part of the second hole

[0147] 49. Inner wall of the eyelet

[0148] 50mm eyelet opening

[0149] 51. Inner wall of the second hole

[0150] 52 Second hole opening

[0151] X-hole axis

[0152] X' Second eyelet axis

[0153] AA axial direction

[0154] RR radial direction

[0155] CC circumferential direction

[0156] H-band is high.

Claims

1. Hydraulic assembly (1) comprising: - a hydraulic unit (2) having a hydraulic unit body (27) in which at least one delivery channel (12) is present, wherein the hydraulic unit body (27) comprises a hydraulic unit body base (28) in which an inlet mouth (29) of the delivery channel (12) is present; the hydraulic assembly (1) further comprising at least one connection piece (3) comprising: - a feeding pipe (4) adapted to receive an incoming hydraulic fluid, and - an eye (5) adapted to output the hydraulic fluid, the eye (5) bounding an eye hole (19) defining an eye axis (X-X) defining an axial direction (A-A), a radial direction (R-R) perpendicular to the axial direction (A-A), and a circumferential direction (C-C) transversal to the axial direction (A-A) and the radial direction (R-R), wherein the eye (5) comprises an eye upper sealing surface (32) and an eye lower sealing surface (33); the hydraulic assembly (1) further comprising: - at least one pipe joint (11) having a hollow cylindrical body and a pipe joint head, wherein the hollow cylindrical body is configured to receive the hydraulic fluid from the eye (5) and introduce the hydraulic fluid into the delivery channel (12), wherein the pipe joint (11) is arranged coaxially to the eye hole (19), - at least one upper gasket (34) arranged between the eye upper sealing surface (32) and the pipe joint head, - at least one lower gasket (35) arranged between the eye lower sealing surface (33) and the hydraulic unit body base (28); the hydraulic assembly (1) being characterized in that the connection piece (3) comprises at least one shoulder (8) extending laterally to the eye (5) at least in the radial direction (R-R), wherein the shoulder (8) comprises an upper protrusion (10) and a lower protrusion (9), the upper protrusion (10) being opposite to the lower protrusion (9) in the axial direction (A-A), the upper protrusion (10) extending along the axial direction (A-A) beside a side of the eye upper sealing surface (32) so as not to interfere with the upper gasket (34), the lower protrusion (9) extending along the axial direction (A-A) beside a side of the eye lower sealing surface (33) so as not to interfere with the lower gasket (35). and wherein the hydraulic unit body base (28) comprises a cavity (31) configured to complementarily receive the lower protrusion (9) such that the at least one connection piece (3) is fail-safe coupled to the hydraulic unit (2) preventing a rotation of the at least one connection piece (3) in a circumferential direction (C-C) both during assembly and use.

2. The hydraulic assembly (1) according to claim 1, wherein The hydraulic assembly (1) is used for a brake system and / or for actuating a clutch.

3. Hydraulic assembly (1) according to claim 1 or 2, wherein The cavity (31) has a cavity bottom surface (37) and a cavity side surface (38), wherein the cavity side surface (38) extends at least along the axial direction (A-A) around the cavity bottom surface (37) to the cavity bottom surface (37), wherein the lower protrusion (9) abuts against the cavity bottom surface (37), and wherein at least a portion of the cavity side surface (38) prevents the connection piece (3) from moving in the radial direction (R-R) and / or wherein the lower protrusion (9) and the cavity (31) have a form coupling such that a stable connection position is defined in both the circumferential direction (C-C) and the radial direction (R-R) when the connection piece (3) is assembled to the hydraulic unit (2).

4. The hydraulic assembly (1) according to claim 3, wherein The cavity side surface (38) has at least one cavity radial inner portion (39) and at least one cavity radial outer portion (40), wherein the cavity radial inner portion (39) is flared to guide the lower protrusion (9) to the stable connection position in which the lower protrusion (9) abuts against the cavity radial outer portion (40) and the cavity bottom surface (37).

5. The hydraulic assembly (1) according to claim 3, wherein, The cavity (31) and the lower protrusion (9) are configured or dimensioned such that, in the absence of the lower gasket (35), at least one leakage route is formed between the eyelet lower sealing surface (33) and the hydraulic unit body base (28) through which the hydraulic fluid leaks; and / or wherein, In the absence of the lower gasket (35), the lower protrusion (9) abuts against the cavity bottom surface (37) preventing the eyelet lower sealing surface (33) from abutting against the hydraulic unit body base (28) and thus a gap (41) is formed between the eyelet lower sealing surface (33) and the hydraulic unit body base (28) through which the hydraulic fluid leaks.

6. The hydraulic assembly (1) according to claim 5, wherein The cavity (31) has an axial cavity depth, the lower protrusion (9) has an axial lower protrusion thickness, and the lower gasket (35) has an axial lower gasket thickness, wherein the axial cavity depth, the axial lower protrusion thickness, and the axial lower gasket thickness are measured parallel to the axial direction (A-A), wherein the axial lower protrusion thickness is greater than the axial lower gasket thickness and the axial cavity depth; and / or wherein said gap (41) has an axial gap thickness measured in a direction parallel to said axial direction (A-A), wherein, in the absence of said lower gasket (35), when said connection (3) is connected to said hydraulic unit (2) by means of said pipe joint (11), said axial gap thickness has a similar size to said axial lower gasket thickness measured in a direction parallel to said axial direction (A-A).

7. Hydraulic assembly (1) according to claim 1 or 2, wherein The eye (5) comprises an eye base (7) and an eye head (6) diametrically opposite, wherein the eye base (7) is arranged on a side of the feed pipe (4), wherein the shoulder (8) is present on the eye base (7) or on the eye head (6).

8. Hydraulic assembly (1) according to claim 1 or 2, wherein The hydraulic assembly (1) comprises a second connection (43) having a second feed pipe (44) adapted to receive a second incoming hydraulic fluid and a second eye (45) delimiting a second eye bore (46) defining a second eye axis (X'-X') coinciding with the eye axis (X-X), wherein the second eye bore (46) defines a second eye upper sealing surface (47) and a second eye lower sealing surface (48), wherein the second eye (45) is arranged coaxially with the eye bore (19) between the upper gasket (34) and the pipe joint head, wherein the upper gasket (34) is arranged between the eye upper sealing surface (32) and the second eye lower sealing surface (48), wherein the hydraulic assembly (1) further comprises a second upper gasket (36) arranged between the second eye upper sealing surface (47) and the pipe joint head, wherein the upper protrusion (10) and the second connection (43) are configured or dimensioned such that, in the absence of the upper gasket (34), at least one leakage route is formed between the eye upper sealing surface (32) and the second eye lower sealing surface (48) through which the second hydraulic fluid leaks, and wherein the pipe joint (11) is further configured to receive the second hydraulic fluid from the second eye (45) and to send the second hydraulic fluid into the delivery channel (12); or wherein the upper protrusion (10) and the pipe joint head are configured or dimensioned such that, in the absence of the upper gasket (34), at least one leakage route is formed between the eye upper sealing surface (32) and the pipe joint head through which the second hydraulic fluid leaks.

9. The hydraulic assembly (1) according to claim 8, wherein The pipe joint head has a radial volume in the radial direction (R-R) which at least partially abuts against the upper protrusion (10) in the absence of the upper gasket (34) so that the eyelet upper sealing surface (32) does not abut against the pipe joint head; or wherein the second connector (43) has a radial volume in the radial direction (R-R) which at least partially abuts against the upper protrusion (10) in the absence of the upper gasket (34) so that the eyelet upper sealing surface (32) does not abut against the second eyelet lower sealing surface (48).

10. Hydraulic assembly (1) according to claim 1 or 2, wherein The hydraulic unit body base (28) comprises a flat portion (30) suitable for at least partially housing the lower gasket (35), wherein the cavity (31) is at least partially radially arranged outside the flat portion (30).

11. Hydraulic assembly (1) according to claim 1 or 2, wherein The shoulder (8) is obtained from a semi-finished product by turning and / or milling and / or forging; and / or wherein the pipe joint comprises at least one pipe joint radial duct (14, 15) in fluid communication with the eyelet bore and a pipe joint axial duct (16) connected to the pipe joint radial duct (14, 15) and converging into the delivery channel (12); and / or wherein the delivery channel (12) present in the hydraulic unit (2) is threaded and wherein the pipe joint (11) comprises a pipe joint outer side wall (17) having a pipe joint threaded portion (18), wherein the threaded delivery channel (12) accommodates the pipe joint threaded portion (18).

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