Decoupling bracket for electro-hydraulic unit

Abstract

The invention relates to a decoupling bracket for an electro-hydraulic unit of a chassis of a motor vehicle, comprising at least the following components:-at least one damping support which can be connected to the electro-hydraulic unit in a force-transmitting manner; a damping body for each damping support; and a fastening support for connecting each damping body to a chassis bracket of the motor vehicle in a force-transmitting manner. The decoupling bracket is characterized in particular in that the fixing support comprises a receiving opening for the line bracket. The decoupling bracket proposed herein enables inexpensive and spatially optimized wiring.

Description

Technical Field

[0001] The invention relates to a decoupling bracket for an electrohydraulic unit and to a motor vehicle having such a decoupling bracket. Background Art

[0002] At present, it has been determined in many motor vehicles that the chassis is adjustable, for example the height is adjustable and / or the damping characteristics can be changed. Hydraulic fluid is used for this purpose, the pressure and volume of which (if necessary) can be actively changed in the damping system of the chassis. In particular, in view of the increasing electrification of the drive of motor vehicles, and in view of the response times and dynamic characteristics of such applications, electric pumps are used, i.e. one electric pump per axle or even per wheel. The pumping operation generates vibrations, which can be perceived as a disturbance by the passengers of the motor vehicle. Therefore, it is desirable to connect such an electrohydraulic unit to the chassis or chassis bracket of the motor vehicle in a damping manner. The electrohydraulic unit and other electrical operating units must be connected to lines (e.g. power cables, signal cables and / or hoses). On the one hand, they need to be laid in a well-protected manner, and on the other hand, as little construction space as possible is required, which is increasingly limited by the individual local (especially electrical) operating units. Summary of the invention

[0003] Based on this, the object of the present invention is to at least partially overcome the disadvantages known from the prior art. The features according to the invention are derived from the independent claims, and their advantageous configurations are given in the dependent claims. The features of the claims can be combined in any technically meaningful way, for this purpose, also from the features of the following description and the drawings, which include additional configurations of the invention.

[0004] The invention relates to a decoupling bracket for an electrohydraulic unit of a chassis of a motor vehicle, the decoupling bracket comprising at least the following components:

[0005] at least one shock-absorbing mount which can be connected in a force-transmitting manner to the electrohydraulic unit;

[0006] - a shock absorbing body for each shock absorbing mount; and

[0007] A fixing mount for connecting each shock-absorbing body to a chassis carrier of the motor vehicle in a force-transmitting manner.

[0008] The decoupling bracket is characterized in particular in that the fixing support comprises a receiving opening for the line bracket.

[0009] Unless expressly stated otherwise, ordinal numbers used in the preceding and following descriptions are used only for the purpose of clear distinction and do not reflect any order or ranking of the designated components. An ordinal number greater than one does not necessarily mean that another such component is present.

[0010] The decoupling bracket is designed to protect the electrohydraulic unit or other operating unit from vibrations from the chassis side or, conversely, to protect the chassis bracket from the introduction of vibrations from the unit, thereby preventing the generation of noise or other disruptive consequences of such vibrations. The decoupling bracket is therefore designed on the one hand for a sufficiently rigid connection of the respective unit and on the other hand for good shock-absorbing properties. It is advantageous to use a rubber-like material which is (at least approximately) incompressible and can dissipate the induced stresses as movements and heat. For example, so-called thermoplastic elastomers have an advantage due to their recyclability.

[0011] It should be noted that preferably two or more shock mounts are formed at each connection point on the chassis carrier, ie, for example four shock mounts are formed at two (axially spaced apart) connection points on the chassis carrier.

[0012] The shock mount is adapted to mechanically connect the decoupling bracket to the unit to be coupled. For example, the shock mount comprises one or more holes via which the decoupling bracket can be fixedly connected to the associated unit. The shock mount is further adapted such that a shock absorbing body can be fastened to the shock mount.

[0013] For example, the shock-absorbing mount comprises a hole into which the shock-absorbing body can be fastened in a form-fitting and / or force-fitting manner. Alternatively or additionally, the shock-absorbing body can be thermally connected, for example welded or vulcanized. It should be noted that in one embodiment, the shock-absorbing body is attached from the outside around a corresponding pin of the shock-absorbing mount. In one embodiment, the shock-absorbing body is a rotationally symmetrical component. In one embodiment, the shock-absorbing body is an angular, preferably quadrilateral component.

[0014] The fixing support is arranged outside the connection to the chassis bracket relative to the damping body, so that during use, force transmission (at least in operation according to the design) takes place exclusively via the damping material of the damping body. In one embodiment, the fixing support is designed as a sleeve or bolt (with or without thread) with a hole and / or a bolt-like outer surface. In one embodiment, the damping body is surrounded on the outside by the fixing support.

[0015] It is now proposed here that the fixing support comprises a receiving opening for the line bracket. The fixing support is arranged on the chassis side so that the line bracket is indirectly connected to the chassis bracket in the connected state via the receiving opening and is decoupled from the unit to be suspended (or not coupled at all). In the area in which the decoupling bracket is connected to the chassis bracket, there is usually enough space for lines (e.g. cables and / or hoses), in particular there is usually an area for the power supply cable of the unit in question. Furthermore, no additional construction space is required for fastening the line bracket. In one embodiment, the receiving opening is a hole, into which a screw or bolt of the line bracket can be inserted.

[0016] In a preferred embodiment of the decoupling bracket, it is further proposed that the receiving opening includes at least one undercut portion, and the line bracket includes a clamping piece for press-fitting and form-locking connection with the receiving opening via at least one undercut portion, wherein preferably, the undercut portion is formed by means of a threaded cut and the clamping piece includes a complementary Christmas tree-shaped structure.

[0017] In this embodiment, a snap connection is formed because the receiving opening has an undercut, behind which a complementary clamping element with barbs can be inserted in a form-fitting manner. For many applications, the transferable force of the form-fit is sufficient to hold at least one line by means of the line carrier.

[0018] In an advantageous embodiment, the undercut is formed by means of a thread cut. It should be noted that the term thread cut is formed by means of thread cutting only in one embodiment and does not exclude that it is formed by means of extrusion or by other conventional or yet to be developed means during casting of the component with the receiving opening.

[0019] In an advantageous embodiment, the clamp is formed by a so-called Christmas tree-like structure, which means that it has a plurality of arrow-shaped barbs along the axis (assembly direction). In one embodiment, some or all of these barbs are annular. Alternatively, the individual barbs of this type are arranged spaced apart from each other in the circumferential direction, for example also offset from each other in the axial sequence of the barbs in the circumferential direction. The Christmas tree-like structure is formed to match the pitch of the thread cut of the receiving opening.

[0020] In an advantageous embodiment of the decoupling bracket, it is further provided that the fastening bearing is formed by a preferably metallic bearing sleeve of the damping body.

[0021] Here, it is proposed that the damping body comprises a bearing sleeve, which is connected to the damping material of the damping body by means of, for example, vulcanization or heat welding. In one embodiment, in addition to or as an alternative to the material-bonded connection, the bushing is connected to the damping material of the damping body in a press fit and / or form-locking manner.

[0022] The support sleeve has a central opening for a fastening device, such as a screw. The opening is usually longer than required for the fastening device. Thus, for example, a receiving opening equipped with a threaded cutout can be connected in the axial extension of the opening without affecting the construction space. The receiving opening preferably has a diameter formed as a through hole for the head of the fastening device, such as a rivet, i.e. the diameter is greater than the head diameter of the fastening device. For example, the support sleeve has a collar on the end side (preferably formed circumferentially) in its opening, via which the support sleeve (and therefore the damping body) can be connected to the chassis bracket in a force-locking manner. In the extension of the opening on the head side of the collar, a receiving opening for the corresponding line bracket is formed, for example, by means of a threaded cutout over the entire length or a partial cross-section.

[0023] In an advantageous embodiment of the decoupling bracket it is further provided that the fastening bracket can be fastened to the chassis bracket of the motor vehicle by means of screws or by means of bolts, preferably by means of bolts.

[0024] In this embodiment, the fastening support of the damping body is detachably connected to the chassis bracket during insertion. Screws are used to form a connection that is easy to install and reliable over the desired service life. Large transverse forces or shear forces can be transmitted with the aid of bolts, which are easy to install and require less (axial) pressure than screws. Axial locking can then be achieved using, for example, a head and a retaining ring. The bolt is formed in a hybrid form, which is designed as a bolt in the area where the transverse forces are introduced and has a threaded section for axial fixing.

[0025] In an advantageous embodiment of the decoupling bracket, it is further provided that the receiving opening for the line bracket is designed as a through-hole for a screw or bolt, preferably for the head thereof.

[0026] In this embodiment (as already described above with reference to the embodiment with a bearing sleeve), a through hole is formed, through which the head of the screw, bolt (or bolt) or rivet can pass with clearance (i.e. undersized) up to a stop (formed, for example, by a collar on the end side).

[0027] In an advantageous embodiment of the decoupling bracket, it is further provided that the decoupling bracket is designed in the form of glasses and comprises two shock-absorbing mounts.

[0028] In this embodiment, two shock-absorbing mounts are provided, which are formed with a through-opening, in each of which a corresponding shock-absorbing body is accommodated in the assembled state. Preferably, the connection to the relevant unit (to be decoupled) is arranged centrally between the two shock-absorbing mounts, and in the case of an electrohydraulic unit, a hose connection for the hydraulic fluid to be conveyed is preferably also arranged.

[0029] In an advantageous embodiment of the decoupling bracket, it is further provided that the decoupling bracket has a contact surface which, when inserted, comes into direct contact with a corresponding counter surface of the electrohydraulic unit.

[0030] Preferably, without a damping device, the contact surface is fixedly connected to the shock mount and is particularly preferably formed integrally with the shock mount, for example as a cast component (formed in a single casting process) or as a component milled from a solid body. Alternatively or additionally, the contact surface and the shock mount are formed from an assembly by welding individual components.

[0031] The contact surface allows a large-area contact with the corresponding mating surface of the unit concerned, thereby achieving a small pressure per unit area or a large (preferably pure press fit or force-locking) force transmission with a small device (for example a screw connection). In a goggle-like embodiment with two shock-absorbing mounts, the contact surface is preferably arranged between the two shock-absorbing mounts. In a large number of shock-absorbing mounts, the contact surface is preferably arranged centrally between the shock-absorbing mounts. In one embodiment, for example, the channel for the hose is formed in the region of the contact surface (i.e., the region spatially surrounded by the contact surface).

[0032] According to another aspect, a motor vehicle is provided, the motor vehicle comprising at least the following components:

[0033] - at least one drive for driving the motor vehicle;

[0034] - a chassis having a chassis carrier and at least one drive wheel suspended on a wheel suspension;

[0035] - an electrohydraulic unit according to one of the above embodiments;

[0036] - a transport cabin supported by the chassis support; and

[0037] a transmission train, by means of which at least one drive is connected to at least one drive gear in a torque-transmitting manner,

[0038] Preferably, the damping characteristics of at least one wheel suspension can be dynamically adjusted by means of an electrohydraulic unit, particularly preferably.

[0039] For example, the motor vehicle is a conventional motor vehicle for transporting goods, such as a truck, and / or a conventional motor vehicle for transporting people, such as a bus. The motor vehicle is preferably suitable for semi-automatic or fully automatic driving and preferably has corresponding computing power (especially processor power) and sensors and at least one communication device, such as WLAN (Wireless Local Area Network) and / or mobile communication.

[0040] The transport cabin is suitable for accommodating at least one passenger (also referred to as a passenger cabin or passenger compartment) and / or transporting goods. For example, in a fully automatic motor vehicle for transporting goods, a passenger cabin is not provided.

[0041] The motor vehicle comprises at least one drive for driving, such as a rear drive (e.g. as a main drive) and a front drive (e.g. as an auxiliary drive). In one embodiment, at least one of the drives is an internal combustion engine. In one embodiment, at least one, preferably all drives are electric motors. Therefore, a traction battery is then provided to supply a sufficiently high voltage to at least one electric motor.

[0042] The drive train is configured (usually in a complex manner) to carry out torque and, if necessary, release of torque transmission and other torque-related tasks. For example, the drive train includes (possibly shiftable) transmission gears, a differential for each drive shaft, a disconnect clutch and a torsional damper. In one embodiment, a separate drive train is formed for each drive. In one embodiment, multiple drives are merged into a common drive train.

[0043] For example, the electro-hydraulic unit is configured to provide hydraulic pressure and / or volume changes to the shock absorber.Preferably, the electro-hydraulic unit is configured for high-speed requirements (such as adjustment of the shock absorbing characteristics when cornering) by means of an external or integrated computing device.

[0044] The chassis is adapted to track and transmit the torque of at least one drive, or to serve as a mechanical mount for the drive and drive train and wheel suspension. In one embodiment, the chassis carrier is part of a so-called motor vehicle chassis. The wheel suspension comprises a spring-shock absorber arrangement, for example one spring-shock absorber arrangement per wheel.

[0045] The wheel suspension comprises (e.g. hydraulic) shock absorbers. For example, the shock absorbers can be (dynamically) adjusted with the aid of an electrohydraulic unit for the driving mode of the motor vehicle or the current cornering stability. Alternatively or additionally, the (quasi-)static chassis height (i.e. the underbody clearance) can be adjusted with the aid of an electrohydraulic unit in conjunction with the wheel suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above invention is discussed in detail below in the context of the relevant technical background with reference to the accompanying drawings showing preferred embodiments. The present invention is not limited in any way by purely schematic drawings, whereby it should be noted that the drawings are not true to scale and are not suitable for defining dimensional relationships. The accompanying drawings show:

[0047] Figure 1 : is a part of the chassis, in which the electrohydraulic unit is mounted on the chassis bracket by means of a decoupling bracket;

[0048] Figure 2:It is based on Figure 1 An exploded view of a portion of the chassis;

[0049] Figure 3 :It is based on Figure 1 A top view of a decoupling bracket in a portion of a chassis;

[0050] Figure 4 : is a schematic side view of the line bracket;

[0051] Figure 5 : It is the basis of the line bracket and line Figure 3 a top view of the

[0052] Figure 6 : A motor vehicle with a chassis is shown in a schematic top view. DETAILED DESCRIPTION

[0053] Figure 1 A section of a chassis 3 is shown, in which an electrohydraulic unit 2 is mounted on a chassis bracket 8 by means of a decoupling bracket 1. A section of an electrohydraulic unit 2 is shown on the left side of the illustration. The decoupling bracket 1 can be seen on the right side of the illustration. The chassis bracket 8 is shown between the electrohydraulic unit 2 and the decoupling bracket 1. The decoupling bracket 1 is connected to a complementary mating surface 22 of the electrohydraulic unit 2 by means of a contact surface 21 in a force-locking manner (here by means of a screw connection 32). The decoupling bracket 1 is connected to the chassis bracket 8 via a shock-absorbing body 6 (formed, for example, from a thermoplastic elastomer), which is accommodated in a shock-absorbing mount 5 and is fastened here by means of screws 16 (with a Figure 2 compared to).

[0054] Figure 2 Shown according to Figure 1Exploded view of a part of the chassis 3 of FIG. 1 , in which the electrohydraulic unit 2, the chassis bracket 8 and the decoupling bracket 1 are shown in the correct relative position. Reference is made to the above description and the components that are only visible here are explained in more detail. For the sake of clarity, not all details are provided with reference numerals. Here, the decoupling bracket 1 is constructed in a manner similar to glasses with two shock-absorbing mounts 5 and shock-absorbing bodies 6, wherein the hydraulic connection 33 and the screw connection 32 are located centrally between the two shock-absorbing mounts 5. In the embodiment shown, the bearing sleeve 15 is arranged in the corresponding shock-absorbing body 6 (shown here in the exploded view as pulled out to the right front along the assembly axis 34). The bearing sleeve 15 forms a fixing support 7 which is designed as a through hole 19 (with a concealed end ring as a stop for the head 20) for a screw 16, bolt 18 or bolt 17 (shown here in the exploded view as being pulled out to the right front along the mounting axis 34), by means of which the electrohydraulic unit 2 is fastened to the chassis bracket 8 which is decoupled from the vibrations via the damper material of the damping body 6. The through hole 19 is designed with a structure for forming an undercut 11, for example with a threaded cutout 13, so that the line bracket 10 can be fastened by means of (for example, as Figure 4 The clamping element 12 (shown) is connected to the through-hole 19 in a form-fitting and / or force-fitting manner.

[0055] Figure 3 Shown according to Figure 1 and Figure 2 3. Here also reference is made to the above description and the components which are only visible here are explained in more detail. For the sake of clarity, not all details are provided with reference numerals. It can be seen that the screw 16 (or bolt 18 or bolt 17, with Figure 2 The head 20 of the support sleeve 15 (in contrast to the head 20 of the support sleeve 15) is recessed in the through hole 19 of the support sleeve 15 (in contact with the corresponding collar (hidden here)) and forms the through hole 19 for the fixing seat 7 of the decoupling bracket 1 connected to the receiving opening 9 along the mounting axis 34. For example, this through hole (as already described) is equipped with a threaded cutout 13 as an undercut 11 for the clamping piece 12 of the line bracket 10.

[0056] Figure 4 A schematic side view of a line carrier 10 is shown. On the right side of the illustration, it has a (here C-shaped) line holder 31 which is suitable for receiving a line 30 and preferably also receives it in a form-fitting and / or force-fitting manner. Figure 5 On the left side of the figure is the clamping element 12, which is designed here with a Christmas tree-like structure 14, for example, to engage in the threaded portion 13 in a form-fitting and press-fitting manner.

[0057] Figure 5 The circuit diagram of the embodiment of the present invention is shown in FIG. Figure 3 Here too, reference is made to the above description and only the components visible here are explained in more detail. For the sake of clarity, not all details are provided with reference numerals. The line bracket 10 is inserted into the receiving opening 9 (with the support sleeve 15) of the support sleeve 15. Figure 3 The line 30 is received by a (here C-shaped) line holder 31 of the line bracket 10. Here, the line 30 is, for example, a cable for power current and / or signal lines. Here, the line 30 (only optionally) comprises a plurality of branched wire strands, and a branch 35 is connected from the plurality of branch wires to the electro-hydraulic unit 2. It can be seen here that the line 30 makes optimal use of the free construction space, for example without colliding with hoses for the hydraulic connection 33 (not connected here), and even the screw connection 32 of the decoupling bracket 1 remains freely accessible.

[0058] Figure 6 A schematic top view of a motor vehicle 4 with a chassis 3 is shown, wherein a chassis support 8 can be seen at the front (shown on the right) and at the rear (shown on the left). The motor vehicle 4 (only optionally) has a rear drive 23 and a front drive 24, which are connected to a common transmission train 29 via a cardan shaft 38 for transmitting torque to the drive wheels 26, 27. Here, the (e.g., shiftable) transmission gear 39 is still visible from the drive train 29. The motor vehicle 4 can be controlled from the transport compartment 28 (here, for example, for accommodating passengers) by means of a steering wheel 36 via a steering shaft 37. The chassis 3 carrying the transport compartment 28 comprises two wheel suspensions 25 for the respective wheels (here all drive wheels 26, 27) on each of the chassis carriers 8. The electrohydraulic unit 2 is arranged between the respective pair of drive wheels 26, 27. It can be seen that the construction space for the line 30, which is sufficiently protected, is very limited.

[0059] The decoupling bracket proposed in this paper enables cheap and space-optimized line routing.

Claims

1. A decoupling bracket (1) for an electrohydraulic unit (2) of a chassis (3) of a motor vehicle (4), the decoupling bracket comprising at least the following components: - at least one shock-absorbing mount (5) which can be connected to the electrohydraulic unit (2) in a force-transmitting manner; - a shock absorbing body (6) for each shock absorbing mount (5); and - a fixing mount (7) for connecting the respective shock-absorbing body (6) to a chassis bracket (8) of the motor vehicle (4) in a force-transmitting manner, It is characterized in that The fixing support (7) comprises a receiving opening (9) for a line bracket (10).

2. The decoupling bracket (1) according to claim 1, wherein: The receiving opening (9) comprises at least one undercut (11), and the line bracket (10) comprises a clamping piece (12) for being connected to the receiving opening (9) in a force-locking and form-locking manner by means of the at least one undercut (11), wherein preferably, the undercut (11) is formed by means of a threaded cut (13), and the clamping piece (12) has a complementary Christmas tree-like structure (14).

3. The decoupling bracket (1) according to claim 1 or 2, wherein: The fastening bearing (7) is formed by a preferably metallic bearing sleeve (15) of the damping body (6).

4. A decoupling bracket (1) according to any one of the preceding claims, wherein: The fixing support (7) can be fastened to a chassis support (8) of a motor vehicle (4) by means of screws (16) or by means of bolts (17), preferably by means of bolts (18).

5. The decoupling bracket (1) according to claim 4, wherein: The receiving opening (9) for the line bracket (10) is designed as a through-hole (19) for the screw (16) or the bolt (17), preferably for the head (20) thereof.

6. A decoupling bracket (1) according to any one of the preceding claims, wherein: The decoupling bracket (1) is constructed in the shape of glasses and comprises two shock-absorbing supports (5).

7. A decoupling bracket (1) according to any one of the preceding claims, wherein: The decoupling bracket (1) comprises a contact surface (21) which, when inserted, comes into direct contact with a corresponding mating surface (22) of the electro-hydraulic unit (2).

8. A motor vehicle (4), comprising at least the following components: - at least one drive (23, 24) for driving the motor vehicle (4); - a chassis (3) having a chassis frame (8) and at least one drive wheel (26, 27) suspended on a wheel suspension (25); - An electrohydraulic unit (2) according to any one of the preceding claims; - a transport compartment (28) carried by the chassis carrier (8); and a drive train (29), by means of which the at least one drive (23, 24) is connected to the at least one drive wheel (26, 27) in a torque-transmitting manner, Preferably, the damping characteristics of at least one wheel suspension (25) can be dynamically adjusted by means of the electrohydraulic unit (2), particularly preferably.

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