EP3371451B1 - Hydraulic device - Google Patents

Description

The present invention relates to a hydraulic device for a rail vehicle and in particular to an optimized arrangement of a motor-pump unit in hydraulic devices for rail vehicles.

A hydraulic device is a hydraulic control and supply unit that provides a controlled or regulated hydraulic flow for various components of the corresponding rail vehicle. For example, controllable valves can be formed in the hydraulic devices, which selectively activate or deactivate certain hydraulic lines in order to produce a volume flow there, wherein the hydraulic devices can be controlled via a vehicle control unit. Hydraulic devices generally consist of three main components: a control area with a control cover, an interconnection board (control plate) and a tank area with a tank for a hydraulic fluid. In addition, a motor and a pump usually couple to the control plate in order to pump the hydraulic fluid into the control plate.

Hydro devices are in the prior art, for example in DE 196 12 582 A1 described. The document describes a drive unit for a vehicle in which a hydraulic pump and an electric motor are housed within a hydraulic tank. Among other things, this is advantageous for sound absorption and for simultaneously achieving improved explosion protection.

The publication US2011 / 0173966 A1 teaches the person skilled in the art to arrange a hydraulic hose in a hydraulic tank in such a way that the suction end of the hose is always covered with hydraulic fluid even in various installation positions of the unit, in order to ensure problem-free operation.

document US2006 / 0000757 A1 describes the advantageous arrangement of a hydraulic unit in which the replacement of the filter immersed in the hydraulic fluid is associated with as little cleaning effort as possible.

The publication GB 1399071 describes the advantageous arrangement of the motor and pump in an injection molding system, through which a reduction in the noise level during operation can be achieved.

The publication EP 1 413 757 A2 describes a motor pump unit that includes the features according to the preamble of claim 1.

In the case of rail vehicles of a more recent design, such as, for example, trams which are manufactured in a low-floor version, the space available is increasingly restricted. As a result, there are increasing demands regarding the size of the individual components that have to be accommodated in the rail vehicle. For this reason, there is a requirement to reduce the size of the components, such as the hydraulic device, so that they can be accommodated in a space-saving manner in the reduced installation space. On the other hand, additional or additional functions are often to be accommodated in the same or in a decreasing installation space. Conventional hydro devices are increasingly no longer meeting these requirements.

Fig. 6 shows a first conventional hydraulic device for rail vehicles. It consists of a control area 440, a hydraulic circuit board 430 and a tank area 410. A pump 124 is arranged in the tank area 410 and a motor 122 is arranged in the control area 440. The motor 122 is connected to the pump 124 on the opposite side of the hydraulic circuit board 430 via a bushing 460 through the hydraulic circuit board 430. For example, the motor 122 and the pump 124 can have a common shaft that is passed directly through the bushing 460. Alternatively, it is possible for the motor shaft 122 to be coupled to one another in a corresponding shaft of the pump 124 via a coupling (not shown) in the bushing 460.

The pump 124 draws a liquid from the tank area 410 and pumps the hydraulic liquid through connecting channels (not in the Fig. 6 shown) in the hydraulic circuit board 430. Various electrical or hydraulic components can also be formed on the hydraulic circuit board 430, which are electrically controlled or electrically supplied via the control region 440 (or via the tank region).

Fig. 7 FIG. 4 shows a further conventional hydraulic device 500 with a tank area 510, a control unit 540 with integrated hydraulic circuit board 530 and an external motor-pump combination 122, 124, which is connected to the hydraulic circuit board 530 and to the tank area 510 via at least one fluid channel 520 Pump hydraulic fluid from the tank area 510 into the hydraulic circuit board 530. A motor flange 525 is also provided to hold the motor-pump combination 122, 124.

The hydraulic devices shown have the following disadvantages. First, the motor-pump combination 122, 124 takes up a lot of space on the control plate 430. As a result, fewer components can be arranged on the control plate 430. In addition, the passage 460 of the motor and pump shaft requires a breakthrough through the control plate 430. This breakthrough considerably reduces the control plate cross-section that can be used for the interconnection of the components and leads to complex designs for the connecting bores between the control plate 430 and the attached components (in FIGS Fig. 6 and 7 Not shown). With the special hydro device like it Fig. 7 shows, although there is a separation between the control plate 530 and the attachment of the motor-pump combination 122, 124, they require their own motor flange 525 and connecting elements 520 for transferring the volume flow from the motor flange 525 to the control plate 540, 530.

There is therefore a need for hydraulic devices for rail vehicles that either allow the size to be reduced or that additional functions can be accommodated in the same installation space.

The present invention solves the above-mentioned technical problem by means of a hydraulic device according to claim 1. The dependent claims relate to further advantageous developments.

The present invention relates to a hydraulic device for a rail vehicle, the hydraulic device comprising a tank area for a hydraulic fluid, a motor with a pump for pumping the hydraulic fluid, a hydraulic circuit board for providing hydraulic fluid paths and for receiving hydraulic components, and a control area for actuation the hydraulic components. The tank area and the control area are arranged on opposite sides of the hydraulic circuit board, and the motor is arranged together with the pump on one side of the hydraulic circuit board. The hydraulic device is characterized in that it further comprises a holding structure for holding the motor and the pump and the holding structure is held in the tank area and is coupled to the hydraulic circuit board, the motor and the pump not coupling directly to the hydraulic circuit board, but through the holding structure can be held independently of the hydraulic circuit board.

A liquid path is to be understood to mean all cavities through which a hydraulic liquid can be passed. The hydraulic fluid paths mentioned comprise, on the one hand, hydraulic lines which are led to the outside, but also fluid connections which are formed within the hydraulic circuit board and, for example, provide a connection from the pump to an exemplary valve. In addition, there is no need for a housing. If so, the hydraulic circuit board can, for example, be arranged in the housing in such a way that it separates the housing into two separate areas (the tank area and the control area).

The above-mentioned technical problem is solved by the present invention in that a hydraulic control and supply unit (hydraulic device) is created which has an identical functionality compared to the conventional hydraulic devices, but the necessary installation space when implemented reduced or allowed in their implementation more functions that can be implemented in the installation space.

In further exemplary embodiments, the hydraulic components comprise at least one valve and / or at least one sensor, which are electrically controllable. The control area can be designed as a cover and have a connection unit. The control area can also include an electrical circuit that interconnects the electrically controllable hydraulic components with the connection unit, so that the hydraulic components can be controlled from outside the housing.

In further exemplary embodiments, the pump is arranged between the motor and the hydraulic circuit board. Optionally, the motor can also be arranged between the pump and the hydraulic circuit board. An advantage of the first version is that the hydraulic fluid can be pumped directly from the pump into the hydraulic circuit board without the need for additional fluid lines. An advantage of the second version is that the motor is securely held by the hydraulic circuit board, so that a mechanically more stable construction can be achieved, in particular if the motor is larger than the pump.

In further exemplary embodiments, the pump and the motor comprise a common or two coupled rotary shaft (s), the rotary shaft (s) being / are spaced apart from the hydraulic circuit board. This means in particular that the rotary shaft of the pump and / or the rotary shaft of the motor do not couple to the hydraulic circuit board and thus cannot directly transmit vibrations to the hydraulic circuit board. For example, an intermediate space is formed between the rotary shaft (s) that suppresses the exemplary negative influences of vibrations on sensors or similar components.

In further exemplary embodiments, the pump is arranged together with the motor in the tank area. An advantage of this embodiment is that the motor can be cooled together with the pump by the liquid in the tank. In addition, a very efficient volume utilization is achieved as a result, since the tank volume only has to be increased to the extent that the volume of the combination of pump and motor comprises together.

In further exemplary embodiments, the tank area comprises a tank for storing the hydraulic fluid and the pump is accommodated in the tank together with the motor.

In further exemplary embodiments, the hydraulic device comprises a holding structure for holding the motor and / or the pump. The holding structure is held in the control area or in the tank area and couples to the hydraulic circuit board. An advantage of this embodiment is that it becomes possible to dampen the vibrations generated by the motor and / or the pump and not to transmit them directly to the circuit board with the hydraulic components formed thereon. In addition, existing structures can be used as holding structures.

In further exemplary embodiments, the holding structure is part of the tank area or part of the control area.

In further exemplary embodiments, the holding structure couples to the hydraulic circuit board or the pump is connected to the hydraulic circuit board via a line.

In further exemplary embodiments, the tank area comprises a tank housing and the control area comprises a cover, wherein the holding structure can be attached to the tank housing or the cover.

In further exemplary embodiments, the pump is arranged in the tank area and the motor is fastened to an outer wall of the tank area. The motor and the pump are optionally arranged on the hydraulic circuit board next to the tank area.

Another embodiment, which is not the subject of the present invention, also relates to a hydraulic device for a rail vehicle with a tank area for a hydraulic fluid, a hydraulic circuit board for providing hydraulic fluid paths and for receiving hydraulic components and a control area for controlling the hydraulic Components, wherein the tank area and the control area are arranged on opposite sides of the hydraulic circuit board. In addition, this hydraulic device comprises a pump for pumping the hydraulic fluid, which is arranged in the tank area. An attachment option is optionally provided on the tank area in order to attach a motor for operating the pump to an outer surface of the tank area.

The present invention also relates to a rail vehicle with one of the hydraulic devices described above.

Fig. 1

zeigt ein Hydrogerät für ein Schienenfahrzeug nach einem Ausführungsbeispiel der vorliegenden Erfindung.

Fig. 2

zeigt weitere Ausführungsformen des Hydrogerätes.

Fig. 3

zeigt Ausführungsbeispiele für Hydrogeräte mit einer Haltestruktur.

Fig. 4

zeigt Ausführungsbeispiele, in denen der Motor und die Pumpe an verschiedenen Positionen im Tankbereich angeordnet sind.

Fig. 5

zeigt Ausführungsbeispiele, in denen der Motor außerhalb des Tankbereiches angeordnet ist.

Fig. 6

zeigt ein erstes Hydrogerät konventioneller Bauart.

Fig. 7

zeigt ein zweites Hydrogerät konventioneller Bauart.

The embodiments of the present invention will be better understood from the following detailed description and the accompanying drawings of the different embodiments, which, however, should not be construed to limit the disclosure to the specific embodiments, but are for explanation and understanding only.

Fig. 1

shows a hydraulic device for a rail vehicle according to an embodiment of the present invention.

Fig. 2

shows further embodiments of the hydraulic device.

Fig. 3

shows exemplary embodiments for hydraulic devices with a holding structure.

Fig. 4

shows embodiments in which the motor and the pump are arranged at different positions in the tank area.

Fig. 5

shows embodiments in which the engine is arranged outside the tank area.

Fig. 6

shows a first hydro device of conventional design.

Fig. 7

shows a second hydraulic device of conventional design.

Fig. 1 shows a hydraulic device for a rail vehicle, the hydraulic device comprising the following components: a tank area 110 for a hydraulic fluid (not shown), a motor 122 with a pump 124 for pumping the hydraulic fluid, a hydraulic circuit board 130 for providing hydraulic fluid paths 132 , 133 and to accommodate hydraulic Components 134, a control area 140 for controlling the hydraulic components 134 and a housing 150. The tank area 110, the hydraulic circuit board 130 and the control area 140 are accommodated in the housing 150, the tank area 110 and the control area 140 on opposite sides and the motor 122 is arranged together with the pump 124 on one side of the hydraulic circuit board 130.

On the left side of the Fig. 1 the motor 122 is arranged together with the pump 124 in the tank area 110, while on the right side the motor 122 with the pump 124 is arranged in the control area 140.

The hydraulic components 134 can comprise, for example, valves and / or sensors that open or close the hydraulic flow paths 132, 133 or take measurements on the hydraulic fluid (for example pressure measurements). The hydraulic flow paths 132, 133 can be internal flow paths 132 between the components on the hydraulic circuit board 130 or else further hydraulic flow paths 133 that couple to an external hydraulic line (outside the housing). The valves can be, for example, electromagnetically controlled valves which are connected to a connection unit 144 via an electrical line 142, the connection unit 144 establishing a connection between the inner region of the housing 150 and the outer region. For example, the hydraulic device can be electrically controlled by a control unit of the rail vehicle via the connection unit 144, for example to read sensor data from the sensors or to control the valves via corresponding signals.

The hydraulic circuit board 130 divides the interior of the housing 150 into two sections, for example. The tank area 110, which in particular comprises the tank itself, is accommodated in one section, while the control area 140 is formed in the other area. The motor 122 together with the pump 124 can, for example, be arranged directly in the tank (see left side of FIG Fig. 1 ) so that the hydraulic fluid can flow around it. This offers the advantage that the hydraulic fluid is also used for cooling provides the motor 122 as well as for the pump 124. The accommodation of the motor 122 and the pump 124 in the tank area 110 also offers the advantage that more space is available in the control area 140 for additional or further hydraulic or non-hydraulic components. The control area 140 can, however, also be selected to be correspondingly smaller. The additional space required in the tank area 110, which must also be available due to the introduction of the motor 122 and the pump 124, is only limited to the volume of the motor 122 and the volume of the pump 124 itself, so that an additional additional space is required a minimum is limited. Moving the engine to the tank area can also reduce the height of the control cover. The tank cap can be enlarged by this amount. This means that the overall height of the device does not change and the available oil volume in the tank can be kept almost constant.

Fig. 2 shows exemplary embodiments in which the motor 122 and the pump 124 are accommodated in the tank area 110. There are two options here: the pump 124 is arranged between the motor 122 and the hydraulic circuit board 130 (see left side on the Fig. 2 ) or the motor 122 is arranged between the pump 124 and the hydraulic circuit board 130 (see right side of FIG Fig. 2 ).

The embodiment on the left of Fig. 2 Where the pump 124 is directly coupled to the hydraulic circuit board 130 offers the advantage that the hydraulic flow paths which are formed in the hydraulic circuit board 130 can be supplied directly with the hydraulic fluid by the pump 124.

In the embodiment on the right side of the Fig. 2 is an additional hydraulic flow line from the pump 124 to the hydraulic circuit board 130 is formed, which, however, in the Fig. 2 is not shown on the right. However, this embodiment offers the advantage that the motor 122 is fastened directly on the hydraulic circuit board 130 and thus has a better grip.

In either embodiment, the shaft that passes through motor 122 and pump 124 is not inserted into hydraulic circuit board 130. In particular, there may be a gap between the shaft and the hydraulic circuit board 130. Therefore, exemplary embodiments offer the further advantage that no additional holes or bores need to be formed in the hydraulic circuit board 130, so that the entire volume of the hydraulic circuit board 130 is available for the provision of hydraulic flow paths.

Fig. 3 shows further exemplary embodiments in which the motor 122 and the pump 124 do not couple directly to the hydraulic circuit board 130, but are held by a holding structure 115, 145. The holding structure 115, 145 can be, for example, a holding structure 115 of the tank area 110 or a holding structure 145 of the control area 140. On the left side of the Fig. 3 The exemplary embodiment is shown where the holding structure 115 is part of the tank area 110, so that the holding structure 110 holds the motor 122 and the pump 124 in the tank area 110. Optionally, the support structure 115 may also provide a connection 116 to the hydraulic circuit board 130 to direct the hydraulic fluid from the pump 124 to the hydraulic circuit board 130. In addition, another solution outside of the holding structure for hydraulic connections can also be used (for example a pipe or hose connection as in the Figure 4C is shown).

In the embodiment on the right side of the Fig. 3 , The holding structure 145 is part of the control area 140 and is held, for example, by a control cover. In this exemplary embodiment, an additional hydraulic flow path 146 from the pump 124 to the hydraulic circuit board 130 is formed. However, additional pipe or hose connections can also be formed in order to establish the hydraulic flow path. Furthermore, a connection to the tank is formed, which in the Fig. 3 is not shown.

Fig. 4 shows further exemplary embodiments in which the motor 122 and the pump 124 are arranged at different positions in the tank area 110.

In the Figure 4A the tank area 110 has a housing 150 in which the exemplary tank is accommodated (not shown in the figure). In this embodiment, the motor 122 is attached to the housing 150 and the pump 124 can be held by the motor 122 accordingly. For example, a line is formed between the pump 124 and the hydraulic circuit board 130, which is in the Figure 4A cannot be seen.

The Figure 4B shows a further possibility of fastening the motor 122 and the pump 124 on a side wall of the housing 150 and not on a wall of the housing 150 opposite the hydraulic circuit board 130 (as in FIG Figure 4A ).

The Figure 4C FIG. 12 shows an embodiment in which the holder structure 115 of the tank area 110 does not provide a hydraulic channel or flow path in order to pump the hydraulic fluid pumped by the pump 124 to the hydraulic circuit board 130. Instead, in this exemplary embodiment, a liquid line 118 is formed as a connection between the pump 124 and the hydraulic circuit board 130. Hydraulic line 118 can also be used in the same manner in FIGS 4A and 4B be trained, even if it is not visible there. In all three embodiments of the Fig. 4 The motor 122 and / or the pump 124 can be arranged in the tank or next to it. For example, the tank region 110 may have a cavity between the housing 150 and the liquid tank that can accommodate the motor 122 and the pump 124.

The Fig. 5 shows further exemplary embodiments in which at least the motor 122 is arranged outside the housing 150 of the tank area 110.

In the Figure 5A the motor 122 is attached to an outer surface of the housing 150. For this purpose, for example, a corresponding fastening option can be formed on the housing 150 of the tank area 110. Motor 122 again couples to pump 124, which in this exemplary embodiment is inside housing 150 is formed and can be located, for example, in the tank itself or in a corresponding cavity in the tank area 110.

The Figure 5B shows an embodiment in which the motor 122 together with the pump 124 is arranged next to the tank area 110, ie outside the housing 150 on the hydraulic circuit board 130. For example, a space 119 may be formed between the motor 122 and the housing 150.

The Figure 5C shows an embodiment in which the housing 150 of the tank area 110 has a recess which can accommodate the motor 122. The motor 122 again couples directly or via a coupling to the pump 124, which in this exemplary embodiment is fastened within the housing 150, that is to say to a bottom of the recess. For example, the cutout can be chosen to be large enough to accommodate the motor 122 completely or at least partially, so that it does not mount laterally or at the bottom when it is installed in the rail vehicle (as is the case in FIG Figure 5A can be seen) protrudes.

In other embodiments, the motor may also be attached to the housing 150 on a side wall of the housing (i.e., not opposite the hydraulic circuit board 130).

Exemplary embodiments of the present invention likewise relate to a hydraulic device which does not have a motor 122, but merely provides a fastening possibility in order to fasten the motor 122 to an outer housing of the tank area 110, for example.

1. (a) Der Motor 122 und die Pumpe 124 werden derart verbunden und auf einer Seite der hydraulischen Schaltungsplatine 130 angeordnet, dass ein Durchbruch durch die hydraulische Schaltungsplatine 130 (oder eine Änderung) nicht erforderlich ist.
2. (b) Der Motor 122 und die Pumpe 124 werden durch eine Haltestruktur 115, 145 als Teil des Steuerbereichs 140 oder des Tankbereichs 110 unabhängig von der hydraulischen Schaltungsplatine 130 gehalten, so dass keine separate Halterung an der hydraulischen Verschaltungsplatine 130 wie beispielsweise ein Motorflansch erforderlich ist. :
3. (c) Die vorliegende Erfindung bietet außerdem die Möglichkeit, den Motor 122 zusammen mit der Pumpe 124 im Ölvolumen des Tanks 110 als auch außerhalb des Ölvolumens anzuordnen (aber noch im Tankbereich).

Embodiments of the present invention have the following advantages:

1. (a) The motor 122 and the pump 124 are connected and arranged on one side of the hydraulic circuit board 130 such that a break through (or a change) through the hydraulic circuit board 130 is not required.
2. (b) The motor 122 and the pump 124 are held independently of the hydraulic circuit board 130 by a holding structure 115, 145 as part of the control area 140 or the tank area 110, so that no separate mounting on the hydraulic circuit board 130, such as a motor flange, is required . :
3. (c) The present invention also offers the possibility of arranging the motor 122 together with the pump 124 in the oil volume of the tank 110 as well as outside of the oil volume (but still in the tank area).

The features of the invention disclosed in the description, the claims and the figures can be essential for realizing the invention both individually and in any combination.

REFERENCE SIGN LIST

110

Tank area

115.145

Holding structure

122

engine

124

pump

130

hydraulic circuit board

132.133

Fluid paths

134

hydraulic components

140

Tax area

144

Connection unit

150

casing

410.510

Tank area of conventional design

440, 540

Control area of conventional design

430,530

hydraulic circuit board of conventional design

520

Fastener

525

Motor flange

Claims (10)

1. A hydraulic device for a rail vehicle having a tank region (110) for a hydraulic fluid, a motor (122) with a pump (124) for pumping the hydraulic fluid, a hydraulic connection panel (130) for providing hydraulic fluid paths (132) and receiving hydraulic components (134), and a control region (140) for actuating the hydraulic components (134),

   - the tank region (110) and the control region (140) being arranged on opposite sides of the hydraulic connection panel (130), and

   - the motor (122) being arranged together with the pump (124) on one side of the hydraulic connection panel (130),
   characterised in that

   - the hydraulic device further comprises a holding structure (115, 145) for holding the motor (122) and the pump (124) and that the holding structure (115, 145) is held in the tank region (110) and coupled to the hydraulic connection panel (130),

   - the motor (122) and the pump (124) being held independently of the hydraulic connection panel (130) by the holding structure (115, 145) rather than being coupled directly with the hydraulic connection panel (130).
2. A hydraulic device according to claim 1,
   characterised in that
   the hydraulic components (134) comprise at least one valve and/or at least one sensor that can be controlled electrically, that the control region (140) comprises a connector unit (144) and an electrical connection that connects electro-hydraulic components (134) to the connector unit (144) so that the electro-hydraulic components (134) can be actuated from outside the housing (150).
3. A hydraulic device according to claim 1 or claim 2,
   characterised in that
   the pump (124) is arranged between the motor (122) and the hydraulic connection panel (130), or that the motor (122) is arranged between the pump (124) and the hydraulic connection panel (130).
4. A hydraulic device according to any one of the preceding claims, the pump (124) and the motor (122) comprising one common shaft or two shafts coupled together,
   characterised in that
   the rotating shaft(s) is/are positioned a certain distance from the hydraulic connection panel (130).
5. A hydraulic device according to any one of the preceding claims,
   characterised in that
   the pump (124) is arranged together with the motor (122) in the tank region (122).
6. A hydraulic device according to claim 5,
   characterised in that
   the tank region (110) comprises a tank for storing the hydraulic fluid, and that the pump (124) is housed together in the tank with the motor (122).
7. A hydraulic device according to any one of the preceding claims,
   characterised in that
   the pump (124) is connected to the hydraulic connection panel (130) by a line.
8. A hydraulic device according to claim 7,
   characterised in that
   the tank region (110) comprises a tank housing, the control region comprises a cover and the holding structure (115, 145) is fastened to the tank housing or the cover.
9. A hydraulic device according to any one of the preceding claims,
   characterised in that
   the pump (124) is arranged in the tank region (110) and the motor (122) is fastened to an outer wall (150) of the tank region (110).
10. A rail vehicle having a hydraulic device according to any one of the preceding claims.

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