阅读说明：本技术 用于轮式车辆的悬架装置 (Suspension device for wheeled vehicle ) 是由 H-J·哈廷 J-U·格洛 于 2018-11-14 设计创作，主要内容包括：用于轮式车辆的悬架装置。说明了一种用于轮式车辆的悬架装置,其具有多个空气弹簧。在此,车辆车桥的两个空气弹簧的相应两个主气室(2、3、4、5)通过形成中间体积的横向气室(13、14)彼此连接。布置在两个横向气室(13、14)之间的压缩机(1)通过里面布置有第一可切换的阀(16)的第一连接线路(10)与第一横向气室(13)连接,并且通过里面布置有第二可切换的阀(15)的第二连接线路(II)与第二横向气室(14)连接,使得可实现两个横向气室的中间体积的直接填充/直接排空。(A suspension device for a wheeled vehicle. A suspension arrangement for a wheeled vehicle is described having a plurality of air springs. In this case, the two main air chambers (2, 3, 4, 5) of the two air springs of the vehicle axle are connected to one another by means of a transverse air chamber (13, 14) which forms an intermediate volume. A compressor (1) arranged between the two transverse air chambers (13, 14) is connected to the first transverse air chamber (13) via a first connecting line (10) in which a first switchable valve (16) is arranged, and is connected to the second transverse air chamber (14) via a second connecting line (II) in which a second switchable valve (15) is arranged, so that a direct filling/direct emptying of the intermediate volume of the two transverse air chambers can be achieved.)

1. A suspension device for a wheeled vehicle, having a plurality of air springs which are each arranged on the wheel suspension of a respective wheel and each comprise a main air chamber, the main air chambers of two air springs of the same axle being connectable to and separable from a common transverse air chamber arranged therebetween by means of a respectively assigned control valve, the suspension device having a compressor with a filling valve and a discharge valve communicating with the environment, characterized in that a compressor (1) arranged between two transverse air chambers (13, 14) is connected to a first transverse air chamber (13) by means of a first connecting line (10) and to a second transverse air chamber (14) by means of a second connecting line (11), a first switchable valve (16) is arranged in the first connecting line, and a second switchable valve (15) is arranged in the second connecting line.

2. Suspension arrangement according to claim 1, characterized in that it has a storage container (17) assigned to the compressor (1).

3. Suspension arrangement according to claim 1 or 2, characterized in that the suspension arrangement is configured as a closed levelness adjusting device.

4. Suspension arrangement according to any of the preceding claims, characterized in that the first connection line (10) and the second connection line (11) comprise a line connecting a first transverse air chamber (13) and a second transverse air chamber (14), in which line the two valves (15, 16) are arranged to be switchable, between which the line from the compressor (1) opens.

5. Suspension arrangement according to claim 4, characterized in that two bypass lines (22, 23) are provided for the two switchable valves (15, 16).

Technical Field

The invention relates to a suspension device for a wheeled vehicle, having a plurality of air springs which are each arranged on the wheel suspension of a respective wheel and each comprise a main air chamber, the main air chambers of two air springs of the same axle being connectable to and separable from a common transverse air chamber arranged therebetween by means of a respectively assigned control valve, the suspension device having a compressor with a filling valve and a discharge valve which communicates with the environment.

Background

DE 3502334C 2 discloses a suspension system in which wheel-side air springs are also connected to one another in an integrated manner on the axle side, and the connection can likewise be separated by a wheel-side switching valve. In the solution described, however, the storage volume of the axle is connected inseparably to the compressor via a common filling line. Thus, the compressor cannot be utilized to generate a pressure difference by means of the illustrated interconnection with the transverse storage volume.

Therefore, the possible adjustment options of the entire suspension apparatus are limited.

DE 102007060102 a1 discloses a similarly constructed suspension device for a wheeled vehicle. In the specific embodiment described in this document, additional air chambers are present between the respective two air springs of the vehicle axle, which are connected to one another via a connecting line in which a switchable valve is arranged.

Furthermore, an additional gas chamber is connected to the compressor. Thus, when the compressor is operated, the two additional air chambers cannot be loaded independently with pressurized air, so that the possible adjustment options of the suspension device are likewise limited in this case.

Disclosure of Invention

The object of the invention is to provide a suspension device of the type mentioned at the outset which makes it possible to implement a particularly large number of adjustment methods.

According to the invention, this object is achieved for a suspension device of the type described in the introduction in that: the compressor arranged between two transverse plenums is connected by a first connecting line, in which a first switchable valve is arranged, to a first transverse plenum, and by a second connecting line, in which a second switchable valve is arranged.

The design according to the invention makes it possible for the compressor to be pumped directly into the respective transverse air chamber, in particular in such a way that the two transverse air chambers can be loaded independently of one another, so that in this way different pressure levels can be built up in the respective transverse air chamber of the front or rear axle. The desired compensating action can thus be performed if necessary. Thus, for example, the pressure of the front axle from the rear axle can be increased rapidly in a dangerous situation. By the possibility of establishing different pressure levels in the transverse chambers of the two axles, various other adjustment possibilities are also obtained, as will be discussed below.

In the suspension device constructed according to the invention, a transverse air chamber (intermediate volume) is assigned to each vehicle axle. The transverse air chamber is connected directly or via a corresponding pressurized air line to the main air chamber of an air spring, which is arranged in each case at the wheel suspension of the associated wheel. Between the transverse air chambers and the respective main air chambers there are in each case control valves, by means of which the respective connections can be interrupted or opened. The arrangement of such control valves (cross-cuts) is known.

In the solution according to the invention, the possibility of influencing the spring characteristic, the roll characteristic and the pitch characteristic is achieved by the parallel use of corresponding control valves (transverse partitions) and switchable additional volumes (transverse air chambers), wherein only two additional volumes in the form of the transverse air chambers used are used. By means of the arrangement according to the invention, the intermediate volume predefined by the transverse air chamber can be selectively connected to the air spring on the right or left side of the vehicle or to the two air springs on the axle side, or to neither of the two air springs on the axle side.

According to the invention, the transverse air chamber (intermediate volume) is coupled to the air supply of the vehicle, so that a direct filling/direct emptying of the intermediate volume can be achieved. It is therefore particularly advantageous to pump air from the central volume into the air springs in the corners of the vehicle and vice versa. So that the pressure between the air springs of the axle and the associated intermediate volume may differ from each other.

By thus advantageously preselecting the pressure level in the intermediate volume relative to the intrinsic volume of the air spring, a particularly efficient and rapid lifting and lowering of the vehicle is achieved. By arranging the air line and the valve between the compressor and the transverse volume in the way described, the moment of the desired levelness adjustment/height adjustment is separated from the delivery action of the compressor. Thus, without leveling adjustment, the compressor can be used to build up a pressure in the lateral volume with a positive or negative deviation from the pressure of the main volume of the air spring, with the main volume of the air spring being intercepted. The delivery action may occur with little compressor performance and over a period of time generate and store energy stored therein as a pressure differential.

If the intermediate volume is then suddenly reconnected to the natural volume of the air spring by opening the control valve at the air spring, a flow of air from the transverse volume into the main volume of the air spring and vice versa occurs and the respective vehicle axle or corner is lowered particularly quickly or raised particularly quickly. This possibility leads to a very rapid rate of levelness adjustment, since it takes place without a compressor by simply flowing an air quantity from the natural volume of the air spring into the intermediate volume and vice versa.

The transverse air chamber arranged between the two vehicle sides provides a corresponding air storage volume and is connected on both sides via corresponding connecting lines or directly to the two air springs of the vehicle axle, wherein a control valve (switching valve) is arranged between the main air chamber and the transverse air chamber, which control valve is actuatable in order to establish or interrupt the corresponding connection. Thus, the transverse air chamber can be selectively connected to either or both of the air springs on the right side or the left side of the vehicle, or neither of the air springs.

Thus, the transverse air chamber (intermediate volume or transverse volume) acts as an element of transverse partition, thereby making the overall elastic behavior of the associated axle more comfortable.

In a development of the suspension device constructed according to the invention, the suspension device has a storage container assigned to the compressor, and in a particularly preferred embodiment the suspension device is constructed as a closed/closed-loop levelness adjusting device. In this case, it is possible to easily transfer from one transverse volume to another transverse volume in a closed system in order to build up pressure.

An embodiment is characterized in that the first and second connection lines comprise a line connecting the first and second transverse plenums, in which line the two valves are arranged to be switchable, between which the line from the compressor leads. Here, by switching the two valves, the compressor can be charged with one or the other transverse gas chamber, with both transverse gas chambers being charged simultaneously or without being charged at all.

The control valves or switchable valves used are preferably digital valves (two-position valves), by means of which the respective line can be opened or closed in a controlled manner.

Drawings

The invention is explained in detail below with the aid of embodiments with reference to the drawings. Wherein:

fig. 1 shows a schematic illustration of the basic principle of a suspension arrangement;

fig. 2 shows a suspension device embodiment in four different functional stages.

Detailed Description

Fig. 1 shows a basic schematic diagram of a suspension device. The suspension device has a compressor 1 as a pressure air source, which is connected to the main air chambers 2, 3, 4, 5 of the air springs by four lines 12. The respective air springs are each arranged on the wheel suspension of the respective wheel (not shown), wherein the two main air chambers 2, 3 belong to the air spring at the front axle of the respective vehicle and the two main air chambers 4, 5 belong to the air spring at the rear axle.

Between the two main air chambers 2, 3 of the front axle there is a transverse air chamber 13 configured as a storage volume (intermediate volume) which is connected to the two main air chambers 2, 3 by way of respective air lines. Between the main air chambers 2, 3 and the transverse air chamber 13, control valves 6, 7 are provided, respectively, with which the connection between the main air chamber and the transverse air chamber can be opened and closed.

A corresponding construction exists in the rear axle. In this case, a second transverse air chamber 14 is arranged between the two main air chambers 4, 5, which is connected to the main air chambers 4, 5 via a respective air line, wherein the respective control valve 8, 9 opens or closes the air line.

Thus, the two transverse air chambers 13, 14 (intermediate volumes) can be connected selectively with the air springs on the right side of the vehicle or on the left side of the vehicle or with both air springs, or with neither air spring. The advantages already explained above are thus obtained.

Further, the compressor 1 is connected to the first transverse plenum 13 through the first connection line 10, and is connected to the second transverse plenum 14 through the second connection line 11. A first switchable valve 16 is arranged in the first connecting line 10, while a second switchable valve 15 is present in the second connecting line 11. Direct filling/direct emptying of the two transverse gas chambers 13, 14 can thus be achieved, in particular independently of one another. Thus, the transverse air chamber 13 or the transverse air chamber 14 or both transverse air chambers 13, 14 can be filled or emptied together or neither of them, so that different pressure levels can be established in the two transverse air chambers 13, 14.

When using a closed air supply device, it is characterized in that the compressor in the operating mode can only draw air from a channel or reservoir separate from the environment in a technically sealed manner, rather than from the environment, and in particular it is advantageously possible to pump air from the transverse air chamber (intermediate volume) into the respective air spring and vice versa. This achieves that the pressure between the air spring of the axle and the associated intermediate volume can differ from one another.

Other advantages of this solution have already been explained above.

Fig. 2 shows another embodiment of the suspension device in four states. The upper left diagram relates to the adjustment of the rear axle arranged above in the figure, the upper central diagram relates to the inactive state, the upper right diagram relates to the adjustment of the front axle shown above in the figure, and the lower diagram relates to the generation of a pressure difference between the two transverse air chambers 13 and 14.

The two transverse air chambers 13, 14 of the front and rear axles are connected via respective air lines to the main air chambers 2, 3 and 4, 5 of the respective air springs, between which the respective control valves 6, 7 and 8, 9 are arranged. The compressor 1, which is arranged centrally between the two transverse plenums 13, 14, is connected to the respective transverse plenum 13, 14 via the first connection line 10 and via the second connection line 11. The first connection line 10 has a switchable valve 16, and the second connection line 11 has a switchable valve 15. A storage container 17 is assigned to the compressor 1.

The upper left diagram shows the adjustment process of the rear axle, which is shown in the upper part of the diagram. Here, the two control valves 8, 9 are opened, so that an air exchange can take place between the main air chambers 4, 5 and the transverse air chamber 14. The compressor 1 is connected to the transverse gas chamber 14 via the first connecting line 11 with the valve 15 open. In this case, the respective valve for the front axle is closed.

The upper right diagram shows the adjustment process for the front axle shown below in this figure. Here, the valves 16, 6 and 7 are open, while the corresponding valves of the rear axle are closed.

In the middle of the upper row, the inactive state is shown, in which all relevant valves are closed.

The lower diagram of fig. 2 shows the establishment of a pressure difference between the two transverse air chambers 13 and 14. Here, the valves 15, 16 and all the control valves 6, 7 and 8, 9 are closed, while the two valves 20, 21 arranged adjacent to the compressor 1 are open. The transverse gas chambers 13, 14 are acted upon by the respective bypass lines 22, 23, wherein a corresponding pressure difference is generated when one of the valves 20, 21 is closed.