CN113386819B

CN113386819B - Reservoir protection assembly and reservoir for motor vehicle

Info

Publication number: CN113386819B
Application number: CN202010168614.6A
Authority: CN
Inventors: 王海盈; 沈斌
Original assignee: Knorr Bremse Systems for Rail Vehicles Suzhou Co Ltd
Current assignee: Knorr Bremse Systems for Rail Vehicles Suzhou Co Ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2024-03-26
Anticipated expiration: 2040-03-12
Also published as: CN113386819A

Abstract

The invention relates to a reservoir protection assembly (10), wherein the reservoir protection assembly (10) comprises a safety rope (16) which, when the reservoir protection assembly is mounted on the reservoir, encloses the reservoir (1) from below and is fastened at both ends to a base structure (20) of the motor vehicle, and a drain valve protection device which is arranged on the reservoir and serves to protect a drain valve (3) mounted on the reservoir base, and which is passed through a safety rope channel formed in the drain valve protection device. The invention also relates to a wind cylinder comprising the wind cylinder protection assembly.

Description

Reservoir protection assembly and reservoir for motor vehicle

Technical Field

The present invention relates to a reservoir protection assembly and a reservoir for a motor vehicle.

Background

The air cylinder is widely applied to rail vehicles such as high-speed rails, subways, trains and the like as an important component part of an air brake system of the motor vehicle. The air cylinder is used as an energy storage device and can store compressed air, and meanwhile, dry and clean compressed air meeting the specified pressure is provided for the vehicular air equipment so as to ensure safe, reliable and stable normal operation of braking of the vehicle.

The reservoir is usually suspended from the floor structure of the motor vehicle by means of two reservoir slings. These are for example constructed as U-shaped steel strips, which have bolts at their two free ends for connection to the floor structure of the motor vehicle. However, due to the large weight of the reservoir itself and the inertial forces generated during high-speed travel of the motor vehicle, the reservoir strap itself will be subjected to a great load, whereby the screw connection between the reservoir strap and the motor vehicle substructure may come loose or the reservoir strap itself may also break. This can lead to the reservoir falling onto the track, the motor vehicle being unable to run normally, and even causing a rollover accident or other traffic accident in severe cases.

In order to overcome this disadvantage, a steel frame for secondary protection of the reservoir is proposed in the prior art, which is fastened to the vehicle floor and can hold the reservoir from below. When the air cylinder hanging belt fails, the air cylinder falls on and is supported by the steel frame, so that the air cylinder can be prevented from falling on the track to cause serious traffic accidents.

However, this steel frame design has a series of disadvantages of heavy weight, high production cost, large occupied space, and the like. Furthermore, in the event of failure of the reservoir slings, the steel frame can only prevent the reservoir from falling onto the motor vehicle track, but it is not ensured that the reservoir falling onto the steel frame is still working properly and thus that the motor vehicle is running unaffected.

Disclosure of Invention

The object of the present invention is therefore to provide a wind reservoir protection assembly and a wind reservoir equipped with such a wind reservoir protection assembly, which enable secondary protection of the wind reservoir in a simple and reliable manner.

According to one aspect of the invention, the object is achieved by a reservoir guard assembly for a reservoir, comprising a safety rope, which, when the reservoir guard assembly is mounted on the reservoir, encloses the reservoir from below and is fastened at both ends to a base structure of a motor vehicle, and a drain valve guard, which is arranged on the reservoir and serves to protect a drain valve mounted on the reservoir base, the safety rope passing through a safety channel formed in the drain valve guard.

Through setting up the safety rope, when the reservoir suspender became invalid, the safety rope still can reliably fix the reservoir on the vehicle bottom, prevents that the reservoir from dropping and guarantees the normal work of reservoir and motor vehicle. In addition, in practice, water accumulation can occur in the reservoir as the motor vehicle is operated. In order to drain accumulated water periodically, a drain valve should be arranged at the bottom of the air cylinder. Because the drain valve is installed at the lowest point of the air cylinder, the drain valve is relatively close to the track and the ground, and is extremely easy to be hit by flying stones or foreign matters in the running process of the train. It is therefore very important to provide a protection device for the reservoir drain valve. According to the invention, the safety line passes through a safety channel formed in the drain valve protection device, whereby the safety line can be positioned in a fixed position on the reservoir, in particular during failure of the reservoir strap, the safety line does not experience horizontal oscillations in the longitudinal direction of the reservoir, which can cause displacement or tilting of the reservoir. In addition, through this structural scheme, the safety rope not only can play the effect of secondary protection to the reservoir, also can play the effect of secondary protection to drain valve protection device when the connection structure of drain valve protection device and reservoir takes place to loosen or fracture moreover for drain valve protection device still can reliably fix on the reservoir and protect the drain valve from the impact of flying stone or foreign matter. The technical scheme of the invention has the advantages of light weight, low price, small structural space, convenient installation process and safe and reliable functions on the whole.

Further, the drain valve protection device can comprise a protective cover for the drain valve, a support profile extending in the longitudinal direction of the reservoir, and a tie, preferably configured as a clip. The support profile is fastened to the bottom of the air cylinder by means of a tie, and the protective cover is fastened to the support profile by means of a connecting structure. In the prior art, the drain valve protection is usually fastened to the reservoir by means of a reservoir strap. In the present invention, however, the drain valve protection is held on the reservoir by means of a separate fastening element (tie) that is independent of the reservoir strap, so that the drain valve protection can still be reliably fastened to the reservoir in the event of failure of the reservoir strap. Preferably, the safety line channel is defined by a support profile, whereby an extremely simple design of the safety line channel is obtained.

According to one embodiment of the invention, the reservoir protection module has two safety lines, each of which has a vertically downwardly extending fold formed in each end region of the support profile on both longitudinal edges of the support profile. The bending part is formed with a recess which is open downwards, and each safety rope passes through two recesses in the same end region. The two recesses form the safety line channel described above, which is formed in the drain valve protection device. By providing one safety rope in each of the two end regions of the support profile, an optimal support of the safety rope to the support profile and thus the air cylinder can be achieved.

According to one embodiment of the invention, the connecting structure comprises a first tab integrally formed on the protective cover and a second tab integrally formed on the support profile. In this way, both the protective cover and the support profile can be produced from one sheet metal part by means of a stamping process, whereby the production process is simple and the costs are reduced. In addition, the first tab and the second tab are arranged one above the other and are fixed together by means of screwing, riveting, bonding or welding. By the overlapping arrangement of the first tab and the second tab with respect to one another and the additional connection, a secure fixing together of the protective cover and the support profile can be achieved in a simple manner.

Further, the protective cover is arranged near one end of the support profile, at which two folds of the support profile replace the second tab cooperating with the first tab of the protective cover. Thus, only two tabs can be provided per support profile, thereby further reducing the number of components.

Advantageously, the safety line has an adjusting element, such as an adjusting screw, on at least one free end thereof, which is used to adjust the length of the safety line. Advantageously, the length of the safety line is adjusted such that the safety line is pressed against the reservoir from just below. In this case, when the reservoir harness is functioning normally, the safety line is only slightly pressed against the reservoir cylinder and exerts little force on the reservoir cylinder. At this time, only the reservoir sling supports the reservoir, but the safety rope does not support the reservoir, thereby improving the service life of the safety rope. However, when a certain reservoir strap fails, for example, breaks, the safety rope will continue to lift the reservoir in place of the broken reservoir strap, at which point the safety rope will exert a supporting action on the reservoir. This is particularly advantageous when the safety line is constructed as a wire rope. Since the wire rope is pre-tensioned and the wire rope itself is rigid, the wire rope is not substantially stretched further when subjected to an increased load, whereby the transition of the reservoir lifting function from the reservoir sling to the safety rope can be optimally achieved, during which the reservoir is not substantially displaced. Thus, it is ensured that the reservoir still works properly and that the motor vehicle is operating unaffected. In addition, a rubber sleeve may be covered outside the safety rope, thereby preventing a large friction force from being generated between the safety rope and the cylinder block to damage the cylinder.

According to one embodiment of the invention, a reservoir protection assembly is associated with a reservoir, the recess extending up to the transition region between the respective bend and the support profile. Therefore, on one hand, the safety rope can be led out from the concave part of the bending part softly without sudden steering of the safety rope, the service life of the safety rope can be damaged by the sudden steering, and on the other hand, the safety rope led out from the concave part can be ensured to directly act on the cylinder body of the air cylinder without applying vertical pressure to the bending part, so that the bending part cannot be damaged. Further advantageously, a recess is provided in a central position of the transition region. It has proved that the bending part is less prone to be damaged when the recess is arranged in the middle of the transition region than in other positions of the transition region. Thereby, the bent portion can be designed to be minimum in size while satisfying the basic function of reliably holding the safety rope in the X-axis direction and preventing the safety rope from shaking horizontally, thereby reducing the material cost.

Alternatively to the above embodiment, one air reservoir protection assembly may be provided to at least two air reservoirs arranged side by side with each other. Here, each reservoir has a respective drain valve protection, but the reservoirs share the two safety lines. The recesses of the four folds of the at least two air cylinders, which are located on the outside in the lateral direction of the air cylinders, extend all the way into the transition region between these folds and the respective support profile. Therefore, on one hand, the safety rope can be led out from the concave part of the bending part softly without suddenly steering the safety rope, and on the other hand, the safety rope led out from the concave part can be ensured to directly act on the cylinder body without applying vertical pressure to the bending part. Advantageously, the recesses of the remaining folds in the at least two wind cylinders extend into the middle region of the respective fold, which is at the same height as the lowest point of the wind cylinders. In this way it is achieved that the safety line extends horizontally between the lowest points of the cylinders and that little vertical force is applied to the inner folds.

According to one embodiment of the invention, the reservoir has two reservoir straps for supporting the reservoir on the floor structure of the motor vehicle, and the drain valve protection device has two ties. The cylinder body of the reservoir has a longitudinal extension L1, the support profile has a longitudinal extension L2, a horizontal distance D1 between the two reservoir straps and a horizontal distance D2 between the two straps. Advantageously, L1 > D1 > L2 > D2. Gtoreq. 0.5L1. An optimized force distribution of the reservoir guard assembly on the reservoir can thereby be achieved.

The invention also relates to a reservoir for a motor vehicle, in particular a rail vehicle, comprising a reservoir strap for supporting the reservoir on a substructure of the motor vehicle. Here, the reservoir further comprises a reservoir guard assembly according to the invention.

Drawings

The invention is explained in more detail below with the aid of examples with reference to the accompanying drawings.

Fig. 1, 2 and 3 each show a reservoir in a mounted state in perspective from different perspectives, wherein a reservoir guard assembly according to the invention is mounted on the reservoir;

figure 4 shows a perspective view of a reservoir guard assembly according to the present invention;

FIG. 5 shows a partially exploded view of the drain valve protection device of the reservoir protection assembly according to the present invention; and is also provided with

Fig. 6 shows a side view of the reservoir according to the invention in the mounted state.

Detailed Description

Fig. 1, 2 and 3 each show a reservoir 1 in the installed state in perspective from different perspectives. The air cylinders 1 are equipped with an air cylinder protective assembly 10 according to the invention and each air cylinder 1 is mounted on the substructure 20 of a motor vehicle, in particular a rail vehicle such as a high-speed rail, subway or train, by means of two air cylinder slings 2.

To more clearly illustrate the structure of the reservoir shield assembly 10 of the present invention, a Cartesian coordinate system is depicted in FIG. 1 wherein the X-axis represents the longitudinal direction of the reservoir, the Y-axis represents the vertical direction, the Z-axis represents the lateral direction of the reservoir, and the XZ-plane represents the horizontal plane, and the XY-plane represents the longitudinal vertical cross-section of the reservoir. The terms "upper", "lower", "inner", "outer", "bottom" and "side" etc. which are used herein to refer to the relative positional relationship are used with respect to the installed state of the reservoir and reservoir guard assembly.

The reservoir 1 comprises a generally cylindrical cylinder 11 and two end caps 12 (see fig. 2) on either side of the cylinder. Two cylinder straps 2 are provided on the cylinder 11, which are each arranged opposite one another in the region of the cylinder 11 close to the end cap 12 and extend in the vertical direction. The cylinder 11 has a longitudinal extension L1 and has a horizontal distance D1 (see fig. 3) between two vertically extending cylinder slings 2. Here, it is advantageous if L1 > D1. Gtoreq. 0.8L1. The reservoir strap 2 is formed as a U-shaped metal strap, which is fastened with its two free ends to the base structure 20 of the motor vehicle by means of threaded connections, for example bolts, and with its U-shaped inner side at least partially rests on the outer surface of the cylinder 11. Of course, other connection means, such as welding, riveting, etc., may be selected instead of the threaded connection described above.

A drain valve 3 is provided at the bottom of the cylinder body of the reservoir 1 for periodically draining liquid generated inside the cylinder body during operation of the reservoir. To facilitate the discharge of the liquid, the drain valve 3 is usually arranged at the lowest point of the cylinder. This results in the drain valve 3 being relatively close to the rail and the ground, and being extremely vulnerable to flying stones or foreign matter during the running of the motor vehicle. In order to protect the drain valve 3 from flying rocks or accidental opening, a drain valve protection device is provided on the reservoir. The drain valve protection device comprises a protective cover 4 arranged outside the drain valve 3. The protective cover 4 is open on both sides in the Z-axis direction to facilitate inspection, maintenance and operation of the drain valve 3 by a worker, such as a train maintenance person. In addition, an opening is provided on the bottom of the protective cover, which opening is located directly below the drain valve 3 in the installed state of the reservoir protection assembly, for draining liquid flowing out of the drain valve 3 through the protective cover 4.

Fig. 4 illustrates a perspective view of a reservoir guard assembly 10 according to the present invention. For the sake of clarity, the reservoir and the motor vehicle underbody are not shown here. In this embodiment, each reservoir guard assembly 10 is used for secondary protection of two reservoirs disposed parallel to each other at the same time. The reservoir protection assembly 10 thus comprises two drain valve protection devices, each having a protective cap 4, a support profile 5 associated with the protective cap, and two tie-downs 6, which are each arranged in one end region of the support profile 5 and serve to fix the support profile 5, preferably centrally, to the reservoir cylinder, and two safety lines 16 each pass through one end region of the support profile 5 via a safety line channel formed in the drain valve protection device from below the two parallel support profiles 5 and connect the two support profiles 5. Of course, it is also possible that each reservoir guard assembly 10 is used for secondary protection of only one reservoir or for secondary protection of more reservoirs simultaneously. In the case of a reservoir only, the reservoir guard assembly 10 comprises a protective cap 4 and an associated support profile 5, in each case one tie 6 for securing the support profile 5 to the reservoir preferably centrally being provided in each case in the two end regions of the support profile 5, and in each case two safety lines 16 in each case in one end region of the support profile 5 pass through a safety line channel formed in the drain valve guard from below the support profile 5. In the present exemplary embodiment, a protective cap 4, a support profile 5 and two tie-downs 6 together form a drain valve protection, while two drain valve protection and two safety lines 16 together form a reservoir protection module. Of course, this is only exemplary and not restrictive, other combinations of the individual components of the reservoir guard assembly in terms of number are also within the scope of the invention, for example, a drain valve guard having a protective cover 4, a support profile 5 and a tie 6, a drain valve guard having a protective cover 4, a support profile 5 and a plurality of ties 6, a reservoir guard having only one drain valve guard and one safety line, or a reservoir guard having a plurality of drain valve guards and two safety lines, etc.

The structure and connection relationship of the components of the reservoir guard assembly will be described below taking the reservoir guard assembly 10 for secondary guard of two reservoirs at the same time as an example. It is to be noted here that the corresponding matters can also be applied to a reservoir protection assembly for secondary protection of only one or more reservoirs at the same time, as long as this is technically feasible.

Fig. 5 shows an exploded view of the reservoir guard assembly 10, where the tie 6 is not shown. As is clear from fig. 5, each protective cover 4 comprises a base plate 7 and two side plates 8, which in the mounted state of the reservoir each extend perpendicularly to the XY-plane and form a substantially trapezoidal shape with each other. Each side plate 8 is connected at one end to the bottom plate 7 and at the other end to the support profile 5, which support profile 5 in the mounted state rests against the cylinder underside and extends in the longitudinal direction of the reservoir. In addition, the support profile 5 has a recess for allowing the drain valve 3 to pass through and is arranged between two reservoir slings 2 at a distance from the reservoir slings 2. The support profile 5 extends over a large part of the length of the cylinder block, preferably at least two thirds of the length, and has a longitudinal extension L2 (see fig. 3). The support profile 5 is curved in its transverse direction, i.e. in cross section, preferably the curvature of the transverse curvature of the support profile is equal to the curvature of the cylinder outer circumference of the cylinder, whereby a reliable planar abutment of the support profile on the cylinder block is ensured.

Advantageously, each side plate 8 has an additional web 9, which additional web 9 extends vertically and has two first webs 13. The protective cover 4 is firmly connected (for example by screwing, riveting, bonding or welding, etc.) to the second tab 18 of the support profile 5 by means of the first tab 13 of the attachment plate 9. Preferably, the first tab 13 is connected to the second tab 18 of the support profile 5 by riveting or screwing, thereby facilitating the removal of the reservoir guard assembly. In the present embodiment, the tabs 13 and 18 have the same shape, such as a polygonal shape, and are disposed overlapping each other in the connected state. It is particularly advantageous if the base plate 7, the side plate 8, the attachment plate 9 and the first web 13 of a protective cover 4 are integrally formed, and these parts of the protective cover 4 can be obtained by a bending operation on only one sheet metal part. Likewise, the second tab 18 can also be integrally formed on the support profile 5 and can be obtained only by a bending operation of the support profile 5.

In this embodiment, each side plate 8 or additional web 9 has two first webs 13, which are each connected to a respective vertical edge of the additional web 9. It is also conceivable that each additional web 9 is provided with only one first tab which extends in the X-axis direction and has a curved side for abutment against the lower surface of the support profile 5. In this case, the first tab directly rests on the lower surface of the support profile 5 and therefore the second tab integrally formed on the support profile 5 can be dispensed with.

At both ends of the support profile 5, one tie 6 is provided (see, for example, fig. 4), the two ties 6 being arranged vertically in the installed state of the reservoir and having a horizontal distance D2 from one another. Advantageously, L2 > D2. Gtoreq. 0.5L1. In the present exemplary embodiment, the tie 6 is configured as a clip and can tightly enclose the cylinder block in order to firmly clamp the support profile 5 between the tie 6 and the cylinder block 11.

In addition, in each end region of the support profile 5, a respective vertically downwardly extending fold 14 is formed on the longitudinal edge 21 of the support profile, so that a total of four folds 14 are provided on each support profile 5. Advantageously, the outer edge of the fold 14 in the X-axis direction is configured flush with the corresponding end edge of the support profile, whereby the manufacturing process of the support profile 5 can be simplified.

It is also advantageous if the protective cover 4 is arranged near one end side (here the left end side) of the support profile 5 and in this case the two folds 14 of the support profile 5 can serve as second webs 18 which interact with the first webs 13 of the protective cover 4. As is clear from fig. 5, the first tab 13 on the left side of the protective cover 4 is intended to be connected to the left-hand fold 14 of the support profile 5, i.e. in this case the two second tabs 18 on the left side of the support profile 5 are replaced by two folds 14. As a result, only two second webs 18 can be provided per support profile 5, so that the number of components is further reduced.

A recess 15 is formed in each fold 14, which recess opens downward. The safety line 16 extends through recesses 15 in two folds 14 at the same end of the support profile 5, around the cylinder block and is fastened at both free ends to the bottom structure 20 of the motor vehicle. Safety line 16 may be configured as a wire rope. In order to prevent the safety rope from generating larger friction force between the safety rope and the cylinder body of the air cylinder to damage the air cylinder, the safety rope is covered with a rubber sleeve. Furthermore, an adjusting element, for example an adjusting screw, can be provided at the free end of the safety line 16, by means of which the length or the pretensioning force of the safety line can be adjusted. Advantageously, the length or the pretension of the safety line is set such that, in the installed state of the reservoir, the safety line is pressed against the reservoir cylinder and the support profile just (only slightly) from below and exerts little force on them. The safety line does not act as a support for the reservoir at this point, whereby the service life of the safety line can be further increased. When a certain reservoir sling 2 breaks, the safety rope will replace the broken reservoir sling 2 to continue to lift the reservoir without dropping down during this time. This is particularly advantageous when the safety line 16 is configured as a wire rope. Since the wire rope is pre-tensioned and the wire rope itself is rigid, it is substantially not stretched further when subjected to increased loads, whereby the transition of the reservoir support function from the reservoir strap to the safety rope can be optimally achieved, during which the reservoir is substantially not displaced.

In the present embodiment, one air cylinder guard is provided to two air cylinders 1 arranged in parallel. Here, each of the air cylinders 1 has its own drain valve protection device, but the two air cylinders 1 share a pair of safety ropes 16. In this case, each safety line 16 surrounds two air cylinders 1 through four bends 14 (i.e. two bends 14 of the first air cylinder and two bends 14 of the second air cylinder) and is fastened with two free ends to the floor structure 20 of the motor vehicle. Advantageously, the recesses 15 of the two outer folds 14 of the four folds 14 in the Z-axis direction extend all the way into the transition region between the folds 14 and the support profile 5, so that, on the one hand, a gentle extraction of the safety rope 16 from the recesses 15 can be achieved without abrupt steering of the safety rope, which would reduce the service life of the safety rope, and, on the other hand, it can be ensured that the safety rope 16 extracted from the recesses 15 acts directly on the cylinder block without exerting a vertical pressure on the folds 14, thereby without damaging the folds. Further advantageously, the recesses 15 of the two inner folds 14 of the four folds 14 extend into the middle region of the respective fold, which is at the same height as the lowest point of the reservoir. Thus, the safety line 16 extends horizontally between the two inner folds and exerts little vertical force on the inner folds.

In this respect, it is clear from fig. 6 that the safety line 16 is gently led out of the recess 15 at the outer fold 14 and that there is little play between the safety line 16 and the reservoir cylinder. The safety line abuts the reservoir over approximately one quarter of the length, whereas the safety line 16 extends horizontally in the region between the lowest points T of the two reservoirs, at which the recesses of the two inner folds 14 are located, whereby the safety line 16 exerts no vertically upward force on the inner folds 14.

It is further advantageous if the recess 15 is arranged in a central position of the transition region. It has proved that the bending part 14 is less prone to be damaged when the recess 15 is arranged in the middle of the transition region than in other positions in the transition region. Thereby, the bent portion 14 can be designed to be minimum in size while satisfying the basic function of reliably holding the safety rope 16 in the X-axis direction and preventing the safety rope 16 from shaking horizontally, thereby reducing the material cost. Furthermore, the first web 13 of the protective cover 4, which cooperates with the fold 14, can have an upwardly open recess which, together with the recess 15 of the corresponding fold 14, delimits a safety line channel for the passage of a safety line. Of course, the first tab 13 of the protective cap 4 which cooperates with the fold 14 may also be free of upwardly open recesses, in which case the safety line channel for the safety line to pass through in the drain valve protection is formed by the recess 15 of the fold itself.

The above examples illustrate or describe possible embodiments of the invention, wherein it is noted here that various combinations of the individual embodiments with one another are also possible. For example, in the case of a reservoir guard associated with a reservoir 1, each safety line 16 passes through only two folds 14, in which case there are no two folds located inside. Both of these two bending portions 14 of the safety line 16 are constructed as the two bending portions 14 located outside as described above.

Finally, it is pointed out that the cylinder and the cylinder guard assembly parts are not shown to scale and/or enlarged and/or reduced in the drawings in order to facilitate an understanding of the structure of the cylinder guard assembly of the present invention.

List of reference numerals

1. Air cylinder

2. Air cylinder sling

3. Drain valve

4. Protective cover

5. Support section bar

6. Ribbon

7. Bottom plate

8. Side plate

9. Additional connecting plate

10. Air cylinder protection assembly

11. Cylinder body

12. End cap

13. First tab

14. Bending part

15. Concave part

16. Safety rope

18. Second tab

20. Bottom structure

21. Longitudinal edge

L1 longitudinal extension length

D1 Horizontal spacing

L2 longitudinal extension length

D2 Horizontal spacing

Longitudinal direction of X-ray air cylinder

Y vertical direction

Transverse direction of Z air cylinder

T lowest point

Claims

1. Reservoir protection assembly (10), characterized in that the reservoir protection assembly (10) comprises a safety rope (16) which surrounds the reservoir (1) from below and is fastened at both ends to the base structure (20) of the motor vehicle, and a drain valve protection device which is arranged on the reservoir and serves to protect a drain valve (3) mounted at the bottom of the reservoir, which is passed through a safety rope channel formed in the drain valve protection device, which comprises a support profile (5) for a protective cover (4) of the drain valve, when the reservoir is supported on the base structure (20) of the motor vehicle by means of a reservoir strap and the reservoir protection assembly is mounted on the reservoir, the support profile (5) is fastened to the bottom of the air cylinder, the protective cover (4) is fastened to the support profile by means of a connecting structure, the safety line channel is defined by the support profile (5), the support profile (5) extends in the longitudinal direction (X) of the air cylinder, the air cylinder protective assembly has two safety lines (16), a vertically downward extending bend (14) is formed in each end region of the support profile (5) on both longitudinal edges (21) of the support profile, a downward opening recess (15) is formed in the bend (14), each safety line (16) passes through a groove (16) located in the same end region, two recesses (15) forming the safety line channel.

2. Reservoir guard assembly (10) according to claim 1, characterized in that the drain valve guard comprises a tie (6), wherein the support profile (5) is fixed on the reservoir bottom by means of the tie (6).

3. The reservoir guard assembly (10) of claim 2 wherein said band is configured as a clip.

4. A reservoir guard assembly (10) according to claim 2, characterized in that the support profile (5) is centrally fixed on the reservoir bottom by means of a tie (6).

5. A reservoir guard assembly (10) according to any one of claims 1 to 4, characterized in that the connecting structure comprises a first tab (13) integrally formed on the guard and a second tab (18) integrally formed on the support profile, the first and second tabs being arranged overlapping each other and being fixed together by means of screwing, riveting, bonding or welding.

6. A reservoir guard assembly (10) according to claim 5, characterized in that the protective cover (4) is arranged near one end of the support profile (5), at which end two bends (14) of the support profile (5) replace the second tab (18) co-acting with the first tab (13) of the protective cover (4).

7. A reservoir guard assembly (10) according to any one of claims 1 to 4, wherein the safety line (16) has an adjustment element on at least one free end thereof for adjusting the length of the safety line.

8. The reservoir guard assembly (10) of claim 7, wherein said adjustment element is an adjustment bolt.

9. The reservoir guard assembly (10) of claim 7, wherein the length of the safety line is adjusted such that the safety line is pressed against the reservoir (1) from just below.

10. The reservoir guard assembly (10) of claim 7 wherein said safety line is configured as a wire rope.

11. The reservoir guard assembly (10) of claim 7 wherein a rubber sleeve is covered on the outside of the safety line.

12. A reservoir guard assembly (10) according to any one of claims 1 to 4, characterized in that one reservoir guard assembly (10) is provided with one reservoir (1), said recess (15) extending up to the transition region between the respective bend (14) and the support profile (5).

13. The reservoir guard assembly (10) of claim 12, wherein the recess (15) is provided in a mid-position of the transition region.

14. A reservoir guard assembly (10) according to any one of claims 1 to 4, characterized in that one reservoir guard assembly (10) is provided for at least two reservoirs (1) arranged alongside each other, wherein each reservoir (1) has a respective drain valve protection, but the reservoirs share the two safety ropes (16), wherein the recesses of four folds (14) of the at least two reservoirs, which are located outside in the reservoir transverse direction (Z), extend all the way into the transition region between the folds (14) and the respective support profile (5).

15. The reservoir guard assembly (10) of claim 14, wherein the recesses (15) of the remaining bends (14) of the at least two reservoirs extend into an intermediate region of the respective bends that is at the same elevation as the lowest point (T) of the reservoir.

16. A reservoir guard assembly (10) according to any one of claims 2 to 4, characterized in that the reservoir has two reservoir straps (2) for supporting the reservoir (1) on the bottom structure (20) of the motor vehicle, the drain valve guard has two ties (6), the reservoir cylinder (11) has a longitudinal extension L1, the support profile (5) has a longitudinal extension L2, there is a horizontal distance D1 between the two reservoir straps (2), there is a horizontal distance D2 between the two ties (6), wherein L1 > D1 > L2 > D2 > 0.5L1.

17. A reservoir for a motor vehicle, the reservoir comprising a reservoir strap (2) for supporting the reservoir (1) on a bottom structure (20) of the motor vehicle, characterized in that the reservoir further comprises a reservoir guard assembly (10) according to any one of claims 1 to 16.

18. The reservoir of claim 17, wherein the motor vehicle is a rail vehicle.