Vibration plate with one-piece protective cover

Abstract

A vibratory plate compactor for soil compaction is described, comprising an upper mass (1); a lower mass (2) movable relative to the upper mass (1); a vibration exciter (10) for generating vibrations for soil compaction; and a vibration decoupling device (3) arranged between the upper mass (1) and the lower mass (2); wherein the upper mass (1) comprises components selected from the group consisting of a drive for driving the vibration exciter, an energy storage device (23) for the drive, a frequency converter, and electronic components; wherein the lower mass (2) comprises a soil contact plate (9) for introducing the vibrations into the soil to be compacted; wherein the vibration decoupling device (3) has several attachment points to which the upper mass (1) is attached; and wherein the upper mass (1) comprises a one-piece casing (20).wherein the enclosing body (20) at least partially encloses at least some of the components of the upper mass (1); and wherein the enclosing body (20) is attached to the vibration decoupling device (3) at the attachment points.

Description

[0001] The invention relates to a vibratory plate for compacting soil. In particular, the invention also relates to a reversible vibratory plate with a battery and an electric drive.

[0002] Vibratory plates, often also called vibratory plates, are known as soil compaction devices used to compact soil. They typically consist of an upper mass and a lower mass that moves relative to the upper mass. A vibration exciter is mounted on the lower mass, which generates vibrations for soil compaction. A vibration decoupling device, such as rubber buffers, is positioned between the upper and lower masses to isolate the upper mass from the vibrations originating in the lower mass.

[0003] Various concepts are known for driving the vibration exciter. For example, an internal combustion engine can be provided on the upper mass, which drives the vibration exciter located on the lower mass via a belt drive or a hydraulic drive. Electric drives are also increasingly known; these can be arranged on the upper mass or directly on the vibration exciter on the lower mass. For the electric drive, a battery serving as an electrical energy storage device can be provided, particularly on the upper mass. To provide a current suitable for the electric drive, a converter device, e.g., a frequency converter, can be effectively provided between the battery and the electric drive.

[0004] Effective vibration exciters are solutions that use one or more unbalanced shafts set in rotation to generate the desired vibrations. Frequently, vibration exciters with two parallel and counter-rotating unbalanced shafts are employed. By changing the phase relationship of the counter-rotating unbalanced shafts, the resulting force vector, particularly its direction, can be altered. This makes it possible to move the vibratory plate forwards and backwards (reversible vibratory plate).

[0005] The upper mass is decoupled from the lower mass by means of a vibration decoupling device to prevent the strong vibrations generated in the lower mass from acting unhindered on the upper mass. In practice, the vibration decoupling device is often implemented by mounting rubber buffers between the upper and lower masses. In the prior art, the upper mass often has a supporting platform on which the drive components, e.g., an internal combustion engine or a battery, can be mounted. This platform is usually made of cast material or sheet metal.

[0006] The drive components located on the upper body should be protected from dirt and mechanical damage. An additional protective frame can be attached to the upper body for this purpose. The protective frame is typically a welded assembly made of bent semi-finished products and sheet metal, which is surface-coated and usually includes additional sheet metal or plastic components. The protective frame also allows the entire machine to be lifted using a crane eye. Furthermore, the protective frame provides access to the drive components via openings, for example, for refueling, checking the oil level, or replacing the battery. Finally, the protective frame also gives the machine an attractive appearance.

[0007] Such a vibrating plate is known from EP 3 862 487 A1. Fig. Figure 1 shows an example from this preprint.

[0008] The in Fig. The vibrating plate shown in Figure 1 has an upper mass 1 and a lower mass 2 that is movable relative to the upper mass 1. The lower mass 2 is coupled to the upper mass 1 via rubber buffers 3, which serve as vibration decoupling devices. In this way, the strong vibrations generated at the lower mass 2 are only transmitted to the upper mass 1 in a damped form.

[0009] The upper mass 1 has a platform or support frame 4 on which a battery 5 and a converter 6 are mounted, which are also considered part of the upper mass 1. The battery 5 and the converter 6 are enclosed by a protective frame 7.

[0010] The battery 5 is replaceable and can be replaced with another battery if necessary. For this purpose, a connector is provided on the converter 6 or on the converter housing belonging to the converter 6, into which the battery 5 can be plugged.

[0011] The sub-mass 2 has a ground contact plate 9, which can be used to compact the soil underneath. A vibration exciter or unbalance exciter 10, also belonging to the sub-mass 2, is arranged on the upper side of the ground contact plate 9.

[0012] In the prior art, such unbalance exciters are usually driven by motors, especially internal combustion engines, which are arranged on the upper mass. In the case of the vibrating plate in Fig. However, 1 is an electric motor (not shown) integrated directly into the unbalance exciter 10, i.e., located on the lower mass.

[0013] To guide the vibratory plate, a guide drawbar 11 is attached to the upper mass 2 or the support frame 4.

[0014] Fig. Figure 2 shows another example known from DE 10 2020 111 123 A1. Functionally identical components as in the vibration plate of Fig. Items 1 are marked with the same reference symbol.

[0015] This vibratory plate also features a protective frame 7, which consists of two curved tubes mounted on the support frame 4 of the upper mass 1. The two curved tubes can be braced against each other by one or more crossbeams (not shown). The protective frame 7 encloses a cover 13, beneath which drive components are concealed.

[0016] The various designs and variations of protective frames and covers used in current technology are expensive to manufacture. Their welded assembly creates a fragmented, jagged appearance, hindering an aesthetically pleasing look. Furthermore, numerous components must be bolted to the standard upper platform, requiring machining of the domes and thus potentially increasing manufacturing costs.

[0017] The invention is based on the objective of providing a vibration plate with an improved protective cover that offers effective protection of the components of the upper mass against mechanical impact and contamination, while on the other hand allowing for high functional integration and cost-effective manufacturability.

[0018] The problem is solved by a vibrating plate having the features of claim 1. Advantageous embodiments are specified in the dependent claims.

[0019] A vibratory plate compactor for soil compaction is described, comprising an upper mass; a lower mass movable relative to the upper mass; a vibration exciter provided on the lower mass for generating vibrations for soil compaction; and a vibration decoupling device arranged between the upper mass and the lower mass; wherein the upper mass comprises components selected from the group consisting of a drive for driving the vibration exciter, an energy storage device for the drive, a frequency converter, and electronic components; wherein the lower mass comprises a ground contact plate for transmitting the vibrations into the soil to be compacted; wherein the vibration decoupling device comprises several attachment points to which the upper mass is attached; wherein the upper mass comprises a one-piece enclosing body; wherein the enclosing body at least partially encloses at least some of the components of the upper mass.wherein the casing is attached to the lower mass; and wherein the vibration decoupling device is arranged in the force flow between the casing and the lower mass.

[0020] The outer shell can be attached to the vibration isolation device at the mounting points. Alternatively, an intermediate element belonging to the outer shell, e.g., a support platform, can be provided, which is attached to the mounting points of the vibration isolation device and which supports the outer shell.

[0021] As a vibration decoupling device, rubber buffers can be used in a known manner, each providing a mounting point to which corresponding connection points of the upper mass can be attached to the lower mass. For example, the vibration decoupling device can have four rubber buffers positioned at the four corners of the lower mass, providing the mounting points to which the outer shell of the upper mass is attached. The rubber buffers can each be attached to the corresponding mounting points of the lower and upper masses, in particular by screwing them in place.

[0022] In one variant, the intermediate element (e.g. the support platform) can be attached to the rubber buffers, while the outer shell is attached to the intermediate element.

[0023] In these variants, the vibration decoupling device (e.g., the rubber buffers) is arranged in the force flow between the outer body and the lower mass.

[0024] An electric battery can be used as the energy storage device if the vibration exciter is driven by an electric motor. Alternatively, the energy storage device can also be a fuel tank if an internal combustion engine is used as the drive system.

[0025] The battery can be replaceable or permanently installed. If the battery is replaceable, a battery compartment may be provided into which the battery can be inserted from the top surface.

[0026] Especially with an electric drive, there is the option of arranging it either on the upper mass or alternatively on the lower mass, directly on or near the vibration exciter.

[0027] An essential component of the invention is the one-piece casing, which forms a kind of protective cover on the upper mass. It can be designed as a single part, in particular as a casting, to which all relevant components of the upper mass can be attached, namely, for example, the drive (electric motor or combustion engine), the energy storage device, a frequency converter, or electronic components.

[0028] The casing can be designed like a protective shell, enclosing the individual components like a dome or a turtle shell. The components are arranged inside the casing to ensure its protective function is effective.

[0029] The outer shell can have corner areas and wall sections in between. The outer shell can have a dome-like structure so that it can be placed over and cover the components.

[0030] The casing body can preferably be a one-piece casting, with optionally machining of connection surfaces for further components.

[0031] The outer casing, acting as a robust shell, can enclose the components of the upper mass. It can be mounted on, for example, the four rubber buffers (main buffers) of the vibration decoupling device and bolted to them. The casing can be manufactured as a machined, painted casting.

[0032] The outer shell can enclose a cavity in which the components of the outer mass are arranged. The cavity forms a spanned space that can approximate a cuboid or a prism. The components of the outer mass are protected within this space.

[0033] The enclosing body can satisfy at least one of the following conditions: - The height of the enclosing body is at least 30%, in particular at least 40%, in particular at least 50%, in particular at least 60% of the maximum length of the enclosing body; - The height of the enclosing body is at most 70% of the maximum length of the enclosing body; - The height of the enclosing body is at least 50%, in particular at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 100% of the maximum width of the enclosing body.

[0034] In this context, height is understood to mean the maximum height, i.e., the vertical distance between the lowest and highest points of the enclosure body in its installed state.

[0035] The housing body can have a drawbar connection for attaching a guide drawbar. This drawbar connection can be designed to accommodate a so-called drawbar bracket, which then supports the actual guide drawbar, allowing it to pivot relative to the bracket. Alternatively, the drawbar bracket can be integrated directly into the housing body and thus serve as the drawbar connection. In this case, the guide drawbar can be pivotally attached directly to the housing body.

[0036] A support platform can be attached to the underside of the housing to hold a battery that serves as an energy storage device for the drive system. For example, a solid support plate can be screwed to the inside of the housing from below, serving as a platform onto which the battery mount and, if necessary, an optional air duct can be screwed. This also provides a cost-effective mounting option for the frequency converter and other electronic components, which are protected from above by the housing. From below, the support platform protects against, for example, dirt from below.

[0037] In one embodiment, the support platform can have at least two levels, one of which can be a higher level at a greater height where the support platform is connected to the housing, and the other level at a lower height where the battery can be located. The support platform can accordingly have a recess, designed, for example, to be positioned between two vibration exciters or unbalanced shafts provided on the underbody. This allows the battery to be placed very low in this recess of the support platform, resulting in an overall low profile for the vibratory plate. Consequently, the vibratory plate can be designed to be very flat compared to conventional vibratory plates.

[0038] The support platform can be attached to the underside of the housing and supported by it. The support platform can, in turn, support, for example, the battery. The housing can itself be supported at the mounting points of the vibration isolation device.

[0039] In one variant, the support platform can be carried at the attachment points of the vibration decoupling device, while the enclosure body is attached to and supported by the support platform.

[0040] At least one battery opening can be provided on the upper side of the casing for removing or inserting a battery serving as an energy storage device. The battery can then be housed within the space enclosed by the casing, e.g., in a battery holder. To remove or replace the battery, it can be accessed from the upper side of the casing via the battery opening.

[0041] The battery opening can be covered by an elastic cover. This elastic cover can be made of an elastomer, for example. It can be designed as an elastic flap, attached to the housing on one side and resting loosely on the other. The cover's own weight alone can ensure sufficient contact with the top of the housing and keep it reliably in place, even during vibration of the plate compactor.

[0042] The cover may have ribbing on its underside facing the enclosing chamber of the enclosing body. In particular, the cover may have ribbing on its underside facing the inside of the enclosing body to prevent sagging. The ribbing thus stabilizes and stiffens the cover.

[0043] The ribbing on the cover can be designed in such a way that, when the device is ready for operation (i.e., with a battery installed), it rests on the battery. As explained above, the battery can be either permanently installed or replaceable and inserted into a battery holder. The elastic cover, with its ribbing, can rest directly on the battery and is thus securely fixed.

[0044] The ribbing can have at least two ribs on the underside of the cover, with the distance between the two ribs being dimensioned such that the space between them is sufficient to accommodate a carrying handle for the battery. For use in a vibration plate, the battery must have a sufficiently high capacity. Accordingly, it is unavoidable that the battery has a considerable weight. To make it easier to handle, it is known to provide a carrying handle on the top of the battery, allowing for convenient carrying. With a suitable design of the ribbing on the elastic cover, the battery's carrying handle can be positioned precisely between the two ribs of the ribbing. This further secures the battery in its position and supports the elastic cover on the top of the battery. Of course, additional ribs can be incorporated into the ribbing beyond the two mentioned above.

[0045] In addition to the battery opening, one or more openings may be provided on the top of the casing, which can be covered in a similar manner by an elastic cover.

[0046] A lifting eye can be provided on the housing. The lifting eye can be located, in particular, on the top of the housing. The lifting eye can be formed integrally with the housing. Alternatively, the lifting eye can be a separate component attached to the housing. In particular, the lifting eye can also be pivotally attached to the housing as a separate component, so that it is only raised when needed. When the lifting eye is not required, it can be pivoted into a resting position.

[0047] It may be useful to provide reinforcement in the area of ​​the crane eye or in the area of ​​the attachment of the crane eye to the housing body on the underside of the connection of the crane eye, e.g. with reinforced ribs.

[0048] A lashing device may be provided on the outside of the housing. This lashing device may, for example, have several, in particular four, lashing eyes located at the four corners of the housing. The lashing eyes may be integrated directly into the housing, i.e., be an integral part of the housing itself. Thus, the lashing eyes are not additional components provided separately from the housing. The lashing eyes may be positioned on the housing in such a way that they are covered by the elastic cover of the battery opening during normal operation of the vibratory plate.

[0049] The casing may have at least one cooling air opening for the passage of cooling air. This opening may serve as either a cooling air inlet or an outlet. The cooling air may be directed, in particular, into the interior beneath the casing to cool components such as the battery, frequency converter, or drive unit.

[0050] The casing body constitutes a large part of the mass of the upper mass. If the casing body is designed as a casting, there is a simple way to influence the machine's center of gravity, i.e., the center of gravity of the entire vibratory plate, during the design phase by shaping the casting accordingly.

[0051] The mold body with its openings can be designed in such a way that it can be vertically formed and demolded during manufacturing. The mold then requires no additional cores. Undercuts are avoided.

[0052] These and other advantages and features of the invention are explained in more detail below using examples and the accompanying figures. They show: Fig. 1 a vibration plate according to the state of the art; Fig. 2 another example of a vibration plate according to the state of the art; Fig. 3 a vibration plate according to the invention; Fig. 4 the vibration plate from Fig. 3 in cutaway side view; Fig. 5 a close-up of a section Fig. 4; Fig. 6. The vibrating plate in an oblique top view, with the covers removed; Fig. 7 a shell body in perspective view from the front; Fig. 8 the enclosing body in perspective view from behind; Fig. 9 a variant of the vibration plate with a two-stage support platform; and Fig. 10 an interior area of ​​the upper mass with the outer shell removed.

[0053] Fig. Figure 3 shows an example of a vibration plate according to the invention. Insofar as components perform similar or identical functions to those described above, the following applies: Fig. 1 and Fig. The same reference numerals are used for the two vibration plates described in the section on the state of the art. Some of these components are not described again.

[0054] Accordingly, the vibration plate according to the invention also has an upper mass 1 and a lower mass 2. The lower mass 2 is coupled to the upper mass 1 at a total of four corners via rubber buffers 3, which serve as vibration decoupling devices.

[0055] An unbalance exciter 10, serving as a vibration exciter, is provided on the lower mass 2. In the example shown, the unbalance exciter 10 is a twin-shaft exciter with two counter-rotating unbalance shafts (not shown) which are set in rotation by an electric motor (not shown) to generate vibrations for soil compaction.

[0056] An essential component of the upper mass 1 according to the invention is a shell body 20, which surrounds the sensitive components of the upper mass 1 and is attached to the rubber buffers 3 at the four corner points. Unlike the prior art, the upper mass 1 thus does not have a welded or tubular construction as a protective frame, but rather a solid protective shell body 20.

[0057] At the in Fig. In the variant shown, the outer body 20 is attached directly to the rubber buffers 3. In a variant not shown, an intermediate element, e.g., a support platform (explained later), may be provided, which is attached to the rubber buffers 3 and in turn supports the outer body 20.

[0058] The outer shell 20 has corner areas and flat wall sections arranged between them, which give the outer shell 20 an attractive appearance. The outer shell 20 is manufactured as a cast part and thus represents an effective mass for stabilizing the upper mass 1 in order to compensate for the strong vibrations at the lower mass 2.

[0059] An elastomeric cover 21 is attached to the upper mass 1, which, similar to a heavy cloth or rag, covers openings on the upper side of the shell body 20. The elastomeric cover 21 is particularly prominent in the front area (in Fig. 3 left side) and in the rear area on the side of the housing body 20 facing the guide drawbar 11, it can be lifted or folded up. The elastomer cover 21 can cover the entire top of the housing body 20 as a single unit. However, it can also be implemented as several individual, separate covers.

[0060] Fig. 4 shows the vibration plate from Fig. 3 in lateral sectional view. Fig. Figure 5 shows a close-up of a section. Fig. 4.

[0061] Fig. Figure 6 shows the vibrating plate in an oblique top view, with the elastomer cover 21 removed. Accordingly, in Fig. 6 two openings 22 are recognizable, which are in Fig. 3 are covered by the elastomer cover 21.

[0062] In the Fig. Figures 4 to 6 show two batteries 23, which can be inserted into corresponding battery holders on the upper mass 1 and serve to supply the electric motor (not shown) with electrical energy as a drive for the unbalance exciter 10. The batteries 23 can be removed upwards through the two openings 22. For this purpose, a handle 24 is provided on the top of each battery 23, which allows the battery 23 to be easily grasped and lifted.

[0063] Fig. 5 as an enlargement of Fig. Figure 4 shows that several ribs 25 are provided on the underside of the elastomer cover 21 to reinforce and stiffen the elastomer cover 21. The ribs 25 serve to prevent the elastic elastomer cover 21 from sagging under its own weight, but rather to ensure that it has a certain stiffness.

[0064] Furthermore, some of the ribs 25 are dimensioned with respect to their height such that they bear against the upper surface of the respective battery 23 inserted below. In this way, a positive-locking support of the elastomer cover 21 on the respective battery 23 is achieved.

[0065] Furthermore, two of the ribs 25 have a distance from each other that is dimensioned such that the handle 24 of the battery 23 fits between them ( Fig. 5) This can also achieve a stiffening and stabilization of the elastomer cover 21.

[0066] A lifting eye 26 is arranged on the upper side of the casing body and is pivotably mounted on a lifting eye bracket 27. The lifting eye bracket 27 can be part of the casing body 20, i.e., formed integrally with it.

[0067] How Fig. Figure 4 shows that a support platform 32 is inserted and attached from below to the underside of the casing body 20, on which further components can be mounted that are to be protected by the casing body 20.

[0068] In the Fig. In the example shown in Figure 4, the support platform 32 is supported by the shell body 20. In a variant not shown, it is possible that the support platform 32 provided below the shell body 20 is attached to the rubber buffers 3 and in turn supports the shell body 20.

[0069] The Fig. 7 and Fig. Figure 8 shows the envelope body 20 from the front ( Fig. 7) and from behind ( Fig. 8).

[0070] It can be seen that the casing 20 forms a protective shell, similar to a turtle shell, enclosing an interior space (enclosure) in which components of the vibration plate, in particular the batteries 23, but also other electronic components and, for example, a frequency converter are housed.

[0071] In addition, the crane eye bracket 27 is formed on the upper side as part of the casing body 20, which is designed as a cast part.

[0072] Furthermore, two lashing rings 28 are provided on each of the two end faces, for a total of four. These are covered by the elastomer cover 21 in the normal operating state. By lifting the elastomer cover 21, the four lashing rings 28 are exposed, allowing suitable lashing straps to be threaded through them to secure the vibratory plate for transport. The lashing rings 28 are located on the top of the housing 20 and are therefore higher than most side walls of loading platforms. To access the lashing rings 28, the ends of the elastomer cover 21 must be slightly lifted.

[0073] In the rear area – viewed in the direction of travel – the casing body 20 has a drawbar connection 29 in the form of suitable mounting surfaces. A drawbar bracket 30 can be screwed onto this, which supports the guide drawbar 11 in a manner known per se (cf. Fig. 3 and Fig. 4).

[0074] The casing 20 has at least one cooling air opening 31 ( Fig. 8) designed to allow cooling air to enter the interior of the casing body 20 in order to cool the electronic components provided there.

[0075] Fig. Figure 9 shows a variant of the vibration plate from Fig. 3.

[0076] A support platform 33 is attached to the underside of the casing body 20. The support platform 33 in Fig. 9 differs from the one in Fig. The support platform 32 shown in Figure 4 is characterized by its two-stage or two-level design. An upper level 34 serves to attach the support platform 33 to the housing 20 from below. A lower level 35, located at a lower height, forms a recess in which the battery 23 and other components are accommodated. The support platform 33 is thus "bulged out" downwards to lower the battery 23. This allows the overall design of the vibratory plate to be modified and, in particular, its overall height to be reduced.

[0077] Instead of a single imbalance agent 10 ( Fig. 4) are in the variant of Fig. 9 Two unbalanced exciters 36 are provided as vibration exciters. These can in particular be single-shaft exciters arranged at a distance from each other to allow an intermediate or free space for the lower level 35 of the support platform 33.

[0078] With this variant, a significantly lower profile can be achieved compared to the vibration plate from Fig. 3.

[0079] Fig. Figure 10 shows an interior view of the components in the enclosing space under the enclosing body 20, with the two batteries 23 and other electronic components. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 3 862 487 A1

[0007] DE 10 2020 111 123 A1

[0014]

Claims

[1] Vibrating plate for compacting soil, with - of a superior mass (1); - a lower mass (2) that is movable relative to the upper mass (1); - a vibration exciter (10) for generating vibrations for soil compaction; and with - a vibration decoupling device (3) arranged between the upper mass (1) and the lower mass (2); wherein - the upper mass (1) comprises components selected from the group drive for driving the vibration exciter, energy storage (23) for the drive, frequency converter, electronic components; - the sub-mass (2) has a ground contact plate (9) for introducing the vibrations into the soil to be compacted; - the vibration decoupling device (3) has several attachment points to which the upper mass (1) is attached; - the upper mass (1) has a one-piece shell body (20); - the enclosing body (20) at least partially encloses at least some of the components of the supermass (1); - the shell body (20) is attached to the submass (2); and wherein - the vibration decoupling device (3) is arranged in the force flow between the outer body (20) and the lower mass (2). [2] Vibration plate according to claim 1, wherein the casing (20) is attached to the vibration decoupling device (3) at the attachment points. [3] Vibration plate according to one of the preceding claims, wherein the outer body (20) encloses an outer space in which the components of the upper mass (1) are arranged. [4] Vibration plate according to one of the preceding claims, wherein the enclosing body (20) satisfies at least one of the following conditions: - the height of the enclosing body (20) is at least 30%, in particular at least 40%, in particular at least 50%, in particular at least 60% of the maximum length of the enclosing body (20); - the height of the enclosing body is at most 70% of the maximum length of the enclosing body (20); - the height of the enclosing body (20) is at least 50%, in particular at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 100% of the maximum width of the enclosing body (20). [5] Vibration plate according to one of the preceding claims, wherein the casing body (20) has a drawbar connection (29) for attaching a guide drawbar (11). [6] Vibration plate according to one of the preceding claims, wherein a support platform (32, 33) is attached to an underside of the casing body (20) for carrying a battery (23) serving as an energy storage device for the drive. [7] Vibration plate according to one of the preceding claims, wherein - the support platform (33) has at least two levels (34, 35); - one of the levels is a higher level (34) at a higher level, where the support platform (33) is connected to the shell body (20); and wherein - the other of the levels is a deeper level (35) at a lower level, on which the battery (23) is located. [8] Vibration plate according to one of the preceding claims, wherein at least one battery opening (22) is provided on a top side of the casing body (20) for removing a battery (23) serving as an energy storage device. [9] Vibration plate according to claim 8, wherein the battery opening (22) can be covered by an elastic cover (21). [10] Vibration plate according to one of the preceding claims, wherein the cover (21) has a ribbing (25) on its underside facing the enclosing space of the enclosing body (20). [11] Vibration plate according to one of the preceding claims, wherein the ribbing (25) is designed such that it rests on the battery (23) when in the ready-to-use state with a built-in battery (23). [12] Vibration plate according to one of the preceding claims, wherein - the ribbing has at least two ribs (25) on the underside of the cover (21); and wherein - the distance between the two ribs (25) is dimensioned such that the space formed between them is sufficient to accommodate a carrying handle (24) of the battery (23). [13] Vibration plate according to one of the preceding claims, wherein a lifting eye (26) is provided on the casing body (20). [14] Vibration plate according to one of the preceding claims, wherein a lashing device (28) is provided on the outside of the casing body (20). [15] Vibration plate according to one of the preceding claims, wherein at least one cooling air opening (31) is provided in the casing (20) for the passage of cooling air.

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