CN217320317U - Backing plate and engineering machinery - Google Patents

Abstract

The utility model provides a backing plate and engineering machine tool. The base plate comprises a plurality of modules and a locking connection mechanism, wherein the modules have a first combination state and a second combination state, the first combination state is sequentially distributed in at least one direction in a first plane, the second combination state is stacked along the first direction to form a multilayer structure, and the first direction is perpendicular to the first plane; the locking connection mechanism is used for being respectively connected with the modules in the first combination state and the modules in different layers in the second combination state so as to keep the relative positions of the modules locked. The utility model discloses a backing plate can adapt to diversified bearing demand, is convenient for still realize the whole transportation of a plurality of modules, extensive applicability, and the practicality is strong.

Description

Backing plate and engineering machinery

Technical Field

The utility model relates to a mechanical equipment technical field particularly, relates to a backing plate and engineering machine tool.

Background

In some instances, it is desirable to use a skid plate to carry or transfer loads, thereby ensuring the stability of the device carried by the skid plate. For example, during the operation of a crane, the support legs are often required to be supported on the ground due to tonnage or stability requirements, but due to the complex situations of uneven ground, softened ground and the like existing in a construction site, the support of the support legs needs to be realized by the aid of the backing plates.

However, the backing plate has certain requirements on the coverage area or thickness, the transportation is inconvenient, and in some technologies, backing plates with different specifications are required to be equipped according to the size of the load, so that the production or application of the backing plate is inconvenient, and the applicability is weak.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the problem that how to improve the backing plate suitability of correlation technique to a certain extent.

To solve at least one aspect of the above problems at least to some extent, in a first aspect, the present invention provides a tie plate comprising a plurality of modules and a locking connection mechanism, wherein the plurality of modules have a first combination state sequentially distributed along at least one direction in a first plane, and a second combination state stacked along the first direction to form a multi-layer structure, and the first direction is perpendicular to the first plane; the locking connection mechanism is used for being respectively connected with the modules in the first combination state and the modules in different layers in the second combination state so as to keep the relative positions of the modules locked.

Like this, set up the relatively great backing plate of area under the tiling state into including a plurality of modules, when specifically using, thereby can increase and decrease the quantity of module and the combination state of adjustment module as required and satisfy the bearing user demand of backing plate, for example, when the load-bearing surface of needs increase backing plate, can increase the quantity of module in the first plane to keep the relative position locking (being first combination state) of each module through locking coupling mechanism, and be convenient for realize the whole transportation of a plurality of modules under the second combination state. In addition, the plurality of modules can also be used as a bearing structure in a second combination state, and the number of the modules in the first direction can be adjusted according to needs, so that the overall rigidity and the thickness of the cushion plate in the second combination state are adjusted. The utility model discloses a backing plate can adapt to diversified bearing demand, the transportation of the single module of being convenient for and a plurality of module, extensive applicability, the practicality is strong.

Optionally, a plurality of modules are arranged in at least one layer of the multilayer structure, each module in the same layer is connected through the locking connection mechanism, and at least one module in the same layer is connected with the modules in other layers through the locking connection mechanism.

Therefore, in the second combination state, all the modules in the same layer are connected through the locking connection structure, and when the number of the modules in the same layer is increased or reduced, the relative positions of all the modules in the same layer can be ensured to be locked, so that all the modules in the same layer are connected into a whole; and at least one module in the same layer is connected with the modules positioned on other layers through the locking connection structure, so that the stability of the overall structure of the multilayer structure can be ensured, the number of layers of the multilayer structure can be increased or decreased and/or the number of modules in the same layer can be increased or decreased according to actual bearing or transportation requirements, the reliability is high, and the practicability is high.

Optionally, the locking connection mechanism includes a connection member located at one side of the modules in a direction perpendicular to the first direction, the connection member being configured to be connected to the plurality of modules, respectively.

In this manner, the operation of connecting or disconnecting between the modules and the connector can be performed in the direction perpendicular to the first direction, facilitating the relative position locking between the modules to be quickly achieved from the outside through the connector.

Optionally, all be equipped with on the module be used for with the connecting portion that the connecting piece is connected, connecting portion are spacing post, the connecting piece is the limiting plate, be provided with spacing hole on the limiting plate, spacing hole is used for the cover to locate spacing post, be provided with limit structure on the spacing post, limit structure is used for the restriction the limiting plate breaks away from spacing post.

So, be convenient for from the outside through spacing hole on the limiting plate and module on spacing post be connected realize the reliable connection of limiting plate and module, limit structure can ensure the reliability of limiting plate and module connection, reliability and stability through limiting plate connection between the module are high.

Optionally, the module is provided with a connecting portion for connecting with the connecting member, in a first combination state, the distance between two adjacent connecting portions of the module that are different is a first distance, in a second combination state, the distance between at least two connecting portions of the module that are different is a second distance, and the second distance is equal to the first distance.

So, when needs, the connecting piece is used for the interface of being connected with two connecting portion under the first composite state, can directly be used for being connected with the connecting portion of different modules under the second composite state, and needn't add other interfaces on the connecting piece, simple structure, the practicality is strong.

Optionally, the module further comprises a plug connection structure, the plug connection structure comprises a slot and a plug block which are mutually plugged, and under the first combination state and the second combination state, any adjacent module is respectively provided with the slot and the plug block.

Thus, adjacent modules can be limited by the plug connection structure, for example, relative movement along the first direction, the plug connection structure can improve the stability of connection of the modules to a certain extent, and structural limitation on the locking connection mechanism can also be reduced to a certain extent.

Optionally, the slot and the insertion block are respectively arranged at two ends of the module.

So, the structural uniformity of each module is high, is favorable to reducing the material kind of backing plate, and the practicality is strong.

Optionally, in any direction perpendicular to the plugging direction of the slot, the inner wall of the slot is disposed close to the edge of the module.

Therefore, the cross sectional area of the plug connection structure in the plane perpendicular to the plug direction can be increased, the connection stability of the adjacent modules in the plane is enhanced, and the reliability is high.

Optionally, a convex block is arranged on the inner wall of the slot, a groove corresponding to the convex block is arranged on the insertion block, and the convex block is in insertion fit with the corresponding groove.

So, set up lug and recess, can increase slot and inserted block plug connection's area of contact, reinforcing force stability can also strengthen the structural rigidity of slot in lug department to a certain extent.

In a second aspect, the present invention provides an engineering machine, which comprises a leg plate, wherein the leg plate is the above first aspect.

The construction machine has all the advantages of the base plate, and the detailed description is omitted here.

Drawings

Fig. 1 is a schematic structural view of a cushion plate in a first assembled state according to an embodiment of the present invention;

FIG. 2 is a schematic view of the mat of FIG. 1 in a second assembled state;

fig. 3 is a schematic structural view of another embodiment of the present invention, wherein the backing plate is in a second assembled state;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic structural view of another embodiment of the present invention, wherein the backing plate is in a second assembled state.

Description of reference numerals:

1-module, 11-first module, 12-second module, 13-third module, 14-fourth module, 2-connecting piece, 21-first connecting piece, 211-connecting piece, 22-second connecting piece, 23-third connecting piece, 3-inserting block, 31-groove, 4-limiting structure, L1-first distance, L2-second distance, and L3-third distance.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the terms "an embodiment," "one embodiment," "some embodiments," "exemplary" and "one embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In the drawings, the Z-axis represents the vertical, i.e., up-down, position, and the positive direction of the Z-axis (i.e., the arrow of the Z-axis points) represents up, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) represents down; in the drawings, the X-axis represents the horizontal direction and is designated as the left-right position, and the positive direction of the X-axis (i.e., the arrow direction of the X-axis) represents the right side, and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) represents the left side; in the drawings, the Y-axis indicates the front-rear position, and the positive direction of the Y-axis (i.e., the arrow direction of the Y-axis) indicates the front side, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) indicates the rear side; it should also be noted that the foregoing Z-axis, Y-axis, and X-axis representations are merely intended to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

As shown in fig. 1 and 2, an embodiment of the present invention provides a pad plate, which can be used as a leg pad of an engineering machine, for example. And can be used in various similar occasions needing bearing.

The base plate comprises a plurality of modules 1 and a locking connection mechanism, wherein the modules 1 have a first combination state and a second combination state, the first combination state is sequentially distributed in at least one direction in a first plane, the second combination state is stacked along the first direction to form a multilayer structure, and the first direction is vertical to the first plane;

the locking connection mechanism is used for being respectively connected with the modules 1 in the first combination state and respectively connected with the modules 1 which are positioned at different layers in the second combination state so as to keep the relative positions of the modules 1 locked.

The specific structural form of the locking connection mechanism is not limited, and it is sufficient that the locking of the relative position of each module 1 can be achieved in both the first combination state and the second combination state, the manner of locking the relative position of each module 1 by the locking connection mechanism may be direct connection locking or indirect limit locking, the locking manner may be adaptively changed according to the number of modules 1 or the change of the structure, and it is not limited, for example, the locking connection mechanism may achieve the locking of the relative position of each module 1 by a flexible connection manner such as a pulling rope, or achieve the locking of the relative position of each module 1 by a rigid connection manner such as a connecting member 2 described later. Further, the lock connection mechanism may be the same or different between the first combination state and the second combination state, and for example, in the first combination state, the pulling rope is wound around each module 1, and the relative position of each module is locked by the abutting force between the modules 1, and in the second combination state, the pulling rope is wound around each module 1, and the relative position of each module is locked. For example, in the embodiments described later, the connecting members 2 may be respectively connected to the modules 1 in the first direction, or may be respectively connected to different modules in other directions, or a part of the connecting members 2 may be used for connecting to the modules 1 in the first combination state, or may be used for connecting to the modules 1 in the second combination state, which will be described later by way of example.

It should be noted that, in the present application, the plurality of modules 1 are sequentially distributed along the second direction (for example, the X-axis direction in the figure) in the first plane in the first combination state as an example to illustrate the content of the present invention, but it should be understood that the plurality of modules 1 may be sequentially distributed in the second direction and the third direction (for example, the Y-axis direction in the figure), that is, distributed in an array in the first plane, respectively, without departing from the design concept of the present invention. Here, the first plane is not limited to an absolute plane, and will not be described in detail later.

Therefore, the base plate with a relatively large floor area in a tiled state is set to comprise the modules 1, when the base plate is used specifically, the number of the modules 1 and the combination state of the modules 1 can be increased or decreased according to needs so as to meet the bearing and use requirements of the base plate, for example, when the bearing surface of the base plate needs to be increased, the number of the modules 1 in a first plane can be increased, the relative position of each module 1 is kept to be locked (namely, a first combination state) through the locking and connecting mechanism, and when transportation is needed, the base plate can be switched to a second combination state, so that the integral transportation of the modules 1 is facilitated, the structure is simple, and the practicability is high; and, when required, a plurality of modules can also be used as a bearing structure in a second combination state, so that the overall rigidity of the cushion plate can be increased. The utility model discloses a backing plate can adapt to diversified bearing demand to, under the second composite state, the transportation of single module 1 and a plurality of module 1 of being convenient for, extensive applicability, the practicality is strong.

Optionally, a plurality of modules 1 are arranged in at least one layer of the multilayer structure, the modules 1 in the same layer are connected through locking connection mechanisms, and at least one module 1 in the same layer is connected with the modules 1 in other layers through locking connection mechanisms.

Specifically, in the first assembled state, the modules 1 are connected by a locking connection structure (e.g., a connecting member 2 described later);

in the second assembled state, the modules 1 in the same layer are connected by locking connection structures (such as the connectors 2 described later), and at least one module 1 in the same layer is connected with the modules 1 in other layers by locking connection structures (such as the connectors 2 described later).

Similarly, in the present description, the description is given taking an example in which the plurality of modules 1 in the same layer are distributed in the second direction (i.e., the X-axis direction in the drawing), but they may also be distributed in the second direction and the third direction (i.e., the Y-axis direction in the drawing) in sequence, respectively. The number of the modules 1 in each layer of the multilayer structure can be the same or different, and the first layer and the second layer are sequentially marked from bottom to top in the multilayer structure, and so on.

As shown in fig. 3, the first layer to the third layer each include two modules 1, for example, in the first layer, in a first combination state, the two modules 1 of the first layer are connected by a connecting member 2, and in a second combination state, at least one module 1 of the first layer is connected with the module 1 of the second layer and/or the third layer by a connecting member 2.

In this way, in the second combination state, the modules 1 in the same layer are connected through a locking connection structure (for example, a connecting member 2 described later), and when the number of the modules 1 in the same layer is increased or decreased, the relative positions of the modules 1 in the same layer can be ensured to be locked, so that the modules 1 in the same layer are connected into a whole; and, at least one module 1 in the same layer is connected with the modules 1 in other layers through a locking connection structure (such as a connecting piece 2 described later), so that the overall structural stability of the multilayer structure can be ensured, the number of layers of the multilayer structure can be increased or decreased according to the actual bearing or transportation requirements, and/or the number of modules 1 in the same layer can be increased or decreased, and the reliability and the practicability are high.

The upper locking connection mechanism realizes the connection of the modules 1, but is not limited to this, and may be a fastener connection or the like, for example.

As shown in fig. 1 and 2, the locking connection mechanism may alternatively include a connection member 2, the connection member 2 being located at least one side of the module 1 in a direction (e.g., a third direction) perpendicular to the first direction, the connection member 2 being adapted to be connected to a plurality of modules 1, respectively.

In particular, the connecting elements 2 are intended to be connected respectively to a plurality of modules 1 in a first combined state and/or to a plurality of modules 1 of different layers in a second combined state.

Illustratively, in the first combination state, at least two modules 1 are distributed along the X-axis direction, at least two connecting members 2 are respectively located at two sides of the modules 1 along the Y-axis direction, and two ends of the connecting members 2 along the X-axis direction are respectively connected with the two modules 1. In a second combined state, the multilayer structure is at least provided with two layers, each layer is provided with one module 1, and at the moment, at least two connecting pieces 2 are respectively connected with the modules 1 positioned on different layers.

The connection manner of the connecting member 2 and each module 1 is not limited, and for example, it may be a connection by a fastener, or a connection by a latch, etc., which will be described later by way of example.

In this manner, the operation of connecting or disconnecting between the modules 1 and the connecting member 2 can be performed in the direction perpendicular to the first direction, facilitating the relative position locking between the modules 1 to be quickly achieved from the outside through the connecting member 2, for example, facilitating the operation in the third direction.

As shown in fig. 3 and 4, optionally, the module 1 is provided with a connecting portion 211 for connecting with the connecting member 2, the connecting portion 211 is a limiting post, the connecting member 2 is a limiting plate, the limiting plate is provided with a limiting hole, the limiting hole is used for being sleeved on the limiting post, and the limiting post is provided with a limiting structure 4 to limit the limiting plate to be separated from the limiting post.

That is to say, be provided with two at least spacing holes on the limiting plate, when the spacing post on different modules 1 is located respectively in two at least spacing holes of limiting plate, can realize that this is different between the module 1 at least in the relative position locking of limiting plate length direction.

The limiting structure 4 may be a snap spring, a nut, a spring pin, etc., and the scheme of using the spring pin is shown in the figure. The cross-sectional shapes of the limiting columns and the limiting holes are not limited to cylindrical shapes, and the limiting columns and the limiting holes can also be of other special-shaped structures, and are not described in detail here.

So, be convenient for from the outside through spacing hole on the limiting plate and module 1 on spacing post be connected realize limiting plate and module 1's reliable connection, limit structure 4 can ensure the reliability that limiting plate and module 1 are connected, reliability and stability through limiting plate connection between the module 1 are high.

As shown in fig. 3 and 4, optionally, the modules 1 are provided with connecting parts 211 for connecting with the connectors 2, in the first combination state, the distance between two adjacent connecting parts 211 of different modules 1 is a first distance L1, in the second combination state, the distance between at least two connecting parts 211 of modules 1 located in different layers is a second distance L2, and the second distance L2 is equal to the first distance L1.

Exemplarily, as shown in fig. 1 and fig. 2, which illustrate a case where the connecting member 2 is a limiting plate, as shown in fig. 1, in a first combination state, four modules 1 are sequentially distributed, and adjacent modules 1 are all connected by the connecting member 2, and three connecting members 2 from left to right may be sequentially referred to as a first connecting member 21, a second connecting member 22, and a third connecting member 23. The four modules 1 from left to right can be sequentially referred to as a first module 11, a second module 12, a third module 13, and a fourth module 14, at this time, one of the two connecting portions 211 connected by the second connecting member 22 located on the second module 12 is a first connecting portion, one located on the third module 13 is a second connecting portion, and a distance between the first connecting portion and the second connecting portion is a first distance L1.

The connection relationship between the second connection member 22 and the second connection portion of the third module 13 is released and the third module 13 and the fourth module 14 are placed above the first module 11 and the second module 12 while keeping the state in which the first connection member 21 is connected to the first module 11 and the second module 12, and the state in which the third connection member 23 is connected to the third module 13 and the fourth module 14, respectively. Illustratively, the third module 13 is located above the first module 11, and the fourth module 14 is located above the second module 12, at least one of the connection portions 211 in the third module 13 and the fourth module 14 is a third connection portion, the distance from the third connection portion to the first connection portion is a second distance L2, and the second distance L2 is equal to the first distance L1, so that the second connection member 22 can be connected to the first connection portion and the third connection portion, respectively, thereby achieving relative position locking of modules 1 of different layers in the first direction.

Thus, when necessary, the connecting member 2 in the first combination state is used for connecting the interfaces (e.g., the limiting holes described above) of the two connecting portions 211, and in the second combination state, the connecting member 2 can be directly used for connecting the connecting portions 211 of different modules 1 in the first direction, without adding other interfaces (e.g., the limiting holes described above) to the connecting member 2, so that the structure is simple, and the practicability is high.

Under the second combination state, the connecting line of the first connecting part and the third connecting part extends along the first direction or forms an included angle relative to the first direction.

Illustratively, the thickness of the module 1 in the first direction is equal to the first distance L1, and at least two connecting portions 211 are disposed on the same side of the module 1 along the Y-axis direction, the distance from the at least two connecting portions 211 to the edge of the module 1 is a third distance L3, and the third distance L3 is one-half of the first distance L1.

Taking the connecting portion 211 as a limiting column as an example, the third distance L3 is a distance from an axis of the limiting column to an end face of the module 1 along the X-axis direction. Illustratively, the connection portion is located on the center plane of the module 1 in the Z-axis direction, and will not be described in detail here.

So, when module 1 increases and decreases along second direction or first direction, connecting piece 2 all can realize module 1 in the connection of second direction or first direction to, the structural uniformity of each module 1 is high, can reduce the kind of module 1 to a certain extent, simple structure, and the practicality is strong.

In some cases, the connecting element 2 may also be embedded inside the module 1, improving the stability of the adjacent modules against forces in the first direction, which will not be described in detail here.

As shown in fig. 3 and 4, in the above embodiment, the backing plate may further include a plug connection structure, the plug connection structure includes a slot (not shown) and a plug 3, which are plugged into each other, and in the first combination state and the second combination state, any adjacent module 1 (which is distributed along a direction perpendicular to the first direction (for example, the second direction) is respectively provided with the slot and the plug 3.

In this way, relative movements of adjacent modules 1 (distributed in a direction perpendicular to the first direction), for example, in the first direction, can be limited by the plug connection structure, which can improve the stability of the connection of the modules 1 to a certain extent and can also reduce the structural limitation of the locking connection mechanism to a certain extent.

As shown in fig. 5, for example, in the first combination state, any adjacent modules 1 are connected by the plug connection structure, and the modules 1 are connected by the connecting member 2. Under the second composite state, all set up a plurality of modules 1 that distribute in proper order along the second direction in each layer of multilayer structure, each module 1 in at least one layer of multilayer structure is connected through connecting piece 2, and arbitrary adjacent module 1 of the same layer passes through the plug connection structural connection, and the module 1 that is located second direction both ends at least in the same layer passes through connecting piece 2 to be connected with the module 1 that is located other layers. In this case, the modules 1 of the second layer or the third layer can be connected only by the plug connection structure, so that the structure can be simplified to some extent, for example, the requirement for the number of connectors 2 is reduced, and will not be described in detail herein.

At this time, the plugging direction of the socket and the plug 3 coincides with the distribution direction (e.g., the second direction) of the modules 1.

The two ends of the module 1 (along the distribution direction of the module 1 in the first plane) are respectively provided with a slot and an insertion block 3.

As shown in fig. 1, in the first combination state, the slots of the modules 1 are located in the opposite direction of the X axis, and the insertion blocks 3 of the modules 1 are located in the positive direction of the X axis. In this case, the modules 1 have high structural consistency, which is beneficial to reducing the types of materials.

In other embodiments, the first module 11 and the third module 13 may have slots at both ends along the X-axis direction, and the second module 12 and the fourth module 14 may have insertion blocks 3 at both ends along the X-axis direction. In this case, four modules 1 may be combined to form the second combined state shown in fig. 2, but this case may require at least two types of modules 1, i.e., a module 1 having slots at both ends in the X-axis direction and a module 1 having insertion blocks 3 at both ends in the X-axis direction.

Further, in any direction (e.g., the second direction) perpendicular to the plugging direction of the socket, the inner walls of the socket are disposed close to the edge of the module 1.

It should be noted that the distance between the inner wall of the slot and the edge of the module 1 is determined according to the specific structural rigidity requirement, for example, taking the inner wall of the slot in the third direction as an example, the distance between the inner wall and the edge of the module 1 (i.e. the end wall in the third direction) is 10-30 cm.

So, the inner wall of slot all is close to the edge setting of module 1, can increase the cross-sectional area of grafting connection structure in the plane of perpendicular to grafting direction, strengthens the connection stability of adjacent module 1 in this plane, and the reliability is high.

Furthermore, the inner wall of the slot is provided with a convex block, the insertion block 3 is provided with a groove 31 corresponding to the convex block, and the convex block is in insertion fit with the corresponding groove 31.

Illustratively, the extending direction of the bump is the same as the second direction, the bump is disposed on the inner wall of the groove 31 along the third direction (i.e. the Z-axis direction), and the bump may be one or more.

So, set up lug and recess 31, can increase slot and 3 plug connection's of inserted block area of contact, reinforcing force stability can also strengthen the structural rigidity of slot in lug department to a certain extent.

In addition, in the above embodiment, when the plurality of modules 1 are distributed in both the X-axis direction and the Y-axis direction in the first plane, a plurality of modules distributed in the X-axis direction may be connected to form a module group (for example, connected by the connectors located at both ends in the Y-axis direction), and then a plurality of module groups may be distributed in the Y-axis direction and connected (for example, connected by the connectors located at both ends in the X-axis direction).

Another embodiment of the utility model provides an engineering machine tool, engineering machine tool include the landing leg backing plate, and the landing leg backing plate is as above backing plate.

For example, the work machine is a crane, and the crane comprises a support leg (such as a telescopic support leg) and the support leg base plate.

The engineering machine has all the advantages of the base plate, and the detailed description is omitted here.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims (10)

1. A tie plate, comprising a plurality of modules (1) and a locking connection mechanism, wherein the plurality of modules (1) have a first combined state distributed in sequence in at least one direction in a first plane and a second combined state stacked in the first direction to form a multilayer structure, and the first direction is arranged perpendicularly to the first plane;

the locking connection mechanism is used for being connected with the modules (1) in the first combination state respectively and used for being connected with the modules (1) which are located at different layers in the second combination state respectively so as to keep the relative positions of the modules (1) locked.

2. Underlay sheet according to claim 1, characterized in that a plurality of modules (1) are arranged in at least one layer of the multilayer structure, that the modules (1) in the same layer are connected by means of the locking connection, and that at least one of the modules (1) in the same layer is connected by means of the locking connection with the modules (1) located in other layers.

3. Tie plate according to claim 1, characterized in that said locking connection comprises a connecting element (2), said connecting element (2) being located on at least one side of said modules (1) in a direction perpendicular to said first direction, said connecting element (2) being intended to be connected to a plurality of said modules (1), respectively.

4. The backing plate according to claim 1, wherein the locking connection mechanism comprises a connection member (2), the module (1) is provided with a connection portion (211) for connecting with the connection member (2), the connection portion (211) is a limiting post, the connection member (2) is a limiting plate, the limiting plate is provided with a limiting hole, the limiting hole is used for being sleeved on the limiting post, the limiting post is provided with a limiting structure (4), and the limiting structure (4) is used for limiting the limiting plate to be separated from the limiting post.

5. The tie plate according to claim 3, characterized in that the modules (1) are provided with connecting portions (211) for connecting with the connecting members (2), wherein in the first assembled state, the distance between two adjacent connecting portions (211) of different modules (1) is a first distance, and in the second assembled state, the distance between at least two connecting portions (211) of different modules (1) is a second distance, and the second distance is equal to the first distance.

6. The tie plate according to any one of claims 1 to 5, further comprising a plug-in connection structure, wherein the plug-in connection structure comprises a plug-in slot and a plug-in block (3) which are plugged into each other, and in the first combination state and the second combination state, any adjacent module (1) is respectively provided with the plug-in slot and the plug-in block (3).

7. The underlay sheet according to claim 6, characterized in that the modules (1) are provided with the slots and the inserts (3) at both ends, respectively.

8. The underlay sheet of claim 6, characterized in that the inner walls of the slots are arranged close to the edges of the modules (1) in any direction perpendicular to the plugging direction of the slots.

9. The tie plate of claim 6, wherein the inner wall of the slot is provided with a projection, the insert block (3) is provided with a groove (31) corresponding to the projection, and the projection is in inserted fit with the corresponding groove (31).

10. A construction machine comprising a leg rest as claimed in any one of claims 1 to 9.

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