Protective device and working machine

Abstract

The utility model relates to the field of operation machinery, and discloses a protection device and operation machinery. The protection device comprises a first protection plate used for being connected with the frame, the length and the width of the first protection plate extend in the first direction and the second direction respectively, in the second direction, the first protection plate is provided with a first end and a second end, the first end of the first protection plate is provided with a plurality of containing grooves distributed in the first direction, and the second end of the first protection plate is provided with an avoiding groove; a receding groove is formed between at least part of every two adjacent containing grooves. The second protection plate is connected with the first protection plate in the third direction, the second protection plate is a flat plate and forms an angle with the first protection plate, and in the second direction, the minimum distance between the second protection plate and the second end of the first protection plate is larger than or equal to the depth of the receding groove. The second protection plate is a straight plate, the structure is simple, machining is convenient, the position of the second protection plate is higher than the position of the receding groove, the requirement for installation precision is relatively low, and the installation difficulty is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of crawlers, in particular to a protective device and an operating machine. Background Art

[0002] Crawler-type running gear operates in harsh environments, where the tracks and rollers are susceptible to damage from impacts with foreign objects. To protect the tracks and rollers, a protective device is typically installed on the outside of the rollers. This protective device consists of a vertical plate and a bottom plate. The vertical plate is located outside the rollers and connected to the vehicle frame. The bottom plate is located on the side of the vertical plate facing away from the rollers and is connected to the end of the vertical plate away from the vehicle frame.

[0003] During operation, the track shoes of a crawler-type walking device come into contact with protruding objects on the ground, causing them to bulge inward. This bulging track shoe can easily interfere with the protective device, causing wear on the track shoe. Therefore, to prevent the track shoe from slipping, the lower edge of the vertical plate is usually designed with a wavy structure. Accordingly, the bottom plate is arranged to extend along the wavy structure, forming a wavy plate.

[0004] However, the processing of corrugated plates is difficult, resulting in high processing costs. In addition, in order to ensure that the undulating state of the corrugated plate and the corrugated structure are consistent, the corrugated plate needs to be accurately aligned with the corrugated structure at the bottom edge of the vertical plate, which requires high installation precision and makes the installation of corrugated plates more difficult. Utility Model Content

[0005] In view of this, the present invention provides a protective device and an operating machine to solve or improve the problem that corrugated plates are difficult to process and install.

[0006] In a first aspect, the present invention provides a protective device having a first direction, a second direction, and a third direction intersecting in pairs, including:

[0007] a first guard plate, configured to be connected to the vehicle frame, wherein the length and width of the first guard plate extend along the first direction and the second direction respectively, and in the second direction, the first guard plate has a first end and a second end, the first end of the first guard plate being provided with a plurality of receiving slots arranged along the first direction, the second end of the first guard plate being provided with an avoidance slot, and the avoidance slot being provided between at least some adjacent two of the receiving slots;

[0008] A second guard plate is connected to the first guard plate in the third direction. The second guard plate is configured as a flat plate and is arranged at an angle to the first guard plate. In the second direction, the minimum distance between the second guard plate and the outermost edge of the second end of the first guard plate is greater than or equal to the depth of the avoidance groove.

[0009] In an optional embodiment, the first guard plates are provided in pairs, and any pair of the first guard plates are arranged at intervals in the third direction, and the protective device further includes a connecting assembly;

[0010] The connecting assembly is connected between any pair of the first guard plates, and in the first direction, two connecting assemblies are provided between at least two adjacent accommodating grooves, and in the first direction and the second direction, the projections of the two connecting assemblies are staggered.

[0011] In an optional embodiment, the protective device further includes a mounting structure, wherein the mounting structure and the second guard plate are located on the same side of the first guard plate, the mounting structure is connected to the first guard plate, the mounting structure is provided with a connecting hole extending in a second direction, the connecting hole is used to connect to the vehicle frame, and in the second direction, the projections of the connecting hole and the connecting assembly are staggered;

[0012] And / or, the connecting assembly includes a supporting tube and a connecting piece, the supporting tube is supported between the two first guard plates, and the connecting piece is passed through the supporting tube and connects the two first guard plates.

[0013] In an optional embodiment, the mounting structure includes:

[0014] A bent plate comprising a first plate extending along the first direction and a second plate extending along the second direction, wherein the first plate and the second plate are both connected to the first guard plate, and the second plate is further connected to the second guard plate, and the connecting hole is provided on the first plate;

[0015] A connecting plate is connected to the first guard plate, and the connecting plate connects the second plate body and the second guard plate.

[0016] In an optional embodiment, a hoisting hole is provided on the first guard plate, and the hoisting hole passes through the first guard plate along the third direction.

[0017] In an optional embodiment, the protective device further includes a sealing plate, which is arranged on the same side of the first guard plate as the second guard plate, and is rotatably connected to the first guard plate and is used to seal the lifting hole.

[0018] In an optional embodiment, the sealing plate is used to rotate and seal the lifting hole under the action of gravity;

[0019] And / or, the protective device further includes a magnetic member or an elastic member, wherein the magnetic member or the elastic member is connected to the first guard plate and is used to drive the sealing plate to move toward the first guard plate.

[0020] In an optional embodiment, the second guard plate includes a plate body and a folding plate;

[0021] In the first direction, the folding plate is connected to one end of the plate body, and both the folding plate and the plate body are connected to the first guard plate. The folding plate is inclined away from one end of the plate body toward the first end of the first guard plate.

[0022] In an optional embodiment, the protective device further includes a reinforcing rib plate, which connects the plate body and the folding plate.

[0023] In a second aspect, the present invention further provides an operating machine comprising the protective device as described above.

[0024] The protective device of the present invention can form a clearance for the central axis of the supporting roller through the receiving groove at the first end of the first guard plate, so that the first guard plate can be installed at the end of the supporting roller to protect the supporting roller. By providing a clearance groove at the second end of the first guard plate, and the clearance groove is arranged between two adjacent receiving grooves, it can form a clearance for the track shoe to prevent interference between the track shoe and the first guard plate.

[0025] By making the minimum distance between the second guard plate and the outermost edge of the second end of the first guard plate greater than or equal to the depth of the avoidance groove, the second guard plate will not interfere with or collide with the track plate during the process of the track plate protruding inward into the avoidance groove. In addition, the second guard plate is a straight plate with a simple structure and is easy to process. The position of the second guard plate only needs to be higher than the position of the avoidance groove. The installation accuracy requirement is relatively low and the installation difficulty is lower.

[0026] The operating machine provided by the utility model includes the protective device, and thus includes all the above advantages of the protective device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic structural diagram of a protective device provided in an embodiment of the present utility model;

[0029] Figure 2 for Figure 1 a front view of the guard shown;

[0030] Figure 3This is a schematic structural diagram of another protective device provided in an embodiment of the present utility model;

[0031] Figure 4 for Figure 3 Schematic diagram of the installation of the protective device and the supporting wheel;

[0032] Figure 5 This is a schematic structural diagram of another protective device according to an embodiment of the present utility model;

[0033] Figure 6 This is a schematic structural diagram of a frame of a working machine provided in an embodiment of the present utility model.

[0034] Description of reference numerals:

[0035] 1. First guard plate; 101. Accommodating groove; 102. Avoiding groove; 103. Lifting hole; 2. Second guard plate; 201. Plate body; 202. Folding plate; 3. Connecting assembly; 301. Support tube; 302. Connecting piece; 4. Mounting structure; 401. Connecting hole; 402. Bending plate; 4021. First plate body; 4022. Second plate body; 403. Connecting plate; 5. Reinforcing rib plate; 6. Support wheel; 7. Frame; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0037] In the related art, in order to avoid the crawler shoes, the lower edge of the vertical plate is usually set to a wave-shaped structure. Correspondingly, the bottom plate is arranged along the wave-shaped structure, that is, the bottom plate forms a wave-shaped plate.

[0038] However, the processing of corrugated plates is difficult, resulting in high processing costs. In addition, in order to ensure that the undulating state of the corrugated plate and the corrugated structure are consistent, the corrugated plate needs to be accurately aligned with the corrugated structure at the bottom edge of the vertical plate, which requires high installation precision and makes the installation of corrugated plates more difficult.

[0039] In order to solve or improve the problem that the corrugated plate is difficult to process and install, a protective device and an operating machine are provided in an embodiment of the present invention.

[0040] The following combination Figures 1 to 6, describing the protective device provided in an embodiment of the present utility model.

[0041] Specifically, the protection device has a first direction X, a second direction Y, and a third direction Z, and the first direction X, the second direction Y, and the third direction Z intersect with each other. For example, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0042] The protective device comprises a first guard plate 1 and a second guard plate 2 .

[0043] Among them, reference Figure 5 、 Figure 6 As shown, the first guard plate 1 is used to connect to the vehicle frame 7. The length and width of the first guard plate 1 extend along a first direction X and a second direction Y, respectively. That is, the length of the first guard plate 1 extends along the first direction X, and the width of the first guard plate 1 extends along the second direction Y. For example, the first direction X is the front-to-back direction of the vehicle frame 7, and the second direction Y is the height direction of the vehicle frame 7.

[0044] In the second direction Y, the first guard plate 1 has a first end and a second end. The first end of the first guard plate 1 is provided with a plurality of receiving slots 101 arranged along the first direction X. For example, the receiving slots 101 can be used to clear the central axis of the supporting wheel 6. The second end of the first guard plate 1 is provided with a clearance slot 102, with a clearance slot 102 being provided between at least some adjacent receiving slots 101. For example, a clearance slot 102 is provided between any two adjacent receiving slots 101.

[0045] Since the receiving grooves 101 correspond to the supporting rollers 6, the portion between two adjacent receiving grooves 101 corresponds to the space between the two adjacent supporting rollers 6. When the track shoe runs between two adjacent supporting rollers 6, it lacks the support of the supporting rollers 6 and is easily protruded inwardly by the action of ground protrusions. By providing an avoidance groove 102 between two adjacent receiving grooves 101, the track shoe can enter the avoidance groove 102 during the inward protrusion process, thereby preventing the track shoe from colliding or interfering with the first guard plate 1.

[0046] The second guard plate 2 is connected to the first guard plate 1 in the third direction Z, for example, by welding. Optionally, the length of the second guard plate 2 extends along the first direction X, and the width of the second guard plate 2 extends along the third direction Z. The second guard plate 2 is disposed on the side of the first guard plate 1 facing away from the supporting wheel 6. The second guard plate 2 is a flat plate and is disposed at an angle to the first guard plate 1, for example, perpendicular to the first guard plate 1.

[0047] In the second direction Y, the minimum distance between the second guard plate 2 and the outermost edge of the second end of the first guard plate 1 is greater than or equal to the depth of the avoidance groove 102. Figure 2As shown, the minimum distance between the second end of the second guard plate 2 and the second end of the first guard plate 1 is L, and the depth of the avoidance groove 102 is H, then L is greater than or equal to H.

[0048] In this embodiment, the receiving groove 101 at the first end of the first guard plate 1 can be used to avoid the central axis of the supporting roller 6, so that the first guard plate 1 can be installed at the end of the supporting roller 6 to protect the supporting roller 6. By providing an avoidance groove 102 at the second end of the first guard plate 1, and the avoidance groove 102 is provided between two adjacent receiving grooves 101, a avoidance groove is formed for the track shoe to prevent interference between the track shoe and the first guard plate 1.

[0049] By making the minimum distance between the second guard plate 2 and the second end of the first guard plate 1 greater than or equal to the depth of the avoidance groove 102, the second guard plate 2 will not interfere with or collide with the track plate during the process of the track plate protruding inward into the avoidance groove 102. In addition, the second guard plate 2 is a straight plate with a simple structure and is easy to process. The position of the second guard plate 2 only needs to be higher than the position of the avoidance groove 102. The installation accuracy requirement is relatively low and the installation difficulty is lower.

[0050] In addition, the second guard plate 2 is installed on the first guard plate 1, which is equivalent to adding reinforcement ribs to the first guard plate 1. It can increase the rigidity of the first guard plate 1, thereby improving the impact resistance of the first guard plate 1 and ensuring the protective effect of the protective device. At the same time, the second guard plate 2 covers the inner surface of the crawler shoe, which can prevent foreign objects from impacting and wearing the inner surface of the crawler shoe, thereby improving the protective effect of the protective device.

[0051] refer to Figure 2 As shown, optionally, the receiving groove 101 is configured as a half-waist groove.

[0052] refer to Figure 2 As shown, optionally, the avoidance groove 102 is configured as a trapezoidal groove. Of course, the avoidance groove 102 can also be configured as a triangular groove or an arc groove.

[0053] refer to Figure 3-Figure 5 As shown, in some embodiments provided by the present invention, the first guard plates 1 are provided in pairs, and any pair of first guard plates 1 is spaced apart in the third direction Z. During use, the pair of first guard plates 1 is provided at both ends of the supporting roller 6 to respectively protect the inner and outer ends of the supporting roller 6. Furthermore, the second guard plate 2 is connected to the side of any first guard plate 1 away from the supporting roller 6.

[0054] The protective device also includes a connecting assembly 3, which is connected between any pair of first guard plates 1. In the first direction X, two connecting assemblies 3 are provided between at least some adjacent two receiving slots 101, and the projections of the two connecting assemblies 3 are staggered in the first direction X and in the second direction Y.

[0055] In this embodiment, staggered connection assemblies 3 arranged in different directions effectively disperse the effects of external forces on the structure, thereby improving the stability and compressive resistance of the entire structure. Furthermore, the staggered arrangement of connection assemblies 3 better resists deformations such as torsion and bending, making the protective device more robust and less susceptible to deformation when subjected to external impact or pressure.

[0056] Optionally, refer to Figure 3 As shown, two connecting components 3 are connected between some adjacent accommodating grooves 101, and the two connecting components 3 are staggered in the first direction X and the second direction Y. Between the remaining two adjacent accommodating grooves 101, one connecting component 3 can be arranged or no connecting component 3 can be arranged according to the actual space conditions.

[0057] Optionally, refer to Figure 5 As shown, the protective device includes two pairs of first guard plates 1. The two pairs of first guard plates 1 are arranged in sequence along the first direction X, and each pair of first guard plates 1 is distributed at both ends of the supporting wheel 6. A second guard plate 2 is provided on the side of each first guard plate 1 facing away from the supporting wheel 6.

[0058] In this embodiment, two pairs of first guard plates 1 arranged along the first direction X are provided to jointly protect the crawler track, so that the protective device has a segmented structure. This facilitates the processing and transportation of the protective device on the one hand, and on the other hand, if any section of the protective device is damaged, only the damaged structure needs to be replaced, thereby reducing the maintenance cost of the protective device.

[0059] In some embodiments provided by the present invention, the protective device further includes a mounting structure 4 .

[0060] The mounting structure 4 and the second guard plate 2 are located on the same side of the first guard plate 1, that is, the mounting structure 4 is also arranged on the side of the second guard plate 2 away from the supporting wheel 6. The mounting structure 4 is connected to the first guard plate 1. For example, the mounting structure 4 can be welded, connected with threaded fasteners, or integrally formed with the first guard plate 1.

[0061] The mounting structure 4 is provided with a connection hole 401 extending along the second direction Y, and the connection hole 401 is used to connect with the frame 7. For example, the connection hole 401 passes through the mounting structure 4, and fasteners such as threaded fasteners or rivets pass through the connection hole 401 and are connected to the frame 7.

[0062] In the second direction Y, the projections of the connecting hole 401 and the connecting component 3 are staggered.

[0063] In this embodiment, by staggering the connection hole 401 and the connection component 3, interference between the fasteners passing through the connection hole 401 and the connection component 3 can be avoided during the installation process, thereby reducing the difficulty of installing the protective device and ensuring that the protective device can be installed smoothly.

[0064] Optionally, a through hole is provided at a position of the second guard plate 2 opposite to the connecting hole 401 . By providing the through hole, installation tools such as a socket wrench can pass through the through hole to screw the fastener passing through the connecting hole 401 .

[0065] In some embodiments provided by the present invention, the connection assembly 3 includes a support tube 301 and a connection member 302 .

[0066] The support tube 301 is supported between the two first guard plates 1 , that is, both ends of the support tube 301 are respectively against the two first guard plates 1 .

[0067] The connector 302 is inserted into the support tube 301 and connects the two first guard plates 1. For example, the connector 302 includes a screw and a nut, and the screw passes through one first guard plate 1, the support tube 301 and the other first guard plate 1 and is threadedly connected to the nut.

[0068] In this embodiment, the support tube 301 is supported between the two first guard plates 1. When any one of the first guard plates 1 is impacted, the impact can be transmitted to the other first guard plate 1 through the support tube 301, so that the two first guard plates 1 jointly bear the impact load, avoiding stress concentration and deformation of the first guard plates 1, and improving the protective performance of the first guard plates 1.

[0069] By connecting the two first guard plates 1 through the connecting piece 302 , the connection strength between the first guard plates 1 can be improved, thereby improving the overall strength of the protective device to ensure the protective performance of the protective device.

[0070] By passing the connecting piece 302 through the support tube 301, on the one hand, the support tube 301 can be positioned to prevent the support tube 301 from displacement; on the other hand, the internal space of the support tube 301 can be utilized to improve the structural compactness of the connecting component 3, reduce the space occupied by the connecting component 3 between the two first guard plates 1, reduce the difficulty of the layout of the connecting component 3, and reduce the occurrence of interference problems.

[0071] In some embodiments provided by the present invention, the mounting structure 4 includes a bent plate 402 and a connecting plate 403 .

[0072] The bending plate 402 includes a first plate 4021 extending along a first direction X and a second plate 4022 extending along a second direction Y. The first plate 4021 and the second plate 4022 are both connected to the first guard plate 1 , and the second plate 4022 is also connected to the second guard plate 2 . The connecting hole 401 is provided on the first plate 4021 .

[0073] The connecting plate 403 is connected to the first guard plate 1 , and the connecting plate 403 is connected to the second plate body 4022 and the second guard plate 2 .

[0074] In this embodiment, the bending plate 402 connects the first guard plate 1 and the second guard plate 2, and the connecting plate 403 connects the first guard plate 1 and the second guard plate 2, so that the mounting structure 4 can be connected to the frame 7 and improve the connection strength between the first guard plate 1 and the second guard plate 2.

[0075] The bending plate 402 includes a first plate body 4021 and a second plate body 4022. The connecting plate 403 is connected to the first guard plate 1, so that the connecting plate 403 and the bending plate 402 form a cavity structure, and the connecting hole 401 is arranged on the side wall of the cavity structure to facilitate the operation and screwing of the fastener in the connecting hole 401 in the cavity structure.

[0076] Optionally, the bending plate 402 is welded to the first guard plate 1 and the second guard plate 2 respectively, and the connecting plate 403 is welded to the bending plate 402 and the second guard plate 2 respectively.

[0077] In some embodiments provided by the present invention, a hoisting hole 103 is provided on the first guard plate 1 , and the hoisting hole 103 passes through the first guard plate 1 along the third direction Z.

[0078] In this embodiment, by providing the hoisting holes 103 on the first guard plate 1, the protective device can be hoisted through the hoisting holes 103 to facilitate installation and removal of the protective device. On the other hand, the operating machine can be hoisted as a whole through the hoisting holes 103.

[0079] Optionally, refer to Figure 5 As shown, when the first guard plates 1 are provided in two pairs, both pairs of first guard plates 1 are provided with hanging holes 103 .

[0080] Optionally, the hoisting hole 103 is provided between two adjacent accommodating slots 101 to avoid interference with the track wheels 6 during the hoisting process.

[0081] Optionally, the lifting hole 103 is arranged in the space enclosed by the bending plate 402 and the connecting plate 403. Through the blocking effect of the bending plate 402 and the connecting plate 403, external debris is reduced from entering the inner side of the first guard plate 1 through the lifting hole 103 and affecting the supporting wheel 6.

[0082] In some embodiments provided by the present invention, the protective device further includes a sealing plate.

[0083] The sealing plate and the second guard plate 2 are arranged on the same side of the first guard plate 1 . The sealing plate is rotatably connected to the first guard plate 1 and is used to block the lifting hole 103 .

[0084] In this embodiment, by setting a sealing plate to block the hoisting hole 103, it is possible to reduce foreign matter from entering the inner side of the first guard plate 1 through the hoisting hole 103 and affecting the supporting wheel 6. When hoisting is required, the sealing plate can be rotated to open the hoisting hole 103.

[0085] In some embodiments provided by the present invention, the sealing plate is used to rotate under the action of gravity and block the hanging hole 103. Specifically, one end of the sealing plate close to the first end of the first guard plate 1 is rotatably connected to the first guard plate 1.

[0086] In this embodiment, gravity keeps the sealing plate permanently closed over the hanging hole 103. With this arrangement, foreign matter acting on the sealing plate can only press the sealing plate against the first guard plate 1 and cannot enter the inside of the first guard plate 1 through the hanging hole 103. However, foreign matter inside the first guard plate 1 can push the sealing plate aside and be discharged through the hanging hole 103.

[0087] Of course, the sealing plate is not limited to closing the hanging hole 103 under the action of gravity. For example, in other embodiments provided by the present invention, the protective device further includes a magnetic member or an elastic member.

[0088] The magnetic member or elastic member is connected to the first guard plate 1 and is used to drive the closing plate to move closer to the first guard plate 1. Optionally, the magnetic member is provided on the joint surface of the first guard plate 1 and the closing plate, and the elastic member is provided as a torsion spring or a tension spring.

[0089] In this embodiment, under the action of the magnetic member and the elastic member, the sealing plate can be driven to move closer to the first guard plate 1 to close the hanging hole 103, thereby improving the reliability of the sealing plate closure.

[0090] Furthermore, under the premise that the sealing plate closes the lifting hole 103 under the action of gravity, a magnetic part or an elastic part can also be provided to drive the sealing plate to further improve the reliability of the sealing plate closure.

[0091] refer to Figure 2-Figure 3 As shown, in some embodiments provided by the present invention, the second guard plate 2 includes a plate body 201 and a folding plate 202 .

[0092] In the first direction X, the folding plate 202 is connected to one end of the plate body 201 , and both the folding plate 202 and the plate body 201 are connected to the first guard plate 1 . The end of the folding plate 202 away from the plate body 201 is inclined toward the first end of the first guard plate 1 .

[0093] In this embodiment, the folding plate 202 can be close to the driving wheel or guide wheel. Since the track plate will gradually rise when it runs close to the driving wheel or guide wheel, by tilting the end of the folding plate 202 away from the plate body 201 toward the first end of the first guard plate 1, the probability of collision between the track plate and the second guard plate 2 can be reduced.

[0094] In some embodiments provided by the present invention, the protective device further includes a reinforcing rib plate 5 . The reinforcing rib plate 5 connects the plate body 201 and the folding plate 202 .

[0095] In this embodiment, by providing a reinforcing rib plate 5 to connect the plate body 201 and the flip plate, the connection strength between the flip plate 202 and the plate body 201 can be improved.

[0096] The utility model also provides an operating machine.

[0097] Specifically, the work machine includes the guard device described above.

[0098] It should be noted that the operating machinery includes a protective device, which also includes all the above-mentioned advantages of the protective device, so it will not be elaborated on.

[0099] The working machinery described in the present invention includes but is not limited to a crawler excavator or a crawler crane.

[0100] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A protective device, characterized in that: Having a first direction (X), a second direction (Y), and a third direction (Z) that intersect each other, including: A first guard plate (1) is used to be connected to the vehicle frame (7); the length and width of the first guard plate (1) extend along the first direction (X) and the second direction (Y), respectively; in the second direction (Y), the first guard plate (1) has a first end and a second end; the first end of the first guard plate (1) is provided with a plurality of receiving grooves (101) arranged along the first direction (X); the second end of the first guard plate (1) is provided with an avoidance groove (102); the avoidance groove (102) is provided between at least part of two adjacent receiving grooves (101); A second guard plate (2) is connected to the first guard plate (1) in the third direction (Z), the second guard plate (2) is configured as a flat plate and is arranged at an angle to the first guard plate (1), and in the second direction (Y), the minimum distance between the second guard plate (2) and the outermost edge of the second end of the first guard plate (1) is greater than or equal to the depth of the avoidance groove (102).

2. The protective device according to claim 1, characterized in that The first guard plates (1) are arranged in pairs, and any pair of the first guard plates (1) are spaced apart in the third direction (Z), and the protective device further comprises a connecting assembly (3); The connecting assembly (3) is connected between any pair of the first guard plates (1), and in the first direction (X), two connecting assemblies (3) are provided between at least two adjacent accommodating grooves (101), and in the first direction (X) and the second direction (Y), the projections of the two connecting assemblies (3) are staggered.

3. The protective device according to claim 2, characterized in that: The protective device further comprises a mounting structure (4), wherein the mounting structure (4) and the second guard plate (2) are located on the same side of the first guard plate (1), the mounting structure (4) is connected to the first guard plate (1), the mounting structure (4) is provided with a connecting hole (401) extending along a second direction (Y), the connecting hole (401) is used to connect to the vehicle frame (7), and in the second direction (Y), the projections of the connecting hole (401) and the connecting assembly (3) are staggered; And / or, the connecting assembly (3) comprises a supporting tube (301) and a connecting piece (302), wherein the supporting tube (301) is supported between the two first guard plates (1), and the connecting piece (302) is passed through the supporting tube (301) and connects the two first guard plates (1).

4. The protective device according to claim 3, characterized in that: The mounting structure (4) comprises: A bending plate (402) comprising a first plate body (4021) extending along the first direction (X) and a second plate body (4022) extending along the second direction (Y), wherein the first plate body (4021) and the second plate body (4022) are both connected to the first guard plate (1), and the second plate body (4022) is also connected to the second guard plate (2), and the connecting hole (401) is provided on the first plate body (4021); A connecting plate (403) is connected to the first guard plate (1), and the connecting plate (403) connects the second plate body (4022) and the second guard plate (2).

5. The protective device according to any one of claims 1 to 4, characterized in that: The first guard plate (1) is provided with a hoisting hole (103), and the hoisting hole (103) passes through the first guard plate (1) along the third direction (Z).

6. The protective device according to claim 5, characterized in that: The protective device also includes a sealing plate, which is arranged on the same side of the first guard plate (1) as the second guard plate (2), and is rotatably connected to the first guard plate (1) and is used to seal the lifting hole (103).

7. The protective device according to claim 6, characterized in that The sealing plate is used to rotate and seal the hanging hole (103) under the action of gravity; And / or, the protective device further comprises a magnetic member or an elastic member, wherein the magnetic member or the elastic member is connected to the first guard plate (1) and is used to drive the sealing plate to move in a direction close to the first guard plate (1).

8. The protective device according to any one of claims 1 to 4, characterized in that: The second guard plate (2) comprises a plate body (201) and a folding plate (202); In the first direction (X), the folding plate (202) is connected to one end of the plate body (201), the folding plate (202) and the plate body (201) are both connected to the first guard plate (1), and the folding plate (202) is inclined in a direction away from the end of the plate body (201) toward the first end of the first guard plate (1).

9. The protective device according to claim 8, characterized in that The protective device further comprises a reinforcing rib plate (5), wherein the reinforcing rib plate (5) connects the plate body (201) and the folding plate (202).

10. A working machine, characterized in that: The protective device comprises the protective device according to any one of claims 1 to 9.

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