Protective cover plate structure and operation machine

Abstract

The utility model relates to the technical field of operation machinery, and discloses a protective cover plate structure and operation machinery. The protective cover plate structure comprises a cover plate body which is arranged above an oil cylinder of the dozer blade in a covering mode and movably connected with the dozer blade and the frame body. And the limiting flexible cable is arranged between the cover plate body and the frame main body and is used for limiting the maximum moving position of the cover plate body relative to the frame main body. The cover plate body is respectively and movably connected with the dozer blade and the frame main body, so that the cover plate body can move along with the dozer blade, the oil cylinder can be always in a state of being protected by the cover plate body, and the probability that the oil cylinder is damaged by foreign matters is reduced. In addition, the limiting flexible cable is arranged between the cover plate body and the vehicle frame body, the cover plate body can be prevented from exceeding the preset movement range, and the safety of the operation machine in the construction operation process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of operating machinery, in particular to a protective cover plate structure and an operating machinery. Background Art

[0002] The bulldozer on the working machine is generally raised or lowered by the oil cylinder installed on the frame body. In order to prevent the oil cylinder from being damaged by foreign objects, a protective cover is usually installed above the oil cylinder to extend the service life of the oil cylinder. Since the protective cover moves with the bulldozer, during the operation of the bulldozer, the protective cover may move excessively and exceed the preset range of movement, thereby causing damage to the structure of the working machine itself or the staff near the working machine. Utility Model Content

[0003] In view of this, the utility model provides a protective cover plate structure and an operating machine to solve the problem that the protective cover plate may excessively move during the movement of the bulldozer.

[0004] In a first aspect, the utility model provides a protective cover structure, comprising:

[0005] The cover plate body is arranged above the oil cylinder of the bulldozer and is movably connected to the bulldozer and the frame body respectively;

[0006] The limit flexible cable is arranged between the cover plate body and the frame body, and is used to limit the maximum moving position of the cover plate body relative to the frame body.

[0007] Beneficial effects: The utility model movably connects the cover plate body to the bulldozer and the frame body, respectively, so that the cover plate body can move with the bulldozer, so that the oil cylinder can always be protected by the cover plate body, reducing the probability of the oil cylinder being damaged by foreign objects. In addition, a limit rope is set between the cover plate body and the frame body, which can prevent the cover plate body from exceeding the preset movement range, improve the safety of the operating machinery during construction, and solve the problem that the protective cover plate may move excessively during the movement of the bulldozer.

[0008] In an optional embodiment, the position-limiting flexible cable is detachably connected to the cover plate body, and / or the position-limiting flexible cable is detachably connected to the frame body.

[0009] Beneficial effects: The utility model adopts a detachable connection design, which is convenient for installing and disassembling the limit rope on the one hand; on the other hand, it is convenient to flexibly adjust the length of the limit rope, so that the limit rope can better meet the needs of different working scenarios. In addition, by adopting a detachable connection design, it will not interfere with the subsequent disassembly of the cover body, so it is convenient for the staff to regularly maintain the structure under the cover body, such as the oil cylinder and the pipelines that cooperate with the oil cylinder.

[0010] In an optional embodiment, a locking piece is provided on the position-limiting flexible cable, and a locking mating piece that matches with the locking piece is provided on the cover body and / or the frame body.

[0011] Beneficial effect: The utility model, by providing a locking piece and a matching locking matching piece, can not only allow the limiting flexible cable to limit the maximum moving position of the cover body relative to the frame body, but also realize the detachable connection between the limiting flexible cable and the cover body and / or the frame body, thereby simplifying the installation and disassembly operations between the limiting flexible cable and the cover body, and between the limiting flexible cable and the frame body.

[0012] In an optional embodiment, the locking member is a lock buckle, and the locking matching member is a hanging ring.

[0013] Beneficial effect: The utility model can realize the detachable connection between the limit flexible cable and the frame body and / or the cover body through the cooperation of the lock buckle and the lifting ring. In addition, the structure of the lock buckle and the lifting ring is relatively simple, so it is convenient to operate and the subsequent maintenance and replacement cost is low.

[0014] In an optional embodiment, a sleeve is provided on one side of the cover body for connecting to the bulldozer, a fixing plate is provided on the bulldozer, a through hole is provided on the fixing plate and is coaxially arranged with the sleeve, and the cover body and the bulldozer are rotatably connected by a connecting shaft passing through the through hole and the sleeve.

[0015] Beneficial effects: The utility model realizes the rotational connection between the cover plate body and the bulldozer shovel through the fixing plate, the through hole, the sleeve and the connecting shaft, so that the cover plate body can rotate with the bulldozer shovel, thereby ensuring the coordination between the cover plate body and the bulldozer shovel and improving the protective effect of the cover plate body.

[0016] In an optional embodiment, a first sleeve is fixedly provided in the through hole, and the connecting shaft is a bolt. The bolt passes through the first sleeve and is threadedly connected to the sleeve.

[0017] Beneficial effects: The utility model can reduce the wear of the connecting shaft on the fixing plate during the rotation process by arranging the first shaft sleeve in the through hole, thereby extending the service life of the fixing plate. In addition, using the bolt as the connecting shaft can improve the convenience of maintenance and replacement of parts, shorten the maintenance time, and reduce the maintenance cost; on the other hand, connecting the bolt with the sleeve can improve the connection strength and stability between the two.

[0018] In an optional embodiment, a pair of relatively arranged mounting plates are provided on one side of the cover body for connection with the frame body, a pin is provided on the mounting plate, and a second shaft sleeve is sleeved on the pin; a pair of arc-shaped slide grooves corresponding to the second shaft sleeve are provided on the frame body; the sliding connection between the cover body and the frame body is achieved by the sliding cooperation between the second shaft sleeve and the arc-shaped slide groove.

[0019] Beneficial effects: The utility model realizes the sliding connection between the cover body and the frame body through the sliding cooperation between the second sleeve and the arc-shaped slide groove, so that the cover body can adjust the relative position relationship with the frame body according to the state of the bulldozer, thereby improving the flexibility of the protective cover structure. In addition, by sleeve-arranging the second sleeve on the pin shaft, the sliding friction can be converted into rolling friction, reducing the friction loss between the pin shaft and the arc-shaped slide groove, and extending the service life of the parts.

[0020] In an optional embodiment, the mounting plate includes a mounting portion and an extension portion, the mounting portion is arranged on the inner surface of the cover plate body, the extension portion is connected to the mounting portion and extends toward the position where the arc-shaped slide groove is located; the pin shafts are respectively provided on the opposite side walls of a pair of the extension portions.

[0021] Beneficial effect: The utility model can set the extension part more stably on the cover body by setting the mounting part. Furthermore, by setting the extension part, not only can the cover body be slidably connected with the frame body through the pin shaft, but also the interference between the cover body and other structures such as the frame body during movement can be avoided.

[0022] In an optional embodiment, the inner surface of the cover plate body is provided with reinforcing ribs.

[0023] Beneficial effect: The utility model can increase the structural strength of the cover body itself, reduce the probability of deformation of the cover body during use, and extend the service life of the cover body by arranging reinforcing ribs on the inner surface of the cover body.

[0024] In a second aspect, the utility model further provides an operating machine, comprising:

[0025] The frame body;

[0026] A bulldozer blade connected to the vehicle frame body;

[0027] The protective cover plate structure is disposed above the oil cylinder of the bulldozer and is movably connected to the bulldozer and the frame body respectively.

[0028] Beneficial effects: The utility model can not only effectively protect the oil cylinder by arranging the above-mentioned protective cover plate structure above the oil cylinder of the bulldozer, but also enable the cover plate body to move with the bulldozer, thereby improving the coordination between the cover plate body and the bulldozer. In addition, a limit flexible cable is arranged between the cover plate body and the frame body, which can prevent the cover plate body from exceeding the preset movement range, thereby improving the safety of the operating machinery during construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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 creative work.

[0030] Figure 1 It is an exploded schematic diagram of a protective cover plate structure, a vehicle frame body and a bulldozer blade before being assembled according to an embodiment of the utility model;

[0031] Figure 2 This is a schematic structural diagram of a protective cover plate structure according to an embodiment of the utility model;

[0032] Figure 3 It is a schematic diagram of the protective cover structure, the vehicle frame body and the bulldozer blade after being assembled in the embodiment of the utility model;

[0033] Figure 4 for Figure 3 A schematic diagram from another perspective;

[0034] Figure 5 for Figure 3 A schematic diagram from another perspective;

[0035] Figure 6 A schematic diagram of the structure of a bulldozer according to an embodiment of the utility model;

[0036] Figure 7 The figure is a structural schematic diagram of a frame body according to an embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 1. Cover plate body; 101. Sleeve; 102. Mounting plate; 1021. Mounting portion; 1022. Extension portion; 103. Reinforcement rib; 104. Flanging; 2. Bulldozer; 201. Fixing plate; 2011. Through hole; 3. Frame body; 301. Arc-shaped slide groove; 4. Limiting flexible cable; 5. Locking piece; 6. Locking fitting; 7. Connecting shaft; 8. First bushing; 9. Pin; 10. Second bushing; 11. Connecting rod mechanism. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0040] Aiming at the problem that a protective cover plate may excessively move during the movement of a bulldozer, the utility model provides a protective cover plate structure and an operating machine.

[0041] Combine the following Figures 1 to 7 , describing an embodiment of the utility model.

[0042] According to an embodiment of the present utility model, on the one hand, as Figures 1 to 7 As shown, a protective cover plate structure is provided, which mainly includes: a cover plate body 1 and a limiting flexible cable 4.

[0043] Specifically, the cover body 1 is disposed above the oil cylinder of the bulldozer 2 and is movably connected to the bulldozer 2 and the frame body 3 respectively; the limiting flexible cable 4 is disposed between the cover body 1 and the frame body 3, and is used to limit the maximum moving position of the cover body 1 relative to the frame body 3.

[0044] The embodiment of the utility model flexibly connects the cover plate body 1 with the bulldozer 2 and the frame body 3, respectively, so that the cover plate body 1 can move with the bulldozer 2, so that the oil cylinder can always be protected by the cover plate body 1, reducing the probability of the oil cylinder being damaged by foreign objects. In addition, a limit flexible cable 4 is set between the cover plate body 1 and the frame body 3, which can prevent the cover plate body 1 from exceeding the preset range of movement, improve the safety of the operating machinery during the construction process, and solve the problem that the protective cover plate may move excessively during the movement of the bulldozer.

[0045] It should be noted that, in this embodiment, the maximum movement position of the cover body 1 relative to the frame body 3 refers to the position of the cover body 1 on the frame body 3 when the bulldozer 2 rises or falls to the maximum extent.

[0046] According to an embodiment of the present invention, the position-limiting flexible cable 4 is detachably connected to the cover plate body 1 , and / or the position-limiting flexible cable 4 is detachably connected to the frame body 3 .

[0047] The embodiment of the utility model adopts a detachable connection design, which is convenient for installing and disassembling the limit flexible cable 4 on the one hand; on the other hand, it is convenient to flexibly adjust the length of the limit flexible cable 4, so that the limit flexible cable 4 can better adapt to the needs of different working scenes. In addition, by adopting a detachable connection design, it will not interfere with the subsequent disassembly of the cover body 1, so it is convenient for the staff to regularly maintain the structure below the cover body 1, such as the oil cylinder and the pipelines matched with the oil cylinder.

[0048] It should be noted that the limit flexible rope 4 in this embodiment can be but not limited to a steel wire rope, a chain and a nylon rope. As long as it does not interfere with the cover body 1 during the normal operation of the bulldozer 2 and can also limit the maximum movement position of the cover body 1 relative to the frame body 3. This utility model does not make specific limitations on this.

[0049] In some embodiments, the position limiting flexible rope 4 can be a steel wire rope or a nylon rope, wherein two ends of the steel wire rope or the nylon rope are respectively tied to the frame body and the bulldozer 2.

[0050] In other embodiments, the position limiting flexible cable 4 may also be a steel wire rope or a chain, wherein one end of the steel wire rope or the chain is fixedly connected to the bulldozer 2 by, for example, welding, and the other end is directly tied to the frame body 3 .

[0051] According to an embodiment of the present invention, a locking member 5 is provided on the position-limiting flexible cable 4 , and a locking matching member 6 matching with the locking member 5 is provided on the cover body 1 and / or the frame body 3 .

[0052] The embodiment of the utility model provides a locking member 5 and a matching locking member 6, which not only allows the limiting flexible cable 4 to limit the maximum moving position of the cover body 1 relative to the frame body 3, but also realizes a detachable connection between the limiting flexible cable 4 and the cover body 1 and / or the frame body 3, thereby simplifying the installation and disassembly operations between the limiting flexible cable 4 and the cover body 1, and between the limiting flexible cable 4 and the frame body 3.

[0053] According to an embodiment of the present invention, the locking member 5 is a lock buckle, and the locking fitting member 6 is a lifting ring. The embodiment of the present invention can realize a detachable connection between the limit flexible cable 4 and the frame body 3 and / or the cover body 1 through the cooperation of the lock buckle and the lifting ring. In addition, the structure of the lock buckle and the lifting ring is relatively simple, so it is convenient to operate and the subsequent maintenance and replacement cost is low. It is understandable that the locking member 5 can also be a buckle, and the present invention does not make specific limitations on this.

[0054] It should be noted that the locking fitting 6 can also be arranged on the limit flexible cable 4. Similarly, the locking fitting 5 can also be arranged on the frame body 3 and the bulldozer 2. The following takes the lock buckle and the lifting ring as an example to illustrate some of the arrangement forms of the locking fitting 5 and the locking fitting 6.

[0055] Example 1:

[0056] Both ends of the position-limiting flexible rope 4 are provided with lifting rings respectively, and the positions of the frame body 3 and the bulldozer blade 2 for connecting with the position-limiting flexible rope 4 are provided with locking buckles.

[0057] Example 2:

[0058] A lifting ring is provided at one end of the limiting flexible cable 4, and a locking buckle is provided at the other end; a locking buckle is provided at the position where the frame body 3 is used to connect with the lifting ring on the limiting flexible cable 4, and a lifting ring is provided at the position where the bulldozer 2 is used to connect with the locking buckle on the limiting flexible cable 4.

[0059] Example 3:

[0060] A lock is provided at one end of the position limiting flexible cable 4, a lifting ring is provided at a position of the frame body 3 for connecting with the lock on the position limiting flexible cable 4, and the bulldozer 2 is fixedly connected to the other end of the position limiting flexible cable 4, for example, by welding.

[0061] According to one embodiment of the utility model, a sleeve 101 is provided on one side of the cover body 1 for connecting to the bulldozer 2, a fixing plate 201 is provided on the bulldozer 2, a through hole 2011 is provided on the fixing plate 201 which is coaxial with the sleeve 101, and a connecting shaft 7 is passed through the through hole 2011 and the sleeve 101 to realize the rotational connection between the cover body 1 and the bulldozer 2.

[0062] The embodiment of the utility model realizes the rotational connection between the cover plate body 1 and the bulldozer 2 through the fixing plate 201, the through hole 2011, the sleeve 101 and the connecting shaft 7, so that the cover plate body 1 can rotate with the bulldozer 2, thereby ensuring the coordination between the cover plate body 1 and the bulldozer 2 and improving the protective effect of the cover plate body 1.

[0063] It should be noted that the number of the fixing plates 201 in this embodiment can be one or more, which will be described below with reference to specific examples.

[0064] In one example, there is one fixing plate 201 on the bulldozer blade 2. Specifically, in order to ensure the stability of the cover body and the bulldozer blade 2 during rotation, the fixing plate 201 can be disposed near the middle area of ​​one side of the cover body 1 for connecting with the bulldozer blade 2.

[0065] In another example, there are two fixing plates 201 on the bulldozer blade 2. Specifically, the two fixing plates 201 are arranged at intervals on opposite sides of the cover body 1 along the length direction of the bulldozer blade 2. Such arrangement can, on the one hand, make the cover body 1 evenly stressed, reduce the possibility of deformation of the cover body 1, and extend the service life; on the other hand, it can ensure the smoothness of the rotation of the cover body 1.

[0066] According to an embodiment of the utility model, a first sleeve 8 is fixedly disposed in the through hole 2011 , and the connecting shaft 7 is a bolt, which passes through the first sleeve 8 and is threadedly connected to the sleeve 101 .

[0067] The embodiment of the utility model can reduce the wear of the connecting shaft 7 on the fixing plate 201 during the rotation process by arranging the first shaft sleeve 8 in the through hole 2011, thereby extending the service life of the fixing plate 201. In addition, using bolts as the connecting shaft 7 can improve the convenience of maintenance and replacement of parts, shorten maintenance time, and reduce maintenance costs; on the other hand, connecting with the sleeve 101 through bolts can improve the connection strength and stability between the two.

[0068] According to one embodiment of the utility model, a pair of relatively arranged mounting plates 102 are provided on one side of the cover body 1 for connecting with the frame body 3, a pin shaft 9 is provided on the mounting plate 102, and a second shaft sleeve 10 is sleeved on the pin shaft 9; a pair of arc-shaped slide grooves 301 corresponding to the second shaft sleeve 10 are provided on the frame body 3; the sliding connection between the cover body 1 and the frame body 3 is realized by the sliding cooperation between the second shaft sleeve 10 and the arc-shaped slide groove 301.

[0069] The embodiment of the utility model realizes the sliding connection between the cover body 1 and the frame body 3 through the sliding cooperation between the second sleeve 10 and the arc-shaped slide groove 301, so that the cover body 1 can adjust the relative position relationship with the frame body 3 according to the state of the bulldozer 2, thereby improving the flexibility of the protective cover structure. In addition, by sleeve-arranging the second sleeve 10 on the pin 9, the sliding friction can be converted into rolling friction, reducing the friction loss between the pin 9 and the arc-shaped slide groove 301, and extending the service life of the parts.

[0070] It should be noted that the number of the mounting plates 102 in this embodiment can be one or more. This will be described below with reference to specific examples.

[0071] In one example, there is one mounting plate 102 on the frame body 3. Specifically, in order to ensure the stability of the cover body and the frame body 3 during sliding, the mounting plate 102 can be arranged near the middle area of ​​one side of the cover body 1 for connecting to the frame body 3.

[0072] In another example, there are two mounting plates 102 on the frame body 3. Specifically, the two mounting plates 102 are arranged side by side near the middle area of ​​one side of the cover body 1 for connecting to the frame body 3, so that the stability between the cover body and the frame body 3 during the sliding process can be improved.

[0073] In another example, there are two mounting plates 102 on the frame body 3. Specifically, the two mounting plates 102 are spaced apart on opposite sides of the cover body 1 along the length direction of the bulldozer 2. Such a configuration can, on the one hand, make the cover body 1 evenly stressed, reduce the possibility of deformation of the cover body 1, and extend the service life; on the other hand, it can ensure the sliding smoothness of the cover body 1.

[0074] It should be noted that the present embodiment does not limit the nature or specific structure of the arc-shaped slide groove 301, as long as it can be slidably matched with the second shaft sleeve 10. In addition, the setting position of the arc-shaped slide groove 301 can be set near the middle area of ​​one side of the cover body 1 for connecting the frame body 3, or can be set near the areas on the opposite sides of the cover body 1 along the length direction of the bulldozer 2, as long as it corresponds to the position of the mounting plate 102.

[0075] In a specific embodiment, the shape of the arc-shaped slide groove 301 can be a U-shaped plate. In this way, the side wall of the U-shaped plate can be used to limit the running track of the second sleeve 10 to prevent the second sleeve 10 from falling off the arc-shaped slide groove 301. It can be understood that in this embodiment, the second sleeve 10 is directly overlapped on the U-shaped plate, so when it is necessary to maintain the oil cylinder and the pipeline used in conjunction with the oil cylinder, it is only necessary to remove the limit flexible cable 4 and then rotate the cover plate body 1 in a direction away from the frame body.

[0076] In an embodiment not shown, the arc-shaped slide groove 301 is an arc-shaped groove, and the second sleeve 10 extends into the interior of the arc-shaped groove through the pin 9 and is slidably connected to the arc-shaped groove. In this way, the running track of the second sleeve 10 can also be limited by the groove wall of the arc-shaped groove.

[0077] According to one embodiment of the utility model, the mounting plate 102 includes a mounting portion 1021 and an extension portion 1022. The mounting portion 1021 is arranged on the inner surface of the cover body 1, and the extension portion 1022 is connected to the mounting portion 1021 and extends toward the position where the arc-shaped slide groove 301 is located; a pair of pin shafts 9 are respectively provided on the opposite side walls of the extension portions 1022.

[0078] The embodiment of the utility model can make the extension part 1022 more stably arranged on the cover body 1 by providing the mounting part 1021. Furthermore, by providing the extension part 1022, not only can the cover body 1 be slidably connected with the frame body 3 through the pin 9, but also can avoid interference between the cover body 1 and other structures such as the frame body 3 during movement.

[0079] In a specific embodiment, one end of the mounting portion 1021 is connected to the sleeve 101, and the other end is connected to one side of the cover body 1 for connecting to the frame body 3. Such an arrangement can improve the rigidity and structural strength of the cover body 1.

[0080] According to an embodiment of the present invention, the inner surface of the cover body 1 is provided with reinforcing ribs 103. By providing reinforcing ribs 103 on the inner surface of the cover body 1, the present embodiment of the present invention can increase the structural strength of the cover body 1, reduce the probability of deformation of the cover body 1 during use, and extend the service life of the cover body 1.

[0081] In a specific embodiment, a plurality of reinforcing ribs 103 are disposed on the inner surface of the cover body 1 at intervals along the length direction of the bulldozer blade 2 ; or are disposed on the inner surface of the cover body 1 at intervals along a direction perpendicular to the length direction of the bulldozer blade 2 .

[0082] In addition, in order to further increase the rigidity and strength of the cover body 1 , a flange 104 may be provided on at least one side of the inner surface of the cover body 1 .

[0083] According to an embodiment of the present utility model, on the other hand, a working machine is provided, including: a frame body 3, a bulldozer 2 and the above-mentioned protective cover structure.

[0084] Specifically, the bulldozer blade 2 is connected to the vehicle frame body 3; the above-mentioned protective cover plate structure is disposed above the oil cylinder of the bulldozer blade 2, and is movably connected to the bulldozer blade 2 and the vehicle frame body 3 respectively.

[0085] The embodiment of the utility model can not only effectively protect the oil cylinder by arranging the above-mentioned protective cover plate structure above the oil cylinder of the bulldozer 2, but also can make the cover plate body 1 move with the bulldozer 2, thereby improving the coordination between the cover plate body 1 and the bulldozer 2. In addition, a limit flexible cable 4 is arranged between the cover plate body 1 and the frame body 3, which can prevent the cover plate body 1 from exceeding the preset movement range, thereby improving the safety of the operating machine during construction operations.

[0086] In a specific embodiment, a connecting rod mechanism 11 is provided between the bulldozer 2 and the vehicle frame body 3. It is understandable that the oil cylinder of the bulldozer 2 can also be provided between the bulldozer 2 and the vehicle frame body 3 and spaced apart from the connecting rod mechanism 11.

[0087] It should be noted that the working machine in this embodiment may be, but is not limited to, a wheeled excavator provided with a bulldozer 2 , a crawler excavator provided with a bulldozer 2 , a bulldozer, and other working machines.

[0088] Although the embodiments of the present invention are described in conjunction with 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 are all within the scope defined by the appended claims.

Claims

1. A protective cover plate structure, characterized in that: include: The cover plate body (1) is arranged above the oil cylinder of the bulldozer (2) and is movably connected to the bulldozer (2) and the frame body (3); A limit flexible cable (4) is arranged between the cover plate body (1) and the vehicle frame body (3) and is used to limit the maximum movable position of the cover plate body (1) relative to the vehicle frame body (3).

2. The protective cover structure according to claim 1, characterized in that: The position-limiting flexible cable (4) is detachably connected to the cover plate body (1), and / or the position-limiting flexible cable (4) is detachably connected to the vehicle frame body (3).

3. The protective cover structure according to claim 2, characterized in that: The position-limiting flexible cable (4) is provided with a locking piece (5), and the cover plate body (1) and / or the frame body (3) are provided with a locking matching piece (6) matching with the locking piece (5).

4. The protective cover structure according to claim 3, characterized in that: The locking piece (5) is a lock buckle, and the locking matching piece (6) is a lifting ring.

5. The protective cover structure according to any one of claims 1 to 4, characterized in that: The cover plate body (1) is provided with a sleeve (101) on one side thereof for connecting to a bulldozer (2); a fixing plate (201) is provided on the bulldozer (2); a through hole (2011) is provided on the fixing plate (201) and is coaxially arranged with the sleeve (101); and a connecting shaft (7) is inserted through the through hole (2011) and the sleeve (101) to realize rotational connection between the cover plate body (1) and the bulldozer (2).

6. The protective cover structure according to claim 5, characterized in that: A first shaft sleeve (8) is fixedly disposed in the through hole (2011); the connecting shaft (7) is a bolt, and the bolt passes through the first shaft sleeve (8) and is threadedly connected to the sleeve (101).

7. The protective cover structure according to any one of claims 1 to 4, characterized in that: A pair of mounting plates (102) arranged opposite to each other are provided on one side of the cover plate body (1) for connecting with the frame body (3); a pin shaft (9) is provided on the mounting plate (102); a second shaft sleeve (10) is sleeved on the pin shaft (9); a pair of arc-shaped sliding grooves (301) corresponding to the second shaft sleeve (10) are provided on the frame body (3); and the sliding connection between the cover plate body (1) and the frame body (3) is achieved by the sliding cooperation between the second shaft sleeve (10) and the arc-shaped sliding groove (301).

8. The protective cover structure according to claim 7, characterized in that: The mounting plate (102) comprises a mounting portion (1021) and an extension portion (1022); the mounting portion (1021) is arranged on the inner surface of the cover plate body (1); the extension portion (1022) is connected to the mounting portion (1021) and extends toward the position where the arc-shaped slide groove (301) is located; and the pin shafts (9) are respectively arranged on opposite side walls of a pair of the extension portions (1022).

9. The protective cover structure according to any one of claims 1 to 4, characterized in that: The inner surface of the cover plate body (1) is provided with reinforcing ribs (103).

10. A working machine, characterized in that: include: Frame body (3); A bulldozer (2) connected to the vehicle frame body (3); The protective cover structure described in any one of claims 1 to 9 is arranged above the oil cylinder of the bulldozer (2) and is movably connected to the bulldozer (2) and the frame body (3) respectively.

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