Dust screen device for cooling bag of operation machine and operation machine

Abstract

The utility model relates to a dustproof net device for a cooling bag of an operation machine and the operation machine comprising the dustproof net device. The dustproof net device comprises a frame, a locking structure and a flexible dustproof net. The frame includes a plurality of frame sections arranged in a frame plane, adjacent frame sections being hinged to each other such that the frame is switchable within the frame plane between an unfolded state and a folded state. And the locking structure is arranged at a connecting part between at least one part of two adjacent frame sections so as to lock the frame in the unfolding state. And the dustproof net is connected with each frame part section. The dustproof net device can be conveniently taken out from gaps among a plurality of devices arranged on the air inlet side of the cooling bag in a folded state.

Description

Technical Field

[0001] This utility model relates to the technical field of components for operating machinery, and in particular to a dustproof net device for a cooling pack of operating machinery and operating machinery including the dustproof net device. Background Technology

[0002] In the design of cooling packs for operational machinery such as hydraulic excavators, road rollers, and loaders, airflow is typically generated by a fan and delivered to the radiator core. To prevent dust, lint, small insects, and other debris from clogging the airflow channels of the radiator core, the cooling pack usually has a dust filter on its air intake side. This dust filter needs to be cleaned regularly.

[0003] Currently, there are generally two methods for installing dust filters. One method involves welding wire mesh to an iron frame and then connecting it to the cooling pack frame. The other method involves securing the flexible mesh around its perimeter with a wire frame before installing it onto the cooling pack. The air intake side of the cooling pack typically houses equipment such as condensers and battery packs, making the space on that side quite confined. Both of these methods make it inconvenient to disassemble the dust filters within such a limited space. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the above-mentioned problems and / or other problems existing in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a dustproof net device for a cooling pack of working machinery is provided. The dustproof net device includes a frame, a locking structure, and a flexible dustproof net. The frame includes multiple frame segments arranged in a frame plane, with adjacent frame segments hinged to each other, allowing the frame to switch between an unfolded state and a folded state within the frame plane. The locking structure is disposed at at least a portion of the connection between two adjacent frame segments to lock the frame in the unfolded state. The dustproof net is connected to each of the frame segments.

[0006] According to one embodiment of the present invention, the plurality of frame segments include a first segment, a second segment, a third segment, a fourth segment, a fifth segment, and a sixth segment. The first segment to the sixth segment are connected end to end in sequence to form six connecting parts of the frame. In the unfolded state of the frame, at least four of the connecting parts are locked by the locking structure.

[0007] According to one embodiment of the present invention, the at least four connecting portions include a first connecting portion between the first segment and the sixth segment, wherein the ends of the first segment and the sixth segment that are close to each other have a first bending portion formed by bending from the main body of the corresponding segment, and each first bending portion is provided with a first through hole for installing the locking structure. In the unfolded state of the frame, the first through holes on the two first bending portions are aligned with each other.

[0008] According to one embodiment of the present invention, the at least four connecting portions include a second connecting portion between the third segment and the fourth segment, wherein the ends of the third segment and the fourth segment that are close to each other have a second bending portion formed by bending from the main body of the corresponding segment, and each second bending portion is provided with a second through hole for installing the locking structure. In the unfolded state of the frame, the second through holes on the two second bending portions are aligned with each other.

[0009] According to one embodiment of the present invention, the at least four connecting portions include a third connecting portion between the fourth segment and the fifth segment, wherein the end of the fifth segment near the fourth segment is provided with a third bending portion formed by bending from the main body portion, and the third bending portion and the end of the fourth segment near the fifth segment are respectively provided with a third through hole for installing the locking structure. In the unfolded state of the frame, the third bending portion and the third through hole on the fourth segment are aligned with each other.

[0010] According to one embodiment of the present invention, the at least four connecting portions include a fourth connecting portion between the fifth segment and the sixth segment, wherein the end of the fifth segment near the sixth segment is provided with a fourth bent portion formed by bending from the main body portion, and the fourth bent portion and the end of the sixth segment near the fifth segment are respectively provided with a fourth through hole for installing the locking structure. In the unfolded state of the frame, the fourth bent portion and the fourth through hole on the sixth segment are aligned with each other.

[0011] According to one embodiment of the present invention, the dustproof net includes a frame and a mesh body. The frame includes a peripheral portion connected to the mesh body and the frame segment, and an intermediate portion that divides the mesh body into a first portion and a second portion and is connected to the two portions.

[0012] According to one embodiment of the present invention, the skeleton and / or the mesh body are made of nylon material.

[0013] According to one embodiment of the present invention, the locking structure includes a locking pin with a lock hole and a pin that can be inserted into the lock hole. The locking pin passes through through holes corresponding to two adjacent frame sections in the unfolded state of the frame.

[0014] According to another aspect of the present invention, there is a working machine comprising a cooling pack and a dustproof net device for the cooling pack as described above.

[0015] According to the dustproof net device of this utility model, by setting the frame to be composed of multiple frame segments, and the adjacent frame segments are hinged to each other so that the frame can switch between an unfolded state and a folded state within the frame plane, it is convenient to take out the dustproof net device in a folded state from the gap between multiple devices set on the air inlet side of the cooling pack. Attached Figure Description

[0016] The features and advantages of this utility model will become clear from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on this utility model, wherein:

[0017] Figure 1 A perspective view of a dustproof mesh device installed on a cooling pack frame according to an embodiment of the present invention is shown.

[0018] Figure 2 Show Figure 1 An exploded view of the dustproof netting device shown.

[0019] Figure 3 Show Figure 1 A three-dimensional view of the dustproof netting device shown.

[0020] Figure 4 Show Figure 3 An enlarged view of point A of the dustproof netting device shown.

[0021] Figure 5 Show Figure 3 An enlarged view of point B of the dustproof netting device shown.

[0022] Figure 6 Show Figure 3 Enlarged view of point C of the dustproof netting device shown.

[0023] Figure 7 Show Figure 3 An enlarged view of point D of the dustproof netting device shown.

[0024] Figure 8 The frame of the dustproof netting device is shown in its folded state.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Frame; 11. Frame segment; 111. First segment; 112. Second segment; 113. Third segment; 114. Fourth segment; 115. Fifth segment; 116. Sixth segment; 121, 121'. First bend; 122, 122'. First through hole; 131, 131'. Second bend; 132, 132'. Second through hole; 141. Third bend; 142, 142'. Third through hole; 151. Fourth bend; 152, 152', fourth through hole; 161, first hinge point; 162, second hinge point; 163, third hinge point; 164, fourth hinge point; 165, fifth hinge point; 166, sixth hinge point; 2. Locking structure; 21, locking pin; 22, latch; 3. Dustproof net; 31, frame; 311, clearance part; 32, mesh body; 321, first part; 322, second part; 4. Cooling pack frame. Detailed Implementation

[0027] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0028] The terms "first" and "second" are used below to describe the elements of this application. These terms are used only to distinguish the individual elements and not to limit the nature, order, or number of these elements. The terms "comprising" and "having" are used to indicate an open-ended inclusion and mean that there may be additional elements / components besides those listed.

[0029] Figure 1 The installation state of a dustproof net device according to an embodiment of the present invention is shown. The dustproof net device according to this embodiment can be applied to a cooling pack of operating machinery, which may include a radiator core (not shown) and, for example... Figure 1 The cooling pack frame 4 is shown. The radiator core may be generally cuboid and has internal channels for the flow of coolant (e.g., cooling water). The cooling pack frame 4 includes at least the following: Figure 1The two opposing frame sections shown are the upper frame section and the lower frame section, to which the upper and lower sides of the radiator core are respectively fixed. If necessary, the cooling pack frame 4 may also include components located at... Figure 1 The other two frame sections on the left and right sides. In addition to the radiator core, the space between the cooling package frames 4 can also be used to install other equipment, such as intercoolers, oil coolers, etc. Figure 1 The image only schematically shows one dust filter device installed on the outside of the radiator core, but two or more dust filter devices may also be installed side by side between the upper frame and the lower frame.

[0030] The dustproof netting device according to this embodiment includes a frame 1, a locking structure 2, and a flexible dustproof netting 3. Figure 1 In the installed state shown, frame 1 has a shape that roughly corresponds to the radiator core, typically rectangular. Locking structure 2 can lock frame 1 in the installed state. After removing locking structure 2 from frame 1, frame 1 can be deformed, compressed, or folded to facilitate the installation or removal of the dust filter from the confined space on the air intake side of the cooling pack. Dust filter 3 is attached to frame 1.

[0031] In this embodiment, as Figure 1 As shown, the upper frame of the cooling pack frame 4 is provided with two hooks 41, on which the tops of the frame 1 and the dustproof net 3 can be hung. The lower frame of the cooling pack frame 4 is provided with two limiting posts 42, which are used to limit the movement of the bottom of the frame 1 and the dustproof net 3.

[0032] Figure 2 and Figure 3 A dustproof net device 3 according to an embodiment of the present invention is shown. Figures 4 to 7 They are shown respectively Figure 3 Enlarged views of points A, B, C, and D in the image. Figure 8 An example of the folded state of frame 1 is shown.

[0033] like Figure 2 As shown, the frame 1 may include multiple frame segments 11 arranged in the frame plane. Adjacent frame segments 11 are hinged to each other, allowing the frame 1 to be positioned within the frame plane. Figure 2 The unfolded state shown is the same as Figure 8 The folding states shown are switched. In this embodiment, the plurality of frame segments 11 may include, for example, Figure 2The first segment 111, the second segment 112, the third segment 113, the fourth segment 114, the fifth segment 115, and the sixth segment 116 are shown as connected end to end. The first segment 111 and the sixth segment 116 constitute the left part of the frame 1, the second segment 112 constitutes the upper part of the frame 1, the third segment 113 and the fourth segment 114 constitute the right part of the frame 1, and the fifth segment 115 constitutes the lower part of the frame 1.

[0034] Continue to refer to Figure 2 and Figure 3 As shown, the dustproof net 3 may include a frame 31 and a mesh body 32 (the grid lines constituting the mesh body are omitted in the figure). The frame 31 includes a peripheral portion connected to the mesh body 32 and a middle portion dividing the mesh body 32 into a first portion 321 and a second portion 322. The first portion 321 and the second portion 322 of the mesh body 32 are both generally rectangular and connected via the middle portion of the frame 31.

[0035] In this embodiment, the mesh body 32 can be made of nylon mesh, while the peripheral portion of the skeleton 31 can be constructed as a nylon sleeve. Before the multiple frame segments 11 are hinged to form a closed frame 1, the upper left, top, and upper right portions of the skeleton 31 can be fitted onto the first segment 111, the second segment 112, and the third segment 113 of the frame 1, respectively, while the lower left, bottom, and lower right portions of the skeleton 31 can be fitted onto the sixth segment 116, the fifth segment 115, and the fourth segment 114 of the frame 1, respectively. The middle portion of the skeleton 31 can be a flat nylon fabric and does not need to be constructed as a sleeve. In another embodiment, the peripheral portion of the skeleton 31 can also be connected to the various frame segments 11 of the frame 1 by edge stitching. It is understood that the materials used to construct the skeleton 31 and the mesh body 32 are not limited to nylon and can also be other suitable flexible materials. In addition, through holes for the hook 41 and the limiting post 42 to pass through are provided on the upper and lower sides of the skeleton 31, respectively.

[0036] Continue to refer to Figure 3 As shown, the six frame segments 11 of frame 1 are connected end-to-end to form six connecting parts located at the upper left, middle left, lower left, upper right, middle right, and lower right of frame 1, respectively. At least four of these six connecting parts are locked via locking structure 2, thus locking frame 1 in place as shown. Figures 1 to 3 The unfolded state is shown. Since the two connecting parts at the top left and top right are relatively high, it is preferable to place the locking structure 2 on the remaining four connecting parts.

[0037] Figure 4 The first connecting portion between the first segment 111 and the sixth segment 116 is shown in detail. (Combined) Figures 2 to 4As shown, the main bodies of the first segment 111 and the sixth segment 116 are both straight rods. The adjacent ends of the first segment 111 and the sixth segment 116 each have first bent portions 121 and 121' formed by bending from the main body of the respective segment toward the inside of the frame 1. The first bent portions 121 and 121' of the first segment 111 and the second segment 116 are respectively provided with first through holes 122 and 122' for mounting the locking structure 2, as shown. Figure 8 As shown. In the unfolded state of frame 1, the two first bends 121, 121' overlap each other in a direction perpendicular to the frame plane, and the first through holes 122, 122' on the two first bends 121, 121' are aligned with each other. The first segment 111 and the sixth segment 116 are rotatably hinged to each other at the first hinge point 161 by rivets or pins. The first hinge point 161 may be provided on the two first bends 121, 121'.

[0038] Figure 5 The second connecting portion between the third segment 113 and the fourth segment 114 is shown in detail. (Combined) Figure 2 , Figure 3 and Figure 5 As shown, the main bodies of the third segment 113 and the fourth segment 114 are both straight rods. The adjacent ends of the third segment 113 and the fourth segment 114 each have second bent portions 131 and 131' formed by bending from the main body of the respective segment toward the inside of the frame 1. Each of the second bent portions 131 and 131' of the third segment 113 and the fourth segment 114 has a second through hole 132 and 132' for mounting the locking structure 2, as shown. Figure 8 As shown. In the unfolded state of frame 1, the two second bends 131, 131' overlap each other in a direction perpendicular to the frame plane, and the second through holes 132, 132' on the two second bends 131, 131' are aligned with each other. The third segment 113 and the fourth segment 114 are rotatably hinged to each other at the second hinge point 162 by rivets or pins. The second hinge point 162 may be provided on the two second bends 131, 131'.

[0039] Figure 6 The third connecting section between the fourth segment 114 and the fifth segment 115 is shown in detail. (Combined) Figure 2 , Figure 3 and Figure 6 As shown, the fifth segment 115, near the right end of the fourth segment 114, has a third bend 141 formed by bending upwards from its main body. The third bend 141 and the end of the fourth segment 114 near the fifth segment 115 each have third through holes 142 and 142' for mounting the locking structure 2, as shown. Figure 8As shown. In the unfolded state of frame 1, the ends of the third bend 141 and the fourth segment 114 near the fifth segment 115 overlap each other in a direction perpendicular to the frame plane, and the third through holes 142 and 142' on both are aligned with each other. The fourth segment 114 and the fifth segment 115 are rotatably hinged to each other at the third hinge point 163 by rivets or pins.

[0040] Figure 7 The fourth connecting section between the fifth segment 115 and the sixth segment 116 is shown in detail. (Combined) Figure 2 , Figure 3 and Figure 7 As shown, a fourth bend 151, formed by bending upwards from its main body, is provided at the left end of the fifth segment 115 near the sixth segment 116. Fourth through holes 152 and 152' for mounting the locking structure 2 are respectively provided on the fourth bend 151 and the end of the sixth segment 116 near the fifth segment 115. Figure 8 As shown. In the unfolded state of frame 1, the ends of the fourth bend 151 and the sixth segment 116 near the fifth segment 115 overlap each other in a direction perpendicular to the frame plane, and the fourth through holes 152 and 152' on both are aligned with each other. The fifth segment 115 and the sixth segment 116 are rotatably hinged to each other at the fourth hinge point 164 by rivets or pins.

[0041] In addition, combined Figure 2 , Figure 3 and Figure 8 As shown, the first segment 111 and the second segment 112 are rotatably hinged to each other at the fifth hinge point 165 by rivets or pins, and the second segment 112 and the third segment 113 are rotatably hinged to each other at the sixth hinge point 166 by rivets or pins. In this embodiment, neither the fifth connecting portion including the fifth hinge point 165 nor the sixth connecting portion including the sixth hinge point 166 is provided with a locking structure. However, if the upper mounting position of the cooling pack is not very high, locking structures can be provided at the fifth and sixth connecting portions. Those skilled in the art will understand that it is sufficient to lock the frame 1 composed of the six frame segments 11 in the unfolded state by providing locking structures at only four of the six connecting portions.

[0042] refer to Figures 4 to 7As shown, the locking structure 2 may include a locking pin 21 and a latch 22. The locking pin 21 has a flange-like head and a generally cylindrical body, with a lock hole on the side of the body opposite to the head. The cross-sectional shape and size of the body of the locking pin 21 are adapted to the shape and size of the first through holes 122, 122', the second through holes 132, 132', the third through holes 142, 142', and the fourth through holes 152, 152', respectively (the size of the body may be slightly smaller than the size of the through holes), while the size of the head is larger than the through holes. The latch 22 can be inserted into the lock hole and is not easily dislodged. The latch 22 may be provided with a pull ring to facilitate removal of the latch from the lock hole.

[0043] The frame 31 may be provided with clearance portions 311 at positions corresponding to the connection points of two adjacent frame segments. For example, Figure 4 The clearance portion 311 shown, which is provided at the position corresponding to the two first bends 121, 121', is exemplarily represented as a "V"-shaped recess; Figure 6 The clearance portion 311 shown, located at the position corresponding to the third bend 141, is exemplarily represented as an angular recess. These clearance portions 311 prevent the skeleton 31 from affecting the folding of the frame 1 or the insertion and removal of the locking pin 21.

[0044] refer to Figures 1 to 3 and Figure 8 As shown, the fifth segment 115 of frame 1 can be integrally formed with two U-shaped feet protruding downwards from the second segment 112. Correspondingly, a pair of positioning slots can be provided on the lower frame portion of the cooling pack frame 4. Each positioning slot is composed of two protrusions extending horizontally from the front side of the lower frame portion, and the two protrusions are provided with corresponding fixing holes. The U-shaped feet of frame 1 can be locked between the corresponding two protrusions to prevent vertical displacement of the dust filter device 3. A stop pin with a similar structure to the pin 22 of the locking structure 2 can pass through the two opposing fixing holes to prevent the U-shaped feet from moving outwards, thereby preventing horizontal displacement of the dust filter device 3.

[0045] This utility model also provides a working machine that includes the above-mentioned dustproof net device.

[0046] Industrial applicability

[0047] The dustproof net device of this invention can be applied to various types of machinery with cooling packs, such as hydraulic excavators, road rollers, and loaders. The dustproof net device is generally placed on the air intake side of the cooling pack to prevent the fan from sucking debris into the radiator core of the cooling pack during operation, thus preventing blockage of the airflow channels and reducing the heat exchange capacity of the radiator core. The dustproof net device of this invention is particularly suitable for machinery where batteries, condensers, or other components are also installed on the air intake side of the cooling pack, which could hinder the removal of the dustproof net device. Of course, the dustproof net device of this invention can also be used in other equipment that requires dust filtration of the intake air.

[0048] The following is combined with Figures 1 to 8 The illustrated embodiment provides a detailed description of the installation process of the dustproof net device.

[0049] First, after connecting the dustproof net 3 (more specifically, the peripheral portion of its frame 31) to the various frame segments 11 of the frame 1 (as previously mentioned, this can be done by interlocking or edge stitching), the first bends 121, 121' and the second bends 131, 131' of the frame 1 are pulled closer together, thereby causing the sixth segment 116 to rotate about the fourth hinge point 164 relative to the fifth segment 115, and the fourth segment 114 to rotate about the third hinge point 163 relative to the fifth segment 115. Simultaneously, the first segment 111 (which rotates relative to the second segment 112 and the sixth segment 116) and the third segment 113 (which rotates relative to the second segment 112 and the fourth segment 114) cause the second segment 112 to move closer to the fifth segment 115, thus positioning the frame 1 in a position... Figure 8 The folded state shown reduces the coverage area of ​​the dustproof netting device.

[0050] With the frame 1 in a folded state, the frame 1, together with the dustproof net 3, is sent from the gap between the devices located on the air inlet side of the cooling pack to the air inlet side of the cooling pack.

[0051] Next, hang the through holes on the second section 112 of frame 1 and the upper skeleton 31 of dustproof net 3 onto the corresponding hooks 41 on the cooling pack frame 4. Pull down the fifth section 115 of frame 1 to deform frame 1 as follows. Figure 3 The unfolded state shown.

[0052] Then, the locking pins 21 of the four locking structures 2 are respectively installed at the four connecting parts. For example... Figures 4 to 7 As shown, the locking pin 21 passes through the through hole on the corresponding frame section and then protrudes into the lock hole, through which the latch 22 passes.

[0053] Finally, the through holes on the lower frame 31 of the dust filter 3 are aligned with the corresponding limiting posts 42 on the cooler frame 4, so that the main body of the fifth section 115 of the frame 1 abuts against the lower side of the limiting posts 42 and the cooler frame 4. The U-shaped feet of the fifth section 115 are inserted between the two protrusions forming the positioning slots, and the stop pins pass through the fixing holes on the two protrusions. This fixes the dust filter device to the cooler frame 4.

[0054] When the dust screen device needs to be disassembled and cleaned, the stop pin can be removed first, allowing the U-shaped foot of the fifth section 115 to be removed from between the two protrusions, and the through hole on the lower frame 31 to disengage from the limiting post 42. After pulling the lower part of the frame 1 away from the cooler frame 4, the upper part of the frame 1, along with the dust screen 3, can be removed from the hook 41 of the cooler frame 4.

[0055] Next, remove the multiple pins 22 from frame 1 and pull the locking pins 21 away from frame 1. As described above, pull the first bends 121, 121' and the second bends 131, 131' of frame 1 closer together, and switch frame 1 to... Figure 8 The frame 1 is in the folded state shown. With the frame 1 in the folded state, the frame 1, together with the dustproof net 3, is pulled out from the gap between the equipment located on the air inlet side of the cooling pack to complete the disassembly process of the dustproof net device.

[0056] Existing dust screens are typically rigid frame structures, making them difficult to remove when multiple devices such as condensers and battery packs are located on the front side of the cooling pack. In contrast, the dust screen device of this invention configures the frame 1 as a plurality of frame segments 11, with adjacent frame segments 11 hinged together so that the frame 1 can switch between an unfolded and folded state within the frame plane. This facilitates the removal of the dust screen device in a folded state from the gaps between the multiple devices located on the air inlet side of the cooling pack.

[0057] Various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of this invention. Other embodiments of this invention will be apparent to those skilled in the art based on the practice of this invention disclosed in this specification. This specification and the examples disclosed herein should be considered illustrative only, and the true scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A dust screen device for a cooling pack of a work machine, characterized by, The dust screen device comprises: a frame (1) comprising a plurality of frame sections (11) arranged in a frame plane, adjacent frame sections being hingedly connected to each other so that the frame can be switched between an unfolded state and a folded state within the frame plane; a locking structure (2) provided at a connection between at least two adjacent frame sections to lock the frame in the unfolded state; and a flexible dust screen (3) connected with each frame section.

2. The dust screen device of claim 1, wherein, The plurality of frame sections (11) comprises a first section (111), a second section (112), a third section (113), a fourth section (114), a fifth section (115) and a sixth section (116), which are sequentially connected end to end to constitute six connections of the frame (1), and at least four of the connections are locked via the locking structure (2) in the unfolded state of the frame (1).

3. The dust screen device of claim 2, wherein, The at least four connections comprise a first connection between the first section (111) and the sixth section (116), wherein the end portions of the first section (111) and the sixth section (116) close to each other respectively have a first bent portion (121, 121') bent from the main body portion of the corresponding section, and each first bent portion is provided with a first through hole (122, 122') for mounting the locking structure (2), and the first through holes on the two first bent portions are aligned with each other in the unfolded state of the frame (1).

4. The dust screen device of claim 2, wherein, The at least four connections comprise a second connection between the third section (113) and the fourth section (114), wherein the end portions of the third section (113) and the fourth section (114) close to each other respectively have a second bent portion (131, 131') bent from the main body portion of the corresponding section, and each second bent portion is provided with a second through hole (132, 132') for mounting the locking structure (2), and the second through holes on the two second bent portions are aligned with each other in the unfolded state of the frame (1).

5. The dust screen apparatus of claim 2, wherein, The at least four connections comprise a third connection between the fourth section (114) and the fifth section (115), wherein the end portion of the fifth section (115) close to the fourth section (114) is provided with a third bent portion (141) bent from the main body portion, and the third bent portion and the end portion of the fourth section (114) close to the fifth section are respectively provided with a third through hole (142, 142') for mounting the locking structure (2), and the third through holes on the third bent portion and the fourth section (114) are aligned with each other in the unfolded state of the frame (1). The at least four connections comprise a third connection between the fourth section (114) and the fifth section (115), wherein the end portion of the fifth section (115) close to the fourth section (114) is provided with a third bent portion (141) bent from the main body portion, and the third bent portion and the end portion of the fourth section (114) close to the fifth section are respectively provided with a third through hole (142, 142') for mounting the locking structure (2), and the third through holes on the third bent portion and the fourth section (114) are aligned with each other in the unfolded state of the frame (1).

6. The dust screen apparatus of claim 2, wherein, The at least four connecting portions include a fourth connecting portion between the fifth section (115) and the sixth section (116), wherein an end of the fifth section (115) close to the sixth section (116) is provided with a fourth bent portion (151) bent from the main body portion, the fourth bent portion and an end of the sixth section (116) close to the fifth section are respectively provided with fourth through holes (152, 152') for mounting the locking structure (2), and in the unfolded state of the frame (1), the fourth through holes on the fourth bent portion and the sixth section (116) are aligned with each other.

7. The dust screen device of any one of claims 1 to 6, wherein, The dust screen (3) comprises a framework (31) and a net body (32), the framework comprises a peripheral portion connected to the net body and the frame section (11) and an intermediate portion separating and connecting the net body into a first portion (321) and a second portion (322).

8. The dust screen device of claim 7, wherein, The framework (31) and / or the net body (32) are made of nylon material.

9. The dust screen device of any one of claims 1 to 6, wherein, The locking structure (2) comprises a lock pin (21) with a lock hole and a plug pin (22) capable of being inserted into the lock hole, and the lock pin passes through the through holes correspondingly provided on the adjacent two frame sections (11) in the unfolded state of the frame (1).

10. A work machine characterized by, A cooling bag and a dust screen device according to any one of claims 1 to 9 for the cooling bag. A cooling bag and a dust screen device according to any one of claims 1 to 9 for the cooling bag.

Images