Sunshade device, cab and working machine

Abstract

The application relates to the technical field of engineering machinery, and provides a sunshade device, a cab and a working machine, wherein the sunshade device comprises a fixing frame and a sunshade plate mechanism; the fixing frame is fixedly arranged at the edge position of a target window; the sunshade plate mechanism comprises at least two sunshade plates; one of each sunshade plate is fixedly connected with the fixing frame, and the rest sunshade plates are all in sliding connection with the fixing frame; the sliding directions of the sunshade plates relative to the fixing frame are consistent; the sunshade plate mechanism can be switched between a folded state and an unfolded state; in the folded state, any adjacent sunshade plates are overlapped; and in the unfolded state, the adjacent sunshade plates are staggered with each other. By arranging the sunshade device provided by the application at one side of the windshield of the cab of the working machine, the sunshade problem in the cab of the working machine in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, and in particular to a sunshade device, a cab and a working machine. BACKGROUND

[0002] With the diversified application development of working machines, the structure of working machines tends to be fine, humanized and convenient for operation and maintenance. For example, taking excavators as an example, the working environment of excavators at the present stage is usually harsh, and a windshield is generally installed on the cab of the excavator. The light transmittance of the windshield is relatively high, and when working in a high light intensity environment, the eyes of the operator are easily irradiated by sunlight, which causes the operator to have eye fatigue and other problems, affecting the safety of work.

[0003] Therefore, how to solve the sunshade problem in the cab of the working machine in the prior art has become an important technical problem to be solved by the technical personnel in the field. SUMMARY

[0004] The present application provides a sunshade device, a cab and a working machine to solve the sunshade problem in the cab of the working machine in the prior art.

[0005] The present application provides a sunshade device, comprising:

[0006] A fixed frame is fixedly arranged at the edge position of a target window;

[0007] A sunshade plate mechanism comprises at least two sunshade plates, one of each sunshade plate is fixedly connected with the fixed frame, the remaining sunshade plates are all slidingly connected with the fixed frame, and the sliding direction of each sunshade plate relative to the fixed frame is consistent, the sunshade plate mechanism can be switched between a folded state and an unfolded state, in the folded state, any adjacent sunshade plates overlap each other, and in the unfolded state, adjacent sunshade plates are staggered with each other.

[0008] According to the sunshade device provided by the present application, the sunshade plate fixedly connected with the fixed frame is a fixed sunshade plate, and the sunshade plate farthest from the fixed sunshade plate in the unfolded state of the sunshade plate mechanism is an active sunshade plate;

[0009] A linkage mechanism is arranged between two adjacent sunshade plates, and the linkage mechanism is arranged to enable one of the two adjacent sunshade plates far from the fixed sunshade plate to drive the other sunshade plate to slide relative to the fixed frame;

[0010] The sunshade device further comprises:

[0011] A limiting mechanism is arranged between the active sun visor and the fixed frame, and is arranged to selectively limit the sliding of the active sun visor relative to the fixed frame.

[0012] According to the sunshade device, the limiting mechanism comprises:

[0013] A rotating body is rotatably connected to the fixed frame, and a plurality of limiting teeth are arranged in the circumferential direction of the rotating body.

[0014] A transmission assembly is arranged between the active sun visor and the rotating body, and is arranged to drive the rotating body to rotate relative to the fixed frame when the active sun visor slides relative to the fixed frame.

[0015] A positioning member is rotatably connected to the fixed frame, and the rotation axis of the positioning member is parallel to the rotation axis of the rotating body relative to the fixed frame. The positioning member can abut against the limiting teeth, and the limiting teeth can drive the positioning member to rotate relative to the fixed frame in a direction away from the rotating body.

[0016] An elastic member is arranged between the positioning member and the fixed frame, and is arranged to make the positioning member have a tendency to approach the rotating body.

[0017] According to the sunshade device, the transmission assembly comprises:

[0018] A gear is coaxially arranged with the rotating body, and the gear is fixed relative to the rotating body.

[0019] A rack can be meshed and driven by the gear. The first end of the rack is connected to the active sun visor, and the second end is slidably connected to the fixed frame. The sliding track of the second end of the rack relative to the fixed frame is consistent with the sliding track of the active sun visor relative to the fixed frame.

[0020] According to the sunshade device, further comprising:

[0021] A magnetic attraction assembly is arranged between the fixed frame and each sun visor slidably connected to the fixed frame. The magnetic attraction assembly is arranged to enable the sun visor and the fixed frame to produce magnetic attraction.

[0022] According to the sunshade device, a first guide mechanism is arranged between any adjacent sun visors. A second guide mechanism is arranged between the fixed frame and the sun visors slidably connected to the fixed frame.

[0023] The first guide mechanism and the second guide mechanism cooperate to make the adjacent sunshades coplanar when the adjacent sunshades are staggered.

[0024] The linkage mechanism comprises:

[0025] The first limiting component is configured to limit the adjacent sunshades from being separated when the sunshade mechanism is switched from the folded state to the unfolded state.

[0026] The second limiting component is configured to limit the relative positions between the overlapped sunshades when the sunshade mechanism is switched from the unfolded state to the folded state.

[0027] The cab comprises a cab body and the sunshade device, and the sunshade device is arranged on the target window of the cab body.

[0028] The sunshade device comprises a fixed frame and a sunshade mechanism, the fixed frame is arranged on the edge of the target window, and the sunshade mechanism is arranged on the fixed frame.

[0029] The cab comprises the sunshade device or the cab.

[0030] The sunshade device comprises a fixed frame and a sunshade mechanism, the fixed frame is arranged on the edge of the target window, and the sunshade mechanism is arranged on the fixed frame.

[0031] The linkage mechanism is used to realize the linkage of the sunshades, and when the sunshade mechanism is switched between the folded state and the unfolded state, force is only applied to the active sunshade, and thus the operation is convenient.

[0032] The setting of the limiting mechanism makes the sunshade mechanism realize the automatic sunshade stopping, and can ensure the stability of the sunshade mechanism, avoiding the problem of accidental sliding of the sunshade caused by vibration and shaking.

[0033] The setting of the magnetic attraction assembly can produce a buffering effect on the sliding process of the movable sunshade, and can reduce the impact between the sunshades when switching the state of the sunshade mechanism.

[0034] The cooperation of the first guide mechanism and the second guide mechanism can make the sunshades coplanar when the sunshade mechanism is in the unfolded state, improving the appearance of the sunshade device and the fit of the sunshades and the target window.

[0035] Further, in the cab provided by the present application, since the sunshade device as described above is provided, various advantages as described above are also provided.

[0036] Further, in the working machine provided by the present application, since the sunshade device or the cab as described above is provided, various advantages as described above are also provided. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0038] Figure 1 is a front view of the sunshade device provided by the present application in the unfolded state;

[0039] Figure 2 is a front view of the sunshade device provided by the present application in the folded state;

[0040] Figure 3 is a side view of the sunshade device provided by the present application;

[0041] Figure 4 is a structural schematic view of the sunshade device provided by the present application;

[0042] Figure 5 is a connection structure schematic view between the movable sunshade and the fixed frame provided by the present application;

[0043] Figure 6 is a schematic view of the magnetic force column and the first magnetic block in the interaction process provided by the present application;

[0044] Figure 7 is a structural schematic view of a sunshade provided by the present application;

[0045] Figure 8 is another structural schematic view of a sun visor provided by the present application;

[0046] Figure 9 is a structural schematic view of a first guide mechanism provided by the present application.

[0047] Reference signs:

[0048] 1, fixed frame; 2, sun visor mechanism; 3, rotating body; 4, limiting tooth; 5, positioning piece; 6, elastic piece; 7, gear; 8, rack; 9, fixed sun visor; 10, movable sun visor; 11, first magnetic block; 12, sliding block; 13, magnetic column; 14, cross beam; 15, first guide groove; 16, first sliding block; 17, second guide groove; 18, limiting mechanism; 19, spring. DETAILED DESCRIPTION

[0049] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] The sun visor provided by the present application will be described below in combination with Figures 1 to 9 The sun visor provided by the present application will be described below in combination with

[0051] As shown in Figures 1 to 9 , the sun visor provided by the embodiment of the present application comprises a fixed frame 1 and a sun visor mechanism 2.

[0052] Specifically, the fixed frame 1 is used to be fixed at the edge position of a target window, and the sun visor mechanism 2 is arranged on the fixed frame 1 and used to shield and filter the sunlight entering the cab through the target window, so as to reduce the intensity of the light entering the cab.

[0053] The sun visor mechanism 2 comprises at least two sun visors, one of which is fixedly connected with the fixed frame 1, and the rest of the sun visors are all slidably connected with the fixed frame 1, and the sliding directions of the sun visors relative to the fixed frame 1 are consistent.

[0054] During the sliding of the sun visors relative to the fixed frame 1, the sun visor mechanism 2 can be switched between a folded state and an unfolded state.

[0055] When the sun visor mechanism 2 is switched to the folded state, any adjacent sun visors are overlapped, as Figure 2As shown, the sun visor mechanism 2 has been eliminated from blocking sunlight, allowing sunlight to shine into the interior of the cab through the target window.

[0056] When the sun visor mechanism 2 switches to the unfolded state, adjacent sun visors are staggered from each other, such as... Figure 1 As shown, the sun visor is transparent and can block and filter out some sunlight, reducing the amount of sunlight entering the cab and lowering the intensity of light entering the cab, thus alleviating eye fatigue for operators.

[0057] With this configuration, the sunshade device provided by the present invention is installed on one side of the windshield of the cab of the operating machinery, which can solve the sunshade problem in the cab of the operating machinery in the prior art.

[0058] It should be noted that the sunshade described above can be made of glass or resin, as long as it can filter out ultraviolet light, glare, and other light sources. Specifically, the sunshade can also be obtained by attaching a light-filtering transparent film to an ordinary glass plate or ordinary resin plate.

[0059] Specifically, when the sunshade mechanism 2 is in the unfolded state, the sunshade located at one of the edges is fixedly connected to the fixing frame 1, and this sunshade is called the fixed sunshade 9. The remaining sunshades are slidably connected to the fixing frame 1 and are called the movable sunshade 10.

[0060] In some embodiments, when the sun visor mechanism 2 switches between a folded state and an unfolded state, force can be applied to each movable sun visor 10 to adjust the position of each movable sun visor 10 so that the sun visors can be staggered as needed.

[0061] In other embodiments, force may be applied to only one of the movable sunshades 10, which will cause the other movable sunshades 10 to slide relative to the fixed frame 1, thereby adjusting the position of the other movable sunshades 10.

[0062] Specifically, the sun visor located on the other edge when the sun visor mechanism 2 is in the unfolded state can be selected as the active sun visor, so that when the sun visor mechanism 2 switches between the folded state and the unfolded state, only the active sun visor needs to be subjected to force.

[0063] At this point, a linkage mechanism needs to be set between adjacent sunshades. The linkage mechanism enables the one of the two adjacent sunshades that is farther away from the fixed sunshade 9 to drive the other to slide relative to the fixed frame 1.

[0064] The linkage mechanism includes a first limit component and a second limit component.

[0065] When the sunshade mechanism 2 is switched from the folded state to the unfolded state, the first limiting assembly is used to limit the disengagement of adjacent sunshades.

[0066] For the convenience of description, it is defined that the movable sunshades 10 between the active sunshade and the fixed sunshades 9 are sequentially the first sunshade, the second sunshade, the third sunshade, and so on.

[0067] When the active sunshade is slid to be disengaged from the first sunshade, the first limiting assembly between the active sunshade and the first sunshade can make the active sunshade drive the first sunshade to slide relative to the fixed frame 1. When the active sunshade is slid to be disengaged from the second sunshade, the first limiting assembly between the first sunshade and the second sunshade can make the first sunshade drive the second sunshade to slide relative to the fixed frame 1. In this way, each movable sunshade 10 between the active sunshade and the fixed sunshades 9 can slide relative to the fixed frame 1 under the driving of the active sunshade.

[0068] When the sunshade mechanism 2 is switched from the unfolded state to the folded state, the second limiting assembly is used to limit the relative positions between the overlapped sunshades.

[0069] When the active sunshade is slid to be overlapped with the first sunshade, the second limiting assembly between the active sunshade and the first sunshade can make the active sunshade drive the first sunshade to slide relative to the fixed frame 1. When the active sunshade is slid to be disengaged from the second sunshade, the second limiting assembly between the first sunshade and the second sunshade can make the first sunshade drive the second sunshade to slide relative to the fixed frame 1. In this way, each movable sunshade 10 between the active sunshade and the fixed sunshades 9 can slide relative to the fixed frame 1 under the driving of the active sunshade.

[0070] The sliding of the active sunshade relative to the fixed frame 1 can be completed by manual force of the operator. Specifically, a handle can be arranged on the active sunshade to facilitate the operator to apply force.

[0071] In the embodiment, the first limiting assembly and the second limiting assembly are arranged in the form of limiting blocks. The limiting blocks can be arranged on both ends of each sunshade in the sliding direction of the movable sunshade 10. After the sunshades are overlapped, one limiting block of one sunshade is located between the two limiting blocks of the other sunshade.

[0072] In the embodiment, the sunshade device further comprises a limiting mechanism 18 arranged between the active sunshade and the fixed frame 1, which can selectively limit the sliding of the active sunshade relative to the fixed frame 1.

[0073] The sun visor mechanism 2 is in the unfolded state, the sun visor farthest from the fixed sun visor 9 is the active sun visor, and the limiting mechanism 18 is arranged between the active sun visor and the fixed frame 1.

[0074] When the operator applies force to the active sun visor and overcomes the action of the limiting mechanism 18, the active sun visor can slide relative to the fixed frame 1.

[0075] When the operator stops applying force to the active sun visor or the force applied by the operator to the active sun visor is insufficient to overcome the action of the limiting mechanism 18, the active sun visor is relatively stationary with the fixed frame 1. In this way, the active sun visor is stopped, the sun visor mechanism 2 can have different sun-shading ranges, and the stability of the sun visor mechanism 2 can be ensured, avoiding the problem of accidental sliding of the sun visor due to vibration and shaking.

[0076] In this embodiment, the limiting mechanism 18 includes a rotating body 3, a transmission assembly, a positioning member 5, and an elastic member 6, which are described with reference to Figure 4 .

[0077] The rotating body 3 is rotationally connected to the fixed frame 1, and the transmission assembly is arranged between the active sun visor and the rotating body 3. When the active sun visor slides relative to the fixed frame 1, the active sun visor can drive the rotating body 3 to rotate relative to the fixed frame 1.

[0078] The positioning member 5 is rotationally connected to the fixed frame 1, and the rotation axis of the positioning member 5 relative to the fixed frame 1 is parallel to the rotation axis of the rotating body 3 relative to the fixed frame 1.

[0079] A plurality of limiting teeth 4 are arranged circumferentially on the rotating body 3, and a limiting groove is formed between adjacent limiting teeth 4. The positioning member 5 can extend into the limiting groove and abut against the limiting teeth 4. When the rotating body 3 rotates relative to the fixed frame 1, the limiting teeth 4 can drive the positioning member 5 to rotate relative to the fixed frame 1 in a direction away from the rotating body 3. When the positioning member 5 rotates to a region outside the tooth top circle of the rotating body 3, the limiting teeth 4 and the positioning member 5 are disengaged, and the rotating body 3 continues to rotate to the next limiting tooth 4 and the positioning member 5.

[0080] The above-mentioned elastic member 6 is arranged between the positioning member 5 and the fixed frame 1, and is used to make the positioning member 5 have a tendency to approach the rotating body 3.

[0081] After the last limiting tooth 4 and the positioning member 5 are disengaged, the positioning member 5 approaches the rotating body 3 under the action of the elastic member 6 to act on the next limiting tooth 4. Through the interaction of the positioning member 5 and the next limiting tooth 4, the rotation of the rotating body 3 can be limited, thereby limiting the sliding of the active sun visor and ensuring the stability of the active sun visor.

[0082] The two positioning members 5 can have an included angle between their extending directions. The rotation center of the rotating body 3 is located on the bisector of the included angle. Through the interaction between the two positioning members 5 and the limiting teeth 4, the rotating body 3 can be limited in two directions.

[0083] In the embodiment, the transmission assembly includes a gear 7 and a rack 8, and the rack 8 can be engaged with the gear 7 for transmission. The gear 7 is coaxially arranged with the rotating body 3, and the gear 7 is fixed relative to the rotating body 3. The first end of the rack 8 is connected with the active sunshade, and the second end is slidingly connected with the fixed frame 1. Moreover, the sliding track of the second end of the rack 8 relative to the fixed frame 1 is consistent with the sliding track of the active sunshade relative to the fixed frame 1.

[0084] When the active sunshade slides relative to the fixed frame 1, the rack 8 is driven to slide relative to the fixed frame 1. Under the engagement transmission between the rack 8 and the gear 7, the gear 7 can be driven to rotate relative to the fixed frame 1, thereby driving the rotating body 3 to rotate relative to the fixed frame 1.

[0085] In further embodiments, the sunshade device further includes a magnetic attraction assembly, which is arranged between the fixed frame 1 and each active sunshade 10. During the sliding process of the active sunshade 10 relative to the fixed frame 1, the magnetic attraction between the active sunshade 10 and the fixed frame 1 can generate a magnetic attraction between the sunshade and the fixed frame 1.

[0086] In specific embodiments, the magnetic attraction assembly includes a first magnetic block 11 and a second magnetic block. The first magnetic block 11 is arranged on the fixed frame 1, and a plurality of first magnetic blocks 11 are arranged at intervals along the sliding direction of the active sunshade 10. The second magnetic block is arranged on the active sunshade 10. During the sliding process of the active sunshade 10 relative to the fixed frame 1, the second magnetic block can meet different first magnetic blocks 11. The magnetic attraction between the first magnetic block 11 and the second magnetic block has a buffering effect on the sliding process of the active sunshade 10, and can reduce the impact between the sunshades when switching the state of the sunshade mechanism 2.

[0087] In addition, when the state of the sunshade mechanism 2 is adjusted, the first magnetic block 11 exactly interacts with the second magnetic block. At this time, the magnetic attraction assembly cooperates with the limiting mechanism 18, which can further improve the stability and reliability of the sunshade mechanism 2 in this state.

[0088] Reference Figure 6The first magnetic block 11 is arranged in a parabolic shape, and the symmetry axis of the parabola is perpendicular to the sliding direction of the movable sunshade plate 10. The second magnetic block comprises a sliding block 12, a magnetic column 13 and a spring 19. The sliding block 12 is fixedly connected with the movable sunshade plate 10, the magnetic column 13 is slidably connected with the sliding block 12, and the sliding direction is parallel to the symmetry axis of the parabola. The spring 19 is arranged between the magnetic column 13 and the sliding block 12, and the two ends of the spring 19 are connected to the magnetic column 13 and the sliding block 12 respectively. The magnetic column 13 has a tendency to move away from the vertex of the parabola under the action of the spring 19.

[0089] When the second magnetic block starts to act on the first magnetic block 11, the first magnetic block 11 interacts with the magnetic column 13. With the sliding of the sliding block 12, the magnetic column 13 can slide relative to the sliding block 12 in a direction close to the vertex of the parabola until the sliding track of the magnetic column 13 relative to the sliding block 12 coincides with the symmetry axis of the parabola, and the magnetic column 13 is just located at the vertex of the parabola, as shown in FIG. 2. Figure 6 When the sliding block 12 continues to slide, the magnetic column 13 slides relative to the sliding block 12 in a direction away from the vertex of the parabola under the action of the spring 19.

[0090] In this way, during the action of the second magnetic block on the first magnetic block 11, the magnetic column 13 slides along the outer contour of the first magnetic block 11, which prolongs the action time of the first magnetic block 11 and the second magnetic block, and improves the buffering effect on the movable sunshade plate 10.

[0091] It should be noted that the first magnetic block 11 can also be arranged in a triangular shape.

[0092] The fixed frame 1 comprises two cross beams 14, which are parallel to each other and are spaced apart. The two ends of the fixed sunshade plate 9 are fixedly connected with the two cross beams 14 respectively, and the two ends of each movable sunshade plate 10 are slidably connected with the two cross beams 14 respectively. When the sunshade device is installed in the cab, the two cross beams 14 can be arranged at the upper and lower edge positions of the target window of the cab.

[0093] In the embodiment of the present application, the first guide mechanism is arranged between any adjacent sunshade plates, and the second guide mechanism is arranged between the fixed frame 1 and the movable sunshade plate 10. The first guide mechanism cooperates with the second guide mechanism to make the adjacent sunshade plates coplanar when the adjacent sunshade plates are staggered with each other.

[0094] Specifically, the first guide mechanism comprises a first guide slot 15 and a first sliding block 16, one of the two adjacent sunshades is provided with the first guide slot 15, and the other is provided with the first sliding block 16. The first guide slot 15 has a straight section and an inclined section, the straight section is consistent with the transverse direction of the target window, and the inclined section has an angle with the transverse direction of the target window. The first sliding block 16 can slide along the straight section and the inclined section, and when the first sliding block 16 slides along the inclined section, the movable sunshade 10 can gradually approach the fixed sunshade 9 in a direction perpendicular to the fixed sunshade 9.

[0095] With reference to Figure 5 , if the sunshade mechanism 2 is in the folded state and the movable sunshade 10 is located on the side of the fixed sunshade 9 close to the fixed frame 1, the distance between the inclined section of the first guide slot 15 and the fixed frame 1 can gradually increase along the sliding direction of the movable sunshade 10 when the sunshade mechanism 2 is unfolded.

[0096] It should be noted that the first sliding block 16 can be arranged at the end of the sunshade and protrude from the sunshade in the sliding direction of the sunshade. When the first sliding block 16 slides along the inclined section of the first guide slot 15 to the coplanar state of the two sunshades, the first sliding block 16 is located between the two ends of the inclined section, and the first sliding block 16 is located on the side of the other sunshade close to the fixed frame 1, with reference to Figure 9 At this time, the interaction between the first sliding block 16 and the other sunshade and the interaction between the first sliding block 16 and the inclined section of the first guide slot 15 can limit the further unfolding of the two adjacent sunshades and can limit the disengagement of the two adjacent sunshades when the sunshade mechanism switches to the unfolded state. That is, the first sliding block 16 and the inclined section of the first guide slot 15 at this time can replace the first limiting assembly described above.

[0097] The second guide mechanism comprises a second guide slot 17 and a second sliding block, each movable sunshade 10 is provided with a second sliding block, and each second sliding block can slide along the second guide slot 17. The second guide slot 17 is arranged on the cross beam 14, and the second guide slot 17 has a straight section and an inclined section, and a plurality of straight sections and inclined sections are arranged alternately and connected end to end. The straight section is consistent with the transverse direction of the target window, and the inclined section has an angle with the transverse direction of the target window. The second sliding block can slide along the straight section and the inclined section, and when the second sliding block slides along the inclined section, the movable sunshade 10 can gradually approach the fixed sunshade 9 in a direction perpendicular to the fixed sunshade 9.

[0098] It should be noted that, since the second sliding block is arranged on each movable sunshade plate 10, each second sliding block is located in the second guide groove 17. When the sunshade mechanism is switched to the folded state, the second sliding blocks on the adjacent two movable sunshade plates 10 can abut against each other to limit the relative position between the superimposed sunshade plates. The interaction between the second sliding block on the movable sunshade plate 10 adjacent to the fixed sunshade plate 9 and the end of the second guide groove 17 can limit the relative position between the movable sunshade plate 10 and the fixed sunshade plate 9 when the sunshade mechanism is switched to the folded state. That is, each second sliding block at this time can replace the second limiting component described above.

[0099] The second sliding block described above can be the same part as the sliding block 12 of the second magnetic block.

[0100] The inclination degree of the inclined section of the second guide groove 17 is consistent with the inclination degree of the inclined section of the first guide groove 15, so as to ensure that the movable sunshade plate 10 can smoothly slide relative to the fixed frame 1 and relative to the adjacent sunshade plate, and to ensure the smooth sliding of the movable sunshade plate 10 and avoid the problem of being stuck.

[0101] It should be noted that, a limiting mechanism 18, a magnetic attraction assembly and a second guide mechanism are arranged between the two ends of the sunshade plate and the two cross beams 14.

[0102] In order to ensure that the adjacent sunshade plates can be seamlessly connected after the sunshade mechanism 2 is switched to the unfolded state, or to minimize the gap between the adjacent sunshade plates, the end surface of the sunshade plate at both ends in the sliding direction thereof can be provided as an inclined surface, and the inclined surface is parallel to the inclined section of the first guide groove 15.

[0103] On the other hand, the embodiment of the present application also provides a cab, which comprises a cab body and the sunshade device provided by any of the above embodiments. The sunshade device is arranged on a target window of the cab body. When it is needed to use the sunshade device to reduce the light intensity entering the cab body through the target window, the sunshade plate mechanism 2 of the sunshade device can be switched to the unfolded state. When the sunshade device is not needed to be used, the sunshade plate mechanism 2 of the sunshade device can be switched to the folded state. The sunshade device in the above embodiments can not only reduce the light intensity entering the cab body, but also ensure the field of view of the operator, thereby ensuring the safety of operation. Therefore, the cab in the present embodiment can adjust the light intensity entering the cab body on demand, and can ensure the field of view of the operator, thereby ensuring the safety of use. The beneficial effects of the cab in the embodiment of the present application are similar to the beneficial effects of the sunshade device, and thus will not be described here again.

[0104] The sliding direction of the sunshade plate of the sunshade device relative to the fixed frame 1 is parallel to the transverse direction of the target window, that is, for the operator in the cab, the sliding direction of the sunshade plate is the left-right direction.

[0105] The bending radius of the sunshade board is consistent with the bending radius of the target window, and the sunshade boards are coplanar and can be in contact with the target window when the sunshade board mechanism 2 of the sunshade device is in the unfolded state. The influence of the sunshade device on the interior space of the cab is reduced, and the clarity and field of view are improved.

[0106] It should be noted that the sunshade device can be provided on the front windshield window of the cab, and can also be provided on the side windshield window of the cab, and can be provided according to specific needs.

[0107] In another aspect, the embodiments of the present application also provide a working machine comprising the sunshade device or the cab provided by any of the above embodiments. The working machine has all the advantages of the above sunshade device or cab, and will not be described here. The derivation process of the beneficial effects of the working machine in the embodiments of the present application is similar to that of the above sunshade device or cab, and therefore will not be described here.

[0108] In the embodiments of the present application, the type of the working machine does not constitute a limitation, for example, the working machine can be an engineering machine such as a crane, an excavator, a pile machine, etc., or an engineering vehicle such as an aerial platform vehicle, a fire engine, a mixing vehicle, etc. In other words, as long as the working machine can use the sunshade device in the embodiments of the present application.

[0109] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A sun shading device, characterized in that The application relates to a sunshade device for a target window, which comprises the following components: a fixed frame arranged at the edge of the target window; a sunshade mechanism comprising at least two sunshades, one of each of the sunshades is fixedly connected with the fixed frame, the rest of the sunshades are slidably connected with the fixed frame, the sliding directions of each of the sunshades relative to the fixed frame are consistent, the sunshade fixedly connected with the fixed frame is a fixed sunshade, the rest of the sunshades are movable sunshades, the sunshade mechanism can be switched between a folded state and an unfolded state, in the folded state, any adjacent sunshades are overlapped, in the unfolded state, adjacent sunshades are staggered, in the unfolded state, the sunshade farthest from the fixed sunshade is a main movable sunshade, a linkage mechanism is arranged between any two adjacent sunshades, the linkage mechanism is arranged to drive one of the two adjacent sunshades far from the fixed sunshade to slide relative to the fixed frame, a first guide mechanism is arranged between any two adjacent sunshades, a second guide mechanism is arranged between the fixed frame and the sunshades slidably connected with the fixed frame, the first guide mechanism and the second guide mechanism can make the adjacent sunshades coplanar when the adjacent sunshades are staggered; a limiting mechanism arranged between the main movable sunshade and the fixed frame, the limiting mechanism is arranged to selectively limit the main movable sunshade from sliding relative to the fixed frame; the limiting mechanism comprises: a rotating body rotatably connected with the fixed frame, a plurality of limiting teeth are arranged in the circumferential direction of the rotating body; a transmission assembly arranged between the main movable sunshade and the rotating body, the transmission assembly is arranged to drive the rotating body to rotate relative to the fixed frame when the main movable sunshade slides relative to the fixed frame; a positioning member rotatably connected with the fixed frame, the rotation axis of the positioning member relative to the fixed frame is parallel to the rotation axis of the rotating body relative to the fixed frame, the positioning member can abut against the limiting teeth, and the limiting teeth can drive the positioning member to rotate relative to the fixed frame in a direction away from the rotating body; a resilient member arranged between the positioning member and the fixed frame, the resilient member is arranged to make the positioning member have a tendency to approach the rotating body.

2. A shading device according to claim 1, characterised in that the transmission assembly comprises: a gear coaxially arranged with the rotating body, and the gear is fixed relative to the rotating body; a rack capable of meshing and driving the gear, a first end of the rack is connected with the main movable sunshade, and a second end of the rack is slidably connected with the fixed frame, the sliding track of the second end of the rack relative to the fixed frame is consistent with the sliding track of the main movable sunshade relative to the fixed frame.

3. A shading device according to claim 1, characterised in that further comprising: a magnetic attraction assembly arranged between the fixed frame and each of the sunshades slidably connected with the fixed frame, the magnetic attraction assembly is arranged to enable the sunshades and the fixed frame to produce magnetic attraction.

4. A shading device according to claim 1, characterised in that the linkage mechanism comprises: The first limiting component is configured to limit the adjacent sun visors from being separated when the sun visor mechanism is switched from the folded state to the unfolded state. The second limiting component is configured to limit the relative position between the overlapped sun visors when the sun visor mechanism is switched from the unfolded state to the folded state.

5. A cab characterized in that The cab includes a cab body and a sunshade device, the sunshade device is arranged on a target window of the cab body, and the sunshade device is the sunshade device according to any one of claims 1 to 4.

6. The cab of claim 5, wherein, The sliding direction of the sun visor relative to the fixed frame is parallel to the transverse direction of the target window, and the bending curvature of the sun visor is consistent with the bending curvature of the target window.

7. A work machine characterized by comprising: The cab includes the sunshade device according to any one of claims 1 to 4, or the cab includes the cab according to any one of claims 5 to 6.

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