Lengthened upper protection structure and dumper

Abstract

The lengthened upper protection structure comprises an upper protection plate, a jacking oil cylinder and an auxiliary supporting device, the upper protection plate is connected to a cargo compartment side plate in a rotating mode, the jacking oil cylinder is hinged between a cargo compartment front plate and the upper protection plate, and the auxiliary supporting device comprises a lower supporting piece and an upper supporting piece. The upper protection plate has a protection state and an overturning state, and when the upper protection plate is in the overturning state, the lower supporting piece is separated from the upper supporting piece; when the upper protection plate is in the protection state, the lower supporting piece can abut against the lower portion of the upper supporting piece so as to support the upper protection plate. According to the lengthened upper protection structure, the jacking oil cylinder is used for jacking the upper protection plate upwards to the turnover state, and enough operation space can be provided for turnover and maintenance of a cab. The auxiliary supporting device is arranged to rigidly support the upper protection plate, so that the safety coefficient of the lengthened upper protection structure is improved, the stability of the lengthened upper protection structure is improved, and the service life of the lengthened upper protection structure is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and particularly relates to an extended upper protection structure and a dump truck. Background Technique

[0002] A dump truck refers to a vehicle that can unload goods by itself through hydraulic or mechanical lifting, also known as a tipping truck, which is usually composed of components such as an automobile chassis, a hydraulic lifting mechanism, a cargo box, and a power take-off device. The upper protection of a dump truck, as an important part of the cargo box, plays a role in protecting the cab and the hydraulic system. In pithead mining areas, when transporting large media such as ore, in order to strengthen the protection above the cab, users often require the upper protection to be extended beyond the front end of the cab.

[0003] In the prior art, most of the extended upper protections are fixed structures welded to the cargo box. When the cab needs to be flipped for maintenance operations, it is necessary to first lift the cargo box and then perform maintenance operations, with low efficiency and potential safety hazards. In this regard, some manufacturers have also set the upper protection as a pneumatic lifting structure, but pneumatic lifting is applicable to lightweight (weighing within 100 kg) upper protection structures, mainly used in dump trucks for muck transportation. For the extended upper protection structure of dump trucks used in mining areas, the weight can reach more than 500 kg, and the pneumatic lifting force is significantly insufficient, resulting in potential safety hazards during the lifting process of the upper protection. Content of the Utility Model

[0004] An embodiment of the utility model provides an extended upper protection structure, which improves the safety factor of the extended upper protection structure, and increases the stability and service life of the extended upper protection structure by setting a jacking oil cylinder and an auxiliary support device.

[0005] To achieve the above object, the technical solution adopted by the utility model is: In the first aspect, an extended upper protection structure is provided, which includes an upper protection plate, a jacking oil cylinder, and an auxiliary support device. The upper protection plate is rotatably connected to the side plate of the cargo box. The jacking oil cylinder is hinged between the front plate of the cargo box and the upper protection plate. The auxiliary support device includes a lower support member connected to the front plate of the cargo box and an upper support member connected to the upper protection plate.

[0006] Wherein, the upper protection plate has a protection state when the jacking oil cylinder retracts and resets, and a flipping state when it is flipped upward under the jacking action of the jacking oil cylinder. When the upper protection plate is in the flipping state, the lower support member is separated from the upper support member. When the upper protection plate is in the protection state, the lower support member can abut against the lower part of the upper support member to support the upper protection plate.

[0007] As another embodiment of the present utility model, the upper support member includes a connecting plate connected below the upper protection plate and an upper support block connected below the connecting plate; the lower support member includes a connecting bracket connected to the front side of the cargo box front plate and a lower support block connected above the connecting bracket. When the upper protection plate is in the protection state, the lower support block is used to support the bottom of the upper support block.

[0008] As another embodiment of the present utility model, the top of the lower support block is provided with an arc-shaped groove that is concave downward, and the arc-shaped groove extends in the left-right direction. The bottom of the upper support block is provided with an arc-shaped strip that can cooperate with the arc-shaped groove.

[0009] As another embodiment of the present utility model, the connecting bracket includes a bracket vertical plate connected to the front side of the cargo box front plate, an inclined support column connected to the front side wall of the bracket vertical plate, and a bracket horizontal plate connected to the upper end of the inclined support column. The inclined support column gradually inclines and extends forward from bottom to top, the bracket horizontal plate is arranged in the horizontal direction, and the lower support block is connected to the bracket horizontal plate.

[0010] As another embodiment of the present utility model, the upper protection plate includes a protection plate body, side wing plates respectively connected to the left and right sides of the protection plate body, and a reinforcing rib plate connected to the bottom of the protection plate body. The upper support member is connected to the reinforcing rib plate. The side wing plates are located outside the cargo box side plates, and a flipping hinge assembly is connected between the side wing plates and the cargo box side plates.

[0011] As another embodiment of the present utility model, the flipping hinge assembly includes a flipping shaft sleeve connected to the cargo box side plate and a flipping pin shaft rotatably connected inside the flipping shaft sleeve. The main shaft of the flipping shaft sleeve extends in the left-right direction. The side wing plate is provided with a wing plate shaft sleeve sleeved on the outer periphery of the flipping pin shaft, and the wing plate shaft sleeve is arranged adjacent to the flipping shaft sleeve.

[0012] As another embodiment of the present utility model, a spiral oil groove is provided on the inner peripheral wall of the flipping shaft sleeve. An oil filling channel communicated with the oil groove is arranged inside the flipping pin shaft. An oil filling port communicated with the oil filling channel is arranged on the outer end face of the flipping pin shaft, and an oil cup is connected to the oil filling port.

[0013] As another embodiment of the present utility model, a wing plate flange is connected to the outer side wall of the side wing plate. The flipping hinge assembly further includes a flange cover plate located outside the wing plate flange. The flange cover plate is connected to the side wing plate through a connecting member penetrating the wing plate flange. The flange cover plate is located outside the flipping pin shaft and is used to limit the flipping pin shaft from moving axially outward. An avoidance hole for the oil cup to pass through is provided on the flange cover plate.

[0014] As another embodiment of the present utility model, a convex platform portion protruding outward is provided at the outer end of the flipping pin shaft. A first washer is sleeved on the outer periphery of the flipping pin shaft, and the first washer is located between the convex platform portion and the side wing plate; a second washer is arranged between the side wing plate and the cargo box side plate, and the second washer is sleeved on the outer periphery of the wing plate shaft sleeve.

[0015] The beneficial effects of the lengthened upper protection structure provided by the present utility model are as follows: Compared with the prior art, for the lengthened upper protection structure of the present utility model, when maintenance operations need to be carried out on the cab or the hydraulic system, the lifting oil cylinder is used to lift the upper protection plate upwards to a flipped state, thereby being able to provide sufficient operating space for the flipping and maintenance of the cab. By setting up the auxiliary support device to play a rigid supporting role on the upper protection plate, on the one hand, it can avoid the upper protection plate swinging downwards excessively and damaging the cab when the lifting oil cylinder fails or is disassembled for maintenance, improving the safety factor of the lengthened upper protection structure; on the other hand, it can replace the lifting oil cylinder to support the upper protection plate when the upper protection plate is in the protection state, avoiding the lifting oil cylinder being stressed for a long time and shortening its service life, and thus contributing to increasing the stability and service life of the lengthened upper protection structure.

[0016] Second, the embodiment of the present utility model also provides a dump truck, including the

[0017] lengthened upper protection structure proposed in any one of the foregoing.

[0018] The beneficial effects of the dump truck provided in this embodiment are the same as those of the foregoing lengthened upper protection structure, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the lengthened upper protection structure provided by the embodiment of the present utility model (the upper protection plate is in the protection state);

[0021] Figure 2 It is a schematic structural diagram of the lengthened upper protection structure provided by the embodiment of the present utility model (the upper protection plate is in the flipped state);

[0022] Figure 3 It is a schematic side view structural diagram of the auxiliary support device provided by the embodiment of the present utility model;

[0023] Figure 4 For the embodiment of the present utility model Figure 1 partial side view structural diagram;

[0024] Figure 5 For the embodiment of the present utility model Figure 4 cross-sectional view along line A-A;

[0025] Figure 6 Schematic structural diagram of a dump truck including an extended upper protection structure provided by an embodiment of the present utility model (the upper protection plate is in a protection state);

[0026] Figure 7 Schematic structural diagram of a dump truck including an extended upper protection structure provided by an embodiment of the present utility model (the upper protection plate and the cab are both in a flipped state).

[0027] Among them, the reference numerals in the figures are as follows:

[0028] 1. Upper protection plate; 11. Protection plate body; 12. Flank plate; 121. Flange bushing of the wing plate; 122. Flange of the wing plate; 13. Reinforcing rib plate; 2. Jacking oil cylinder; 21. Oil cylinder base; 22. Oil cylinder top seat; 3. Auxiliary support device; 31. Lower support member; 311. Connecting bracket; 3111. Vertical plate of the bracket; 3112. Oblique support column; 3113. Horizontal plate of the bracket; 312. Lower support block; 3121. Arc groove; 32. Upper support member; 321. Connecting plate; 322. Upper support block; 3221. Arc strip; 4. Flip hinge assembly; 41. Flip bushing; 411. Oil groove; 42. Flip pin; 421. Oil filling channel; 422. Boss part; 423. Oil filling port; 43. Flange cover plate; 431. Avoidance hole; 44. Oil cup; 45. First washer; 46. Second washer; 47. Connecting piece; 10. Side plate of the cargo box; 20. Front plate of the cargo box; 30. Cab; 40. Hydraulic system. Detailed implementation manners

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or several of such features. In the description of the present invention, the meaning of "a plurality" and "several" is two or more, unless otherwise specifically defined.

[0031] Please refer to Figures 1 to 7 , and now a lengthened upper protection structure provided by the present utility model will be described. The lengthened upper protection structure includes an upper protection plate 1, a jacking oil cylinder 2, and an auxiliary support device 3. The upper protection plate 1 is rotatably connected to the side plate 10 of the cargo box. The jacking oil cylinder 2 is hinged between the front plate 20 of the cargo box and the upper protection plate 1. The auxiliary support device 3 includes a lower support member 31 connected to the front plate 20 of the cargo box and an upper support member 32 connected to the upper protection plate 1. Among them, the upper protection plate 1 has a protection state when the jacking oil cylinder 2 retracts and resets, and a flipping state when it is flipped upward under the jacking action of the jacking oil cylinder 2. When the upper protection plate 1 is in the flipping state, the lower support member 31 is separated from the upper support member 32. When the upper protection plate 1 is in the protection state, the lower support member 31 can abut against the lower part of the upper support member 32 to support the upper protection plate 1.

[0032] Compared with the prior art, for the lengthened upper protection structure provided in this embodiment, when maintenance operations need to be carried out on the cab 30 or the hydraulic system 40, the jacking oil cylinder 2 is used to jack the upper protection plate 1 upward to the flipping state, so as to provide sufficient operating space for the flipping and maintenance of the cab 30. By setting the auxiliary support device 3 to play a rigid supporting role for the upper protection plate 1, on the one hand, it can prevent the upper protection plate 1 from swinging downward excessively and damaging the cab 30 when the jacking oil cylinder 2 fails or is disassembled and maintained, improving the safety factor of the lengthened upper protection structure; on the other hand, it can support the upper protection plate 1 instead of the jacking oil cylinder 2 when the upper protection plate 1 is in the protection state, avoiding the jacking oil cylinder 2 from being stressed for a long time and shortening its service life, and thus helping to increase the stability and service life of the lengthened upper protection structure.

[0033] In this embodiment, the upper protection plate 1 is rotatably connected to the side plate 10 of the cargo box and is located above the cab 30 of the dump truck. When the dump truck is working, the upper protection plate 1 is in a protective state and can protect the cab 30 and the hydraulic system 40 located between the cab 30 and the cargo box. Since the self-weight of the extended upper protection is too large and the pneumatic lifting force is significantly insufficient, in this embodiment, a hydraulic lifting cylinder 2 is used instead of a cylinder, so that the bearing capacity is more than 5 times higher and the lifting weight can reach more than 1 ton. At the same time, with the auxiliary support device 3, not only the safety factor of the extended upper protection structure is greatly improved, but also it provides convenience for later maintenance operations. It should be noted that the type selection of the lifting cylinder 2 needs to be determined according to the weight of the upper protection plate 1 to ensure safety performance.

[0034] Specifically, there are two lifting cylinders 2 and two auxiliary support devices 3. The two lifting cylinders 2 are respectively arranged near the left and right sides of the upper protection plate 1, and the two auxiliary support devices 3 are correspondingly located inside the two lifting cylinders 2. Through the above settings, stable support for the upper protection plate 1 can be ensured.

[0035] More specifically, an oil cylinder base 21 is connected to the front plate 20 of the cargo box, and an oil cylinder top seat 22 is connected to the upper protection plate 1. The fixed end of the lifting cylinder 2 is hinged to the oil cylinder base 21, and the extending end is hinged to the oil cylinder top seat 22. In addition, both between the oil cylinder base 21 and the front plate 20 of the cargo box and between the oil cylinder top seat 22 and the upper protection plate 1, a detachable connection method using high-strength bolts is adopted, which improves the installation efficiency and is convenient for subsequent disassembly and maintenance.

[0036] In this embodiment, an independent power unit is also equipped for the lifting cylinder 2, and the power unit is of the structure of an integrated hydraulic pump station. The power unit is detachably connected to the front plate 20 of the cargo box through a connecting frame and high-strength bolts. When installing the power unit, it should be noted that it cannot interfere with the hydraulic system 40 of the dump truck. The power unit is separately and independently arranged from the hydraulic system 40 of the whole vehicle, which helps to improve the overall stability of the upper protection structure and is convenient for subsequent maintenance work.

[0037] As a specific implementation manner of an extended upper protection structure provided by the present utility model, see Figure 2 and Figure 3 , the upper support member 32 includes a connecting plate 321 connected to the lower side of the upper protection plate 1 and an upper support block 322 connected to the lower side of the connecting plate 321; the lower support member 31 includes a connecting bracket 311 connected to the front side of the front plate 20 of the cargo box and a lower support block 312 connected to the upper side of the connecting bracket 311. When the upper protection plate 1 is in a protective state, the lower support block 312 is used to support the bottom of the upper support block 322.

[0038] In this embodiment, a detachable connection method using high-strength bolts is adopted between the connecting plate 321 and the upper protection plate 1, as well as between the connecting support base 311 and the front panel 20 of the cargo compartment, which is convenient for later maintenance operations. Both the upper support block 322 and the lower support block 312 are made of high-strength wear-resistant materials to improve the load-bearing strength of the auxiliary support device 3.

[0039] As a specific implementation manner of an extended upper protection structure provided by the present utility model, refer to Figure 2 and Figure 3 , an arc-shaped groove 3121 that is concave downward is provided at the top of the lower support block 312. The arc-shaped groove 3121 extends in the left-right direction, and an arc-shaped strip 3221 that can cooperate with the arc-shaped groove 3121 is provided at the bottom of the upper support block 322.

[0040] In this embodiment, the top surface of the lower support block 312 is provided with the arc-shaped groove 3121, and the front and rear ends of its top surface are smoothly transitioned with the arc-shaped groove 3121 respectively. At the same time, the bottom surface of the upper support block 322 is provided with the arc-shaped strip 3221, and the front and rear ends of its bottom surface are smoothly transitioned with the arc-shaped strip 3221 respectively. When the upper protection plate 1 descends from the flipped state to the protection state, the arc-shaped groove 3121 and the arc-shaped strip 3221 gradually change from the separated state to the closely fitting state. In the above process, not only the supporting effect of the lower support block 312 on the upper support block 322 in the vertical direction is realized, but also the guiding and limiting effects in the front-rear direction are achieved, improving the stability of the extended upper protection structure.

[0041] As a specific implementation manner of an extended upper protection structure provided by the present utility model, refer to Figure 2 and Figure 3 , the connecting support base 311 includes a support base vertical plate 3111 connected to the front side of the front panel 20 of the cargo compartment, an inclined support column 3112 connected to the front side wall of the support base vertical plate 3111, and a support base horizontal plate 3113 connected to the upper end of the inclined support column 3112. The inclined support column 3112 gradually extends forward and obliquely upward, the support base horizontal plate 3113 is arranged in the horizontal direction, and the lower support block 312 is connected to the support base horizontal plate 3113.

[0042] In this embodiment, the inclined support column 3112 adopts a rectangular tubular structure, and both ends thereof are processed into inclined surfaces to adapt to the connection with the vertical front panel 20 of the cargo compartment, and at the same time ensure that the support base horizontal plate 3113 located above it can be arranged horizontally. The inclined arrangement of the inclined support column 3112 forms a triangular support structure among the upper protection plate 1, the auxiliary support device 3, and the front panel 20 of the cargo compartment, improving the stability of the extended upper protection structure.

[0043] As a specific implementation manner of an extended upper protection structure provided by the present utility model, refer to Figure 1 and Figure 4, the upper protection plate 1 includes a protection plate body 11, wing plates 12 respectively connected to the left and right sides of the protection plate body 11, and a reinforcing rib plate 13 connected to the bottom of the protection plate body 11. The upper support member 32 is connected to the reinforcing rib plate 13. The wing plates 12 are located outside the cargo box side plate 10, and a flip hinge assembly 4 is connected between the wing plates 12 and the cargo box side plate 10.

[0044] In this embodiment, the protection plate body 11 is an "L"-shaped lengthened structure to maximize the protection of the cab 30 and the hydraulic system 40. The reinforcing rib plate 13 can be a rectangular tubular structure welded to the bottom wall of the protection plate body 11. Correspondingly, two reinforcing rib plates 13 are provided, which are respectively arranged corresponding to the two auxiliary support devices 3, that is, the two upper support members 32 are connected to the two reinforcing rib plates 13 one by one to enhance the connection strength between the upper protection plate 1 and the upper support member 32. The setting of the wing plates 12 facilitates the installation of the flip hinge assembly 4, and further realizes the flexible flipping between the upper protection plate 1 and the cargo box side plate 10.

[0045] As a specific implementation manner of the lengthened upper protection structure provided by the present utility model, see Figure 4 and Figure 5 , the flip hinge assembly 4 includes a flip shaft sleeve 41 connected to the cargo box side plate 10 and a flip pin shaft 42 rotatably connected in the flip shaft sleeve 41. The main shaft of the flip shaft sleeve 41 extends in the left-right direction. A wing plate shaft sleeve 121 sleeving the outer circumference of the flip pin shaft 42 is provided on the wing plate 12, and the wing plate shaft sleeve 121 is adjacent to the flip shaft sleeve 41.

[0046] In this embodiment, the flip shaft sleeve 41 is welded to the cargo box side plate 10. The wing plate shaft sleeve 121 is welded to the wing plate 12, and the thickness of the wing plate shaft sleeve 121 is greater than the thickness of the wing plate 12 to increase the sleeved area between the wing plate 12 and the flip pin shaft 42. It should be noted here that by inserting the flip pin shaft 42 into the wing plate shaft sleeve 121 and the flip shaft sleeve 41 in sequence, the rotational connection between the wing plate 12 and the cargo box side plate 10 can be realized, that is, when the lifting cylinder 2 is started, it can drive the upper protection plate 1 to flip upward through the flip hinge assembly 4. Therefore, the relationship between the flip pin shaft 42 and the wing plate shaft sleeve 121 and the relationship between the flip pin shaft 42 and the flip shaft sleeve 41 can both be set as a rotational fit relationship. On the basis of realizing the flipping action of the upper protection plate 1, it is also convenient for the flip pin shaft 42 to be easily inserted or taken out when disassembling and assembling the upper protection plate 1, improving the convenience of disassembly, installation, repair of the lengthened upper protection structure.

[0047] As a specific implementation manner of the lengthened upper protection structure provided by the present utility model, see Figure 5, a spiral oil groove 411 is provided on the inner peripheral wall of the rotation shaft sleeve 41. An oil filling passage 421 communicating with the oil groove 411 is provided in the rotation pin shaft 42. An oil filling port 423 communicating with the oil filling passage 421 is provided on the outer end surface of the rotation pin shaft 42. An oil cup 44 is connected to the oil filling port 423.

[0048] In this embodiment, the oil cup 44 is a straight-through pressure grease cup and is connected to the oil filling port 423 by a thread. Lubricating grease is injected into the oil filling passage 421 through the oil cup 44. The lubricating grease enters the oil groove 411 on the rotation shaft sleeve 41 through the oil filling passage 421 to lubricate the rotation shaft sleeve 41, thereby reducing the rotational wear between the rotation pin shaft 42 and the rotation shaft sleeve 41, extending the service life of the rotation pin shaft 42 and the rotation shaft sleeve 41, and enabling the flipping action of the upper protection plate 1 to be more flexible.

[0049] As a specific implementation manner of an extended upper protection structure provided by the present utility model, refer to Figure 5 , a wing plate flange 122 is connected to the outer side wall of the wing plate 12. The flipping hinge assembly 4 further includes a flange cover plate 43 located outside the wing plate flange 122. The flange cover plate 43 is connected to the wing plate 12 through a connecting member 47 penetrating through the wing plate flange 122. The flange cover plate 43 is located outside the rotation pin shaft 42 and is used to limit the axial outward movement of the rotation pin shaft 42. An avoidance hole 431 for the oil cup 44 to pass through is provided on the flange cover plate 43.

[0050] In this embodiment, the wing plate flange 122 is welded to the wing plate 12, and the flange cover plate 43 is connected to the outside of the wing plate flange 122 through the connecting member 47 to prevent the rotation pin shaft 42 from sliding outwards. The avoidance hole 431 provided on the flange cover plate 43 provides an operating space for the disassembly and assembly of the oil cup 44 on the one hand, and on the other hand, the installed oil cup 44 is located in the avoidance hole 431, reducing the length of the flipping hinge assembly 4, and thus helping to reduce the overall width of the extended upper protection structure.

[0051] As a specific implementation manner of an extended upper protection structure provided by the present utility model, refer to Figure 5 , a boss portion 422 protruding outwards is provided at the outer end of the rotation pin shaft 42. A first washer 45 is sleeved on the outer periphery of the rotation pin shaft 42. The first washer 45 is located between the boss portion 422 and the wing plate 12; a second washer 46 is provided between the wing plate 12 and the cargo box side plate 10. The second washer 46 is sleeved on the outer periphery of the wing plate shaft sleeve 121.

[0052] In this embodiment, the first washer 45 can reduce the friction between the boss portion 422 of the turning pin shaft 42 and the side wing plate 12, and the second washer 46 can reduce the friction between the side wing plate 12 and the cargo compartment side plate 10. This can help extend the service life of the turning hinge assembly 4 and increase the stability of the upper guard plate 1 during the turning process.

[0053] Based on the same inventive concept, the embodiment of the present application further provides a dump truck, including the lengthened upper guard structure proposed in any one of the foregoing.

[0054] Refer to Figure 6 and Figure 7 , the lengthened upper guard structure is located above the cab 30 of the dump truck to protect the safety of the cab 30 and the hydraulic system 40 located between the cab 30 and the cargo compartment. When it is necessary to turn the cab 30 for maintenance operations, the lengthened upper guard structure can be turned and opened first to avoid position interference with the upper guard plate 1 when turning the cab 30.

[0055] The beneficial effects of the dump truck provided in this embodiment are the same as those of the foregoing lengthened upper guard structure, and will not be elaborated here.

[0056] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An extended upper protective structure, characterized in that: It includes an upper protective plate, a lifting cylinder and an auxiliary support device, wherein the upper protective plate is rotatably connected to the cargo compartment side plate, the lifting cylinder is hinged between the cargo compartment front plate and the upper protective plate, and the auxiliary support device includes a lower support member connected to the cargo compartment front plate and an upper support member connected to the upper protective plate; Among them, the upper protective plate has a protective state when the lifting cylinder retracts and resets, and a flipping state when it flips to the upper side under the lifting action of the lifting cylinder. When the upper protective plate is in the flipping state, the lower support member is separated from the upper support member; when the upper protective plate is in the protective state, the lower support member can abut against the bottom of the upper support member to support the upper protective plate.

2. The extended upper protective structure according to claim 1, characterized in that: The upper support member includes a connecting plate connected to the bottom of the upper protective plate and an upper support block connected to the bottom of the connecting plate; the lower support member includes a connecting bracket connected to the front side of the front plate of the cargo compartment and a lower support block connected above the connecting bracket. When the upper protective plate is in a protective state, the lower support block is used to support the bottom of the upper support block.

3. The extended upper protective structure according to claim 2, characterized in that: The top of the lower support block is provided with an arc-shaped groove that is arc-shaped and concave downward, and the arc-shaped groove extends in the left-right direction. The bottom of the upper support block is provided with an arc-shaped bar that can match with the arc-shaped groove.

4. The extended upper protective structure according to claim 2, characterized in that: The connecting bracket includes a bracket upright plate connected to the front side of the cargo compartment front plate, an inclined support column connected to the front side wall of the bracket upright plate, and a bracket cross plate connected to the upper end of the inclined support column, the inclined support column gradually extends from bottom to top toward the front side, the bracket cross plate is arranged in a horizontal direction, and the lower support block is connected to the bracket cross plate.

5. The extended upper protective structure according to claim 1, characterized in that: The upper protective plate includes a protective plate body, side wing plates respectively connected to the left and right sides of the protective plate body, and a reinforcing rib plate connected to the bottom of the protective plate body, the upper support member is connected to the reinforcing rib plate, the side wing plates are located on the outside of the cargo compartment side plates, and a flip hinge assembly is connected between the side wing plates and the cargo compartment side plates.

6. The extended upper protective structure according to claim 5, characterized in that: The flip hinge assembly includes a flip sleeve connected to the side panel of the cargo compartment and a flip pin rotatably connected to the flip sleeve. The main axis of the flip sleeve extends in the left and right directions. The side wing plate is provided with a wing sleeve that is sleeved on the outer periphery of the flip pin. The wing sleeve is arranged adjacent to the flip sleeve.

7. The extended upper protective structure according to claim 6, characterized in that: A spirally arranged oil groove is provided on the inner circumferential wall of the flip sleeve, a refueling channel connected to the oil groove is provided in the flip pin shaft, a refueling port connected to the refueling channel is provided on the outer end surface of the flip pin shaft, and the refueling port is connected to an oil cup.

8. The extended upper protective structure according to claim 7, characterized in that: A wing plate flange is connected to the outer wall of the side wing plate, and the flip hinge assembly also includes a flange cover plate located on the outer side of the wing plate flange, and the flange cover plate is connected to the side wing plate via a connecting piece that passes through the wing plate flange. The flange cover plate is located on the outer side of the flip pin shaft and is used to limit the axial outward movement of the flip pin shaft, and the flange cover plate is provided with an avoidance hole for the oil cup to pass through.

9. The extended upper protective structure according to claim 8, characterized in that: The outer end of the flip pin is provided with a boss portion protruding toward the outer periphery, and the outer periphery of the flip pin is sleeved with a first washer, and the first washer is located between the boss portion and the side wing plate; a second washer is provided between the side wing plate and the cargo compartment side plate, and the second washer is sleeved on the outer periphery of the wing plate shaft sleeve.

10. A dump truck, characterized in that: It comprises an extended upper protective structure as described in any one of claims 1 to 9.

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