CN217124631U

CN217124631U - Protection device for dumper and dumper

Info

Publication number: CN217124631U
Application number: CN202221046529.3U
Authority: CN
Inventors: 郭宝成; 王俊刚; 鞠玉伟; 王绍田
Original assignee: Shandong Reza Special Purpose Vehicle Manufacturing Co ltd
Current assignee: Shandong Reza Special Purpose Vehicle Manufacturing Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-08-05
Anticipated expiration: 2032-04-22

Abstract

The disclosure relates to a protection device for a dump truck and the dump truck, wherein the dump truck comprises an auxiliary frame and a cargo compartment rotationally connected with the auxiliary frame, the protection device comprises an upper bracket and a lower bracket, the upper bracket and the lower bracket are hinged through a first hinge shaft and are respectively used for being hinged with the cargo compartment and the auxiliary frame, a first limit structure comprising a first limit part is arranged between the upper bracket and the lower bracket, the first limit part is fixedly arranged on the upper bracket and is provided with a first limit surface, the first hinge shaft is provided with a first plane matched with the first limit surface, the protection device is provided with a folding position and an unfolding position, the first limiting surface is in surface contact with the first plane at the folding position and the unfolding position, when the protection device is switched between the folding position and the unfolding position, an included angle is formed between the first limiting surface and the first plane, and the first limiting surface presses the first plane to force the first hinging shaft to rotate around the central axis of the first hinging shaft until the first plane is in surface contact with the first limiting surface. The lifting device can improve the stability of the dump truck in the lifting process.

Description

Protection device for dumper and dumper

Technical Field

The disclosure relates to the technical field of dump trucks, in particular to a protection device for a dump truck and the dump truck.

Background

In the existing dump truck, a cargo compartment rocks left and right during lifting, and in order to solve the problem, part of the dump trucks are provided with hydraulic oil cylinders in the middle of the cargo compartment to assist the cargo compartment to lift, so that the stability in the lifting process is improved.

SUMMERY OF THE UTILITY MODEL

The disclosure provides a protection device for a dump truck and the dump truck, which can realize the stability of the dump truck in the lifting process and have simple structure.

In order to achieve the above object, the present disclosure provides a protection device for a dump truck, the dump truck including a subframe and a cargo bed rotatably connected to the subframe, the protection device for a dump truck including an upper bracket and a lower bracket, the upper bracket and the lower bracket being hinged by a first hinge shaft and being respectively used for being hinged to the cargo bed and the subframe, a first limit structure being provided between the upper bracket and the lower bracket, the first limit structure including a first limit piece, the first limit piece being fixedly disposed on the upper bracket and having a first limit surface, the first hinge shaft being provided with a first plane for being matched with the first limit surface, the protection device for a dump truck having a folded position and an unfolded position, the first limit surface being in surface contact with the first plane at the folded position and the unfolded position, when the protection device for the dump truck is switched between the folding position and the unfolding position, an included angle is formed between the first limiting surface and the first plane, and the first limiting surface presses towards the first plane so as to force the first hinge shaft to rotate around the central axis of the first hinge shaft until the first plane is in surface contact with the first limiting surface.

Optionally, an articulated seat is fixedly arranged on the upper bracket, the first articulated shaft penetrates through the articulated seat, and the first limiting part is arranged on the articulated seat.

Optionally, the first limiting member is configured as a first limiting block, and the first limiting surface is formed on one side of the first limiting block facing the first hinge shaft.

Optionally, the first limiting structure further comprises a first split pin, a first through hole is formed in the end portion of the first hinge shaft, the first through hole penetrates through the first hinge shaft along the radial direction of the first hinge shaft, and the first split pin is arranged in the first through hole in a penetrating mode.

Optionally, the protection device for the dump truck further comprises an upper support, the upper support is hinged with the upper support through a second hinge shaft, a second limit structure is arranged between the upper bracket and the upper support and comprises a second limit piece, the second limiting piece is fixedly arranged on the upper support and is provided with a second limiting surface, the second articulated shaft is provided with a second plane matched with the second limiting surface, the second limiting surface is in surface contact with the second plane in the folding position and the unfolding position, when the protection device for the dumper is switched between the folding position and the unfolding position, an included angle is formed between the second limiting surface and the second plane, and the second limiting surface presses towards the second plane to force the second hinge shaft to rotate around the central axis of the second hinge shaft until the second plane is in surface contact with the second limiting surface.

Optionally, the second limiting member is configured as a second limiting member, and one side of the second limiting member facing the second hinge shaft forms the second limiting surface.

Optionally, the second limiting structure further includes a second cotter pin, a second through hole is formed in an end portion of the second hinge shaft, the second through hole penetrates through the second hinge shaft along a radial direction of the second hinge shaft, and the second cotter pin is arranged in the second through hole in a penetrating manner.

Optionally, the protection device for the dump truck further comprises a lower support, the lower support is hinged with the lower support through a third hinge shaft, a third limiting structure is arranged between the lower bracket and the lower support, the third limiting structure comprises a third limiting piece, the third limiting piece is fixedly arranged on the lower support and is provided with a third limiting surface, the third hinge shaft is provided with a third plane matched with the third limiting surface, the third stopper surface and the third plane are in planar contact in the folded position and the unfolded position, when the protection device for the dump truck is switched between the folding position and the unfolding position, an included angle is formed between the third limiting surface and the third plane, and the third limiting surface presses against the third plane to force the third hinge shaft to rotate around the central axis thereof until the third plane is in surface contact with the third limiting surface.

Optionally, the third limiting member is configured as a third limiting member, and a side of the third limiting member facing the third hinge shaft forms the third limiting surface.

Optionally, the third limiting structure further includes a third open pin, a third through hole is formed in an end portion of the third hinge shaft, the third through hole penetrates through the third hinge shaft along a radial direction of the third hinge shaft, and the third open pin is inserted into the third through hole.

Optionally, the lower support comprises a base and a lower support body, the base spans between the two longitudinal beams of the subframe in the width direction of the subframe and is connected with the two longitudinal beams of the subframe, and the lower support body is arranged on the base and is hinged to the lower support.

Optionally, the upper bracket is laid with a first reinforcing plate along the length direction thereof, and/or the lower bracket is laid with a second reinforcing plate along the length direction thereof.

The dump truck further comprises the protection device for the dump truck, and the protection device for the dump truck is connected between the cargo compartment and the auxiliary frame.

Through the technical scheme, the protection device for the dump truck is arranged between the auxiliary frame and the cargo compartment, when the protection device for the dump truck is in a folding position (at the moment, the cargo compartment is in a non-lifted state) and an unfolding position (at the moment, the cargo compartment is in a lifted state), a first limiting surface on the first limiting piece is in contact with a first plane on the first hinge shaft so as to limit the relative rotation of the upper support and the lower support, so that the cargo compartment is kept stable in position through the protection device for the dump truck, and when the protection device for the dump truck is in the folding position, the upper support and the lower support can be folded to the minimum volume, so that a small space can be occupied between the auxiliary frame and the cargo compartment as far as possible; when the protection device for the dump truck is in the unfolding position, the position of the cargo compartment can be kept relatively stable due to the fact that the first limiting surface is in contact with the first plane, and therefore when the oil cylinder fails in the lifting process, the protection device for the dump truck can prevent the cargo compartment from immediately descending, and precious escape time is reserved for maintenance personnel. When the protection device for the dump truck is switched between the folding position and the unfolding position, the first limiting surface of the first limiting member is always pressed to the first plane of the first hinge shaft, the included angle between the first limiting surface and the first plane is gradually increased from 0 degree to a certain angle and then gradually reduced to 0 degree, on one hand, the stability of the cargo compartment in the lifting process is improved, the first hinge shaft is prevented from shifting in the transverse direction during lifting by limiting the first hinge shaft during lifting, thereby preventing the cargo compartment from swinging freely along the transverse direction, finally realizing the purpose of improving the stability of the cargo compartment in the lifting process, on the other hand, the rotation amplitude of the first articulated shaft is limited through the interaction between the first limiting surface and the first plane, to prevent the failure of the protective device for the dump truck caused by the first hinge shaft coming out of the upper and lower brackets.

Additionally, other features and advantages of the present disclosure will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural view of a protection device for a dump truck according to the present disclosure;

FIG. 2 is another schematic structural view of the protection device for a dump truck of the present disclosure;

FIG. 3 is a schematic structural view of the dump truck of the present disclosure, wherein structures other than the cargo bed and the subframe are not shown;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 3;

FIG. 6 is an enlarged view at C in FIG. 3;

FIG. 7 is an enlarged view at D of FIG. 3;

FIG. 8 is an enlarged view at E in FIG. 3;

FIG. 9 is an enlarged view at F of FIG. 8;

FIG. 10 is another schematic structural view of the dump truck of the present disclosure with the protection device for the dump truck in a folded position;

fig. 11 is a further structural schematic view of the dump truck of the present disclosure with the protection device for the dump truck in the deployed position.

Description of the reference numerals

1-auxiliary frame; 2-a cargo compartment; 3-a protection device for the dump truck; 30-upper support; 301-a hinged mount; 302-a first stiffener plate; 31-lower support; 311-a second stiffener plate; 32-a first articulated shaft; 321-a first plane; 322-a first via; 33-a first limit structure; 331-a first limiting member; 3311-a first stopper; 3311 a-a first limiting surface; 332 — a first cotter pin; 34-an upper support; 35-a second articulated shaft; 351-a second plane; 352-second via; 36-a second limit structure; 361-a second limit stop; 3611-a second stopper; 3611 a-a second limit surface; 362-a second cotter pin; 37-lower support; 371-base; 372-lower support body; 38-a third hinge axis; 381-third plane; 382-a third via; 39-a third limit structure; 391-a third limiting member; 3911-a third stopper; 3911 a-a third limiting surface; 392-third cotter pin.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of the directional terms such as "upper and lower" generally means "upper and lower" in the gravity direction when the respective components are in the use state, unless otherwise specified. In addition, it should be noted that terms such as "first", "second", and the like are used to distinguish one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements. The foregoing definitions are provided to illustrate and describe the present disclosure only and should not be construed to limit the present disclosure.

Referring to fig. 1 to 3, 6 and 7, the present disclosure provides a protection device 3 for a dump truck, the dump truck including a subframe 1 and a cargo bed 2 rotatably connected to the subframe 1, the protection device 3 for a dump truck including an upper bracket 30 and a lower bracket 31, the upper bracket 30 and the lower bracket 31 being hinged by a first hinge shaft 32 and for being hinged to the cargo bed 2 and the subframe 1, respectively, a first limit structure 33 being disposed between the upper bracket 30 and the lower bracket 31, the first limit structure 33 including a first limit member 331, the first limit member 331 being fixedly disposed to the upper bracket 30 and having a first limit surface 3311a, the first hinge shaft 32 being provided with a first plane 321 for cooperating with the first limit surface 3311a, the protection device 3 for a dump truck having a folded position and an unfolded position, the first limit surface 3311a being in surface contact with the first plane 331321 in the folded position and the unfolded position, when the protection device 3 for the dump truck is switched between the folded position and the unfolded position, the first position-limiting surface 3311a forms an included angle with the first plane 321, and the first position-limiting surface 3311a presses against the first plane 321 to force the first hinge shaft 32 to rotate around the central axis thereof until the first plane 321 comes into surface contact with the first position-limiting surface 3311 a.

With the above technical solution, the protection device 3 for the dump truck provided by the present disclosure is disposed between the subframe 1 and the cargo bed 2, when the protection device 3 for the dump truck is in the folded position (at this time, the cargo bed 2 is in a non-lifted state) and the unfolded position (at this time, the cargo bed 2 is in a lifted state), the first position-limiting surface 3311a on the first position-limiting member 331 is in surface contact with the first plane 321 on the first hinge shaft 32 to limit the relative rotation between the upper bracket 30 and the lower bracket 31, so that the cargo bed 2 is kept stable in position by the protection device 3 for the dump truck, and, when the protection device 3 for the dump truck is in the folded position, the upper bracket 30 and the lower bracket 31 can be folded to a minimum volume, so that a small space can be occupied between the subframe 1 and the cargo bed 2 as much as possible; when the protection device 3 for the dump truck is in the unfolded position, the position of the cargo compartment 2 can be kept relatively stable due to the contact of the first limit surface 3311a and the first plane 321, so that when the oil cylinder fails in the lifting process, the protection device 3 for the dump truck can prevent the cargo compartment 2 from immediately descending, and precious escape time is reserved for maintenance personnel. When the protection device 3 for the dump truck is switched between the folded position and the unfolded position, the first position-limiting surface 3311a of the first position-limiting member 331 is always pressed against the first plane 321 of the first hinge shaft 32, an included angle between the first position-limiting surface 3311a and the first plane 321 is gradually increased from 0 degree to a certain angle and then gradually decreased to 0 degree, on one hand, in order to improve the stability of the cargo compartment 2 during the lifting process, the first hinge shaft 32 is prevented from shifting in the lateral direction during lifting by the restriction of the first hinge shaft 32 during lifting, thereby preventing the cargo box 2 from swinging freely along the transverse direction, and finally achieving the purpose of improving the stability of the cargo box 2 in the lifting process, on the other hand, the rotation amplitude of the first hinge shaft 32 is limited by the interaction between the first limit surface 3311a and the first plane 321, to prevent the failure of the protection device 3 for the dump truck caused by the first hinge shaft 32 coming out of the upper and

lower brackets

30 and 31.

The switching of the protection device 3 for the dump truck between the folded position and the unfolded position includes two cases, the first is a process of switching the protection device 3 for the dump truck from the folded position to the unfolded position, and the second is a process of switching the protection device 3 for the dump truck from the unfolded position to the folded position. Two cases are explained in detail below:

when the protection device 3 for the dump truck is switched from the folding position to the unfolding position, the cargo compartment 2 lifted by the lifting cylinder firstly drives the upper bracket 30 to move and then drives the lower bracket 31 to move through the upper bracket 30, in the process, the first limit surface 3311a of the first limit piece 331 is always pressed to the first plane 321 of the first hinge shaft 32, the included angle between the first limit surface 3311a and the first plane 321 is gradually increased from 0 degree to a certain angle and then gradually reduced to 0 degree, on one hand, in order to improve the stability of the cargo compartment 2 in the lifting process, the first hinge shaft 32 in the lifting process is prevented from moving along the transverse direction by limiting the first hinge shaft 32 in the lifting process, and further the cargo compartment 2 is prevented from swinging randomly along the transverse direction, so as to finally realize the purpose of improving the stability of the cargo compartment 2 in the lifting process, on the other hand, the rotation amplitude of the first hinge shaft 32 is limited through the interaction between the first limit surface 3311a and the first plane 321, to prevent the failure of the protection device 3 for the dump truck caused by the first hinge shaft 32 coming out of the upper and lower brackets 30 and 31.

When the protection device 3 for the dump truck is switched from the unfolding position to the folding position, the lifting oil cylinder drives the cargo compartment 2 to descend, the upper bracket 30 and the lower bracket 31 are driven to move through the movement of the cargo compartment 2, in the process, the first limit surface 3311a of the first limit piece 331 is always pressed against the first plane 321 of the first hinge shaft 32, an included angle between the first limit piece and the first plane 321 is gradually increased from 0 degree to a certain angle and then gradually reduced to 0 degree, on one hand, in order to improve the stability of the cargo compartment 2 in the lifting process, the first hinge shaft 32 is prevented from moving along the transverse direction in the lifting process through the limitation of the first hinge shaft 32 in the lifting process, so that the cargo compartment 2 is prevented from swinging randomly along the transverse direction, the purpose of improving the stability of the cargo compartment 2 in the lifting process is finally realized, on the other hand, the rotation amplitude of the first hinge shaft 32 is limited through the interaction between the first limit surface 3311a and the first plane 321, to prevent the failure of the protection device 3 for the dump truck caused by the first hinge shaft 32 coming out of the upper and lower brackets 30 and 31.

It should be noted that "lateral" is defined based on the dump truck, and defines the position of the front end of the dump truck as "front", and the position of the rear end of the dump truck as "rear", and the lateral direction corresponds to the left and right positions of the dump truck.

In the embodiment provided by the present disclosure, referring to fig. 1, 6 and 7, a hinge base 301 is fixedly disposed on the upper bracket 30, the first hinge shaft 32 is inserted into the hinge base 301, and the first limiting member 331 is disposed on the hinge base 301, so as to facilitate the connection between the upper bracket 30 and the lower bracket 31. Wherein hinge base 301 may be configured in any suitable manner, as the present disclosure is not limited in this respect. In the present disclosure, the upper bracket 30 includes two support beams parallel to each other, and the end portions of the two support beams are each provided with a hinge base 301, and in this embodiment, the hinge base 301 may be configured to include two hinge plates disposed parallel to each other on both sides of the support beams, through which the first hinge shaft 32 is hinge-jointed to the lower bracket 31.

In the specific embodiments provided by the present disclosure, the first limiting member 331 may be configured in any suitable manner. Alternatively, referring to fig. 7, the first limiting member 331 may be configured as a first limiting member 3311, and a first limiting surface 3311a is formed at a side of the first limiting member 3311 facing the first hinge shaft 32. In addition, the first limiting block 3311 may also be a cube, a semi-cylinder, a U-shaped cylinder, or the like fixedly disposed on the outer side of the hinge base 301, which is not limited by the disclosure, and the object of the disclosure can be achieved. The hinge plate on one side of each support beam may be provided with a first limiting member 331 to limit the first hinge shaft 32.

In the specific embodiment provided by the present disclosure, referring to fig. 6, the first limiting structure 33 further includes a first cotter pin 332, the end of the first hinge shaft 32 is provided with a first through hole 322, the first through hole 322 penetrates through the first hinge shaft 32 along the radial direction of the first hinge shaft 32, and the first cotter pin 332 is inserted into the first through hole 322. Through such an arrangement, the movement of the cargo box 2 in the lateral direction during the lifting process can be further restricted, thereby ensuring the stability of the cargo box 2 during the lifting process, and in addition, the first hinge shaft 32 can be further prevented from coming out of the upper bracket 30 and the lower bracket 31, thereby avoiding the failure of the protection device 3 for the dump truck.

In the embodiment provided by the present disclosure, referring to fig. 5, the protection device 3 for the dump truck further includes an upper support 34, the upper support 34 is hinged to the upper support 30 through a second hinge shaft 35, a second limiting structure 36 is disposed between the upper support 30 and the upper support 34, the second limiting structure 36 includes a second limiting member 361, the second limiting member 361 is fixedly disposed on the upper support 34 and has a second limiting surface 3611a, the second hinge shaft 35 is provided with a second plane 351 for cooperating with the second limiting surface 3611a, in the folded position and the unfolded position, the second stopper surface 3611a is in surface contact with the second plane 351, when the protection device 3 for the dump truck is switched between the folding position and the unfolding position, an included angle is formed between the second limiting surface 3611a and the second plane 351, and the second stopper surface 3611a is pressed toward the second plane 351 to force the second hinge shaft 35 to rotate about its central axis until the second plane 351 comes into surface contact with the second stopper surface 3611 a.

Through the technical scheme, the protection device 3 for the dump truck provided by the disclosure is arranged between the auxiliary frame 1 and the cargo compartment 2, and the protection device 3 for the dump truck is connected with the bottom of the cargo compartment 2 through the upper support 34. When the protection device 3 for the dump truck is in the folded position (when the cargo bed 2 is in the non-lifted state) and the unfolded position (when the cargo bed 2 is in the lifted state), the second position-limiting surface 3611a is in surface contact with the second plane 351 to limit the relative rotation between the upper support 34 and the upper bracket 30, so as to further achieve the purpose of stably maintaining the cargo bed 2 at the position through the protection device 3 for the dump truck. Also, when the protection device 3 for the dump truck is in the folded position, the upper seat 34 and the upper bracket 30 can be folded to a minimum volume, so that a small space can be occupied between the cargo box 2 and the subframe 1 as much as possible; when the subframe 1 is in the unfolded position, the cargo compartment 2 can be kept relatively stable in the position due to the contact of the second limiting surface 3611a with the second plane 351, so that when the oil cylinder fails during lifting, the protection device 3 for the dump truck can further prevent the cargo compartment 2 from immediately descending through the arrangement, and valuable escape time is reserved for maintenance personnel. When the protection device 3 for the dump truck is switched between the folded position and the unfolded position, the second limiting surface 3611a of the second limiting member 361 always presses against the second plane 351 of the second hinge shaft 35, the included angle between the second limiting surface 3611a and the second plane 351 gradually increases from 0 degrees to a certain angle and then gradually decreases to 0 degrees, on one hand, in order to further improve the stability of the cargo box 2 in the lifting process, the second hinge shaft 35 is prevented from shifting in the lateral direction during lifting by the restriction of the second hinge shaft 35 during lifting, thereby preventing the cargo box 2 from swinging freely along the transverse direction, and finally achieving the purpose of further improving the stability of the cargo box 2 in the lifting process, on the other hand, the rotation amplitude of the second hinge shaft 35 is limited by the interaction between the second stopper surface 3611a and the second plane 351, to prevent the failure of the protection device 3 for the dump truck caused by the second hinge shaft 35 coming out of the upper bracket 30 and the upper seat 34.

when the protection device 3 for the dump truck is switched from the folding position to the unfolding position, the cargo compartment 2 lifted by the lifting cylinder drives the upper bracket 30 to move so as to drive the lower bracket 31 to move, and the upper bracket 30 is fixed at the bottom of the cargo compartment 2 through the upper support 34, and the upper bracket 30 is hinged with the upper support 34 through the second hinge shaft 35, so that the upper support 34 also moves, in the process, the second limiting surface 3611a of the second limiting member 361 always presses against the second plane 351 of the second hinge shaft 35, an included angle between the second limiting surface 3611a and the second plane 351 gradually increases from 0 degrees to a certain angle and then gradually decreases to 0 degrees, on one hand, in order to improve the stability of the cargo compartment 2 in the lifting process, the second hinge shaft 35 in the lifting process is limited to prevent the second hinge shaft 35 from moving along the transverse direction, and further, the cargo box 2 is prevented from freely swinging in the lateral direction to finally achieve the purpose of improving the stability of the cargo box 2 during lifting, and on the other hand, the rotation amplitude of the second hinge shaft 35 is limited by the interaction between the second limiting surface 3611a and the second plane 351, so as to prevent the failure of the protection device 3 for the dump truck caused by the second hinge shaft 35 falling out of the upper bracket 30 and the upper seat 34.

When the protection device 3 for the dump truck is switched from the unfolding position to the folding position, the lifting oil cylinder drives the cargo compartment 2 to descend, the upper support 30 and the lower support 31 are driven to move through the movement of the cargo compartment 2, the upper support 30 is fixed at the bottom of the cargo compartment 2 through the upper support 34, and the upper support 30 is hinged with the upper support 34 through the second hinge shaft 35, so that the upper support 34 also moves along with the upper support, in the process, the second limiting surface 3611a of the second limiting piece 361 is always pressed against the second plane 351 of the second hinge shaft 35, an included angle between the second limiting surface 3611a and the second plane 351 of the second hinge shaft 35 is gradually increased from 0 degrees to a certain angle and then gradually decreased to 0 degrees, on one hand, in order to improve the stability of the cargo compartment 2 in the lifting process, the second hinge shaft 35 in the lifting process is limited to prevent the second hinge shaft 35 from shifting in the lifting process, and further prevent the cargo compartment 2 from swinging randomly in the transverse direction, to finally achieve the purpose of improving the stability of the cargo box 2 during lifting, and on the other hand, the rotation amplitude of the second hinge shaft 35 is limited by the interaction between the second limiting surface 3611a and the second plane 351, so as to prevent the failure of the protection device 3 for the dump truck caused by the second hinge shaft 35 coming out of the upper bracket 30 and the upper seat 34.

In the specific embodiments provided by the present disclosure, the second limiting member 361 may be configured in any suitable manner. Alternatively, referring to fig. 5, the second limiting member 361 is configured as a second limiting member 3611, and a side of the second limiting member 3611 facing the second hinge shaft 35 forms a second limiting surface 3611 a. Here, the second stopper 3611 may be a cube, a semi-cylinder, a U-shaped column, etc. fixedly disposed on the outer side of the upper support 34, which is not limited in the present disclosure, and specifically, the object of the present disclosure can be achieved.

In the specific embodiment provided by the present disclosure, referring to fig. 4, the second limiting structure 36 may further include a second cotter pin 362, an end of the second hinge shaft 35 is provided with a second through hole 352, the second through hole 352 penetrates through the second hinge shaft 35 along a radial direction of the second hinge shaft 35, and the second cotter pin 362 is inserted in the second through hole 352. Through such an arrangement, any movement of the cargo box 2 in the transverse direction during the lifting process can be further limited, so that the stability of the cargo box 2 during the lifting process can be ensured, and in addition, the second hinge shaft 35 can be further prevented from being disengaged from the upper support 34 and the upper bracket 30, and the failure of the protection device 3 for the dump truck can be avoided.

In the embodiment provided by the present disclosure, referring to fig. 8 and 9, the protection device 3 for the dump truck may further include a lower support 37, the lower support 37 is hinged to the lower support 31 through a third hinge shaft 38, a third limiting structure 39 is disposed between the lower support 31 and the lower support 37, the third limiting structure 39 includes a third limiting member 391, the third limiting member 391 is fixed to the lower support 37 and has a third limiting surface 3911a, the third hinge shaft 38 is provided with a third plane 381 for matching with the third limiting surface 3911a, in the folded position and the unfolded position, the third stopper face 3911a is in face contact with the third plane 381, when the protection device 3 for the dump truck is switched between the folded position and the unfolded position, an included angle is formed between the third limiting surface 3911a and the third plane 381, and the third stopper surface 3911a presses against the third plane 381 to force the third hinge shaft 38 to rotate about its central axis until the third plane 381 comes into surface contact with the third stopper surface 3911 a.

Through the technical scheme, the protection device 3 for the dump truck provided by the disclosure is arranged between the auxiliary frame 1 and the cargo compartment 2, and the protection device 3 for the dump truck is connected with the auxiliary frame 1 through the lower support 37. When the protection device 3 for the dump truck is in the folded position (at this time, the cargo bed 2 is in a non-lifted state) and the unfolded position (at this time, the cargo bed 2 is in a lifted state), the third limiting surface 3911a is in surface contact with the third plane 381 to limit the relative rotation between the lower bracket 31 and the lower support 37, so as to further achieve the purpose of stably keeping the cargo bed 2 at the position by the protection device 3 for the dump truck. Also, when the protection device 3 for the dump truck is in the folded position, the lower bracket 31 and the lower seat 37 can be folded to a minimum volume, so that a small space can be occupied between the cargo box 2 and the subframe 1 as much as possible; when the protection device 3 for the dump truck is in the unfolded position, the cargo compartment 2 can be kept relatively stable in the position due to the surface contact of the third limiting surface 3911a and the third plane 381, so when the oil cylinder fails in the lifting process, the protection device 3 for the dump truck can further prevent the cargo compartment 2 from immediately descending through the arrangement, and valuable escape time is reserved for maintenance personnel. When the protection device 3 for the dump truck is switched between the folded position and the unfolded position, the third limiting surface 3911a of the third limiting member 391 is always pressed against the third plane 381 of the third hinge shaft 38, an included angle between the third limiting surface 3911a and the third plane 381 gradually increases from 0 ° to a certain angle and then gradually decreases to 0 °, on the one hand, in order to further improve the stability of the cargo compartment 2 during the lifting process, the third hinge shaft 38 is prevented from shifting in the lateral direction during lifting by the restriction of the third hinge shaft 38 during lifting, thereby preventing the cargo box 2 from swinging freely along the transverse direction, and finally achieving the purpose of further improving the stability of the cargo box 2 in the lifting process, on the other hand, the rotation amplitude of the third hinge shaft 38 is limited by the interaction between the third stopper surface 3911a and the third plane 381, to prevent the failure of the protection device 3 for the dump truck caused by the third hinge shaft 38 coming out of the lower bracket 31 and the lower mount 37.

when the protection device 3 for the dump truck is switched from the folding position to the unfolding position, the cargo compartment 2 lifted by the lifting cylinder firstly drives the upper bracket 30 to move, and then drives the lower bracket 31 to move through the upper bracket 30, and because the lower bracket 31 is hinged with the lower support 37 through the third hinge shaft 38, the lower support 37 also moves along with the upper bracket, in the process, the third limiting surface 3911a of the third limiting member 391 always presses against the third plane 381 of the third hinge shaft 38, the included angle between the third limiting surface 3911a and the third plane 381 gradually increases from 0 degrees to a certain angle and then gradually decreases to 0 degrees, on one hand, in order to improve the stability of the cargo compartment 2 in the lifting process, the third hinge shaft 38 is prevented from shifting along the transverse direction in the lifting process through the limitation on the third hinge shaft 38 in the lifting process, so as to prevent the cargo compartment 2 from swinging along the transverse direction at will, and finally realize the purpose of the stability of the cargo compartment 2 in the lifting process, on the other hand, the rotation amplitude of the third hinge shaft 38 is limited by the interaction between the third stopper surface 3911a and the third plane 381, so that the failure of the protection device 3 for the dump truck caused by the third hinge shaft 38 coming out of the lower bracket 31 and the lower holder 37 is prevented.

When the protection device 3 for the dump truck is switched from the unfolding position to the folding position, the lifting oil cylinder drives the cargo compartment 2 to descend, the upper support 30 and the lower support 31 are driven to move through the movement of the cargo compartment 2, and the lower support 37 also moves along with the lower support 31 because the lower support 31 is hinged with the lower support 37 through the third hinge shaft 38, in the process, the third limit surface 3911a of the third limit part 391 always presses against the third plane 381 of the third hinge shaft 38, the included angle between the third limit part and the third plane 381 starts to be gradually reduced to 0 degree after gradually increasing from 0 degree to a certain angle, on one hand, in order to improve the stability of the cargo compartment 2 in the lifting process, the third hinge shaft 38 is prevented from moving along the transverse direction in the lifting process through the limitation on the third hinge shaft 38 in the lifting process, and further, the cargo compartment 2 is prevented from swinging along the transverse direction, so as to finally realize the purpose of freely improving the stability of the cargo compartment 2 in the lifting process, on the other hand, the rotation amplitude of the third hinge shaft 38 is limited by the interaction between the third stopper surface 3911a and the third plane 381, so that the failure of the protection device 3 for the dump truck caused by the third hinge shaft 38 coming out of the lower bracket 31 and the lower holder 37 is prevented.

In the specific embodiments provided by the present disclosure, the third limiting member 391 may be configured in any suitable manner. Alternatively, referring to fig. 9, the third limiting member 391 is configured as a third limiting member 3911, and a side of the third limiting member 3911 facing the third hinge shaft 38 forms a third limiting surface 3911 a. Here, the third stopper 3911 may be a cube, a semi-cylinder, a U-shaped column, and the like fixedly disposed on the outer side of the lower support 37, which is not limited by the disclosure, and the purpose of the disclosure can be achieved specifically.

In the specific embodiment provided by the present disclosure, referring to fig. 8, the third limiting structure 39 may further include a third opening pin 392, an end of the third hinge shaft 38 is provided with a third through hole 382, the third through hole 382 penetrates through the third hinge shaft 38 along a radial direction of the third hinge shaft 38, and the third opening pin 392 is inserted into the third through hole 382. Through such an arrangement, any movement of the cargo box 2 in the lateral direction during the lifting process can be further restricted, thereby ensuring the stability of the cargo box 2 during the lifting process, and in addition, the third hinge shaft 38 can be further prevented from coming off from the lower support 37 and the lower bracket 31, thereby avoiding the failure of the protection device 3 for the dump truck.

In the particular embodiments provided by the present disclosure, the lower mount 37 may be configured in any suitable manner. Alternatively, the lower bracket 37 includes a base 371 and a lower bracket 37 body, the base 371 spans between two longitudinal beams of the subframe 1 in the width direction of the subframe 1 and is connected to the two longitudinal beams of the subframe 1, and the lower bracket 37 body is disposed on the base 371 and is hinged to the lower bracket 31. In this way, since the lower bracket 37 is connected to the subframe 1 by spanning between the two longitudinal members of the subframe 1, the lower bracket 31 is not limited to the installation position of the existing cross member in the subframe 1 when connected to the subframe 1 by the lower bracket 37, but can be flexibly adjusted according to the actual situation.

In the embodiment provided by the present disclosure, referring to fig. 3, the upper bracket 30 may be laid with a first reinforcing plate 302 along its length, which is provided to improve the structural strength of the upper bracket 30. Here, the first reinforcing plate 302 may be configured in any suitable manner, and the present disclosure is not limited thereto, and the first reinforcing plate 302 may be a stainless steel plate laid on the surface of the upper bracket 30, for example.

In the embodiment provided by the present disclosure, referring to fig. 3, the lower bracket 31 may be laid with a second reinforcing plate 311 along the length direction thereof, which is provided to improve the structural strength of the lower bracket 31. Here, the second reinforcing plate 311 may be configured in any suitable manner, and the present disclosure is not limited thereto, and the second reinforcing plate 311 may be a stainless steel plate laid on the surface of the lower bracket 31, for example.

In the embodiment provided by the present disclosure, referring to fig. 3, the first reinforcing plate 302 is laid on the upper bracket 30 along the length direction thereof, and the second reinforcing plate 311 is laid on the lower bracket 31 along the length direction thereof, which are provided to improve the structural strength of the upper bracket 30 and the lower bracket 31, thereby improving the overall structural strength of the protection device 3 for the dump truck. The arrangement of the first reinforcing plate 302 and the second reinforcing plate 311 has already been described in the foregoing, and therefore, the description thereof is omitted here.

On the basis of the technical scheme, the self-dumping truck also comprises a truck body, wherein the truck body is provided with a cargo compartment 2 and an auxiliary frame 1, the cargo compartment 2 is rotatably arranged on the auxiliary frame 1, the self-dumping truck also comprises the protection device 3 for the self-dumping truck, and the protection device 3 for the self-dumping truck is connected between the cargo compartment 2 and the auxiliary frame 1.

Referring to fig. 1 to 11, in use, first, the cargo compartment 2 is lifted by the lift cylinder, and as the cargo compartment 2 is lifted, the protection device 3 for the dump truck disposed between the cargo compartment 2 and the subframe 1 is also switched from the folded position to the unfolded position, and when the cargo compartment 2 is lifted to the unloading position, the protection device 3 for the dump truck is also switched to the unfolded position, at which time, the included angle between the lower bracket 31 of the protection device 3 for the dump truck and the plane of the subframe 1 is close to 90 °, and the first limit surface 1a of the first limit member 331 is in surface contact with the first plane 321 of the first hinge shaft 32, the second limit surface 3611a of the second limit member 361 is in surface contact with the second plane 351 of the second limit member 35, the third limit surface 3911a of the third limit member 391 is in surface contact with the third plane 381 of the third hinge shaft 38, and the hinge shaft 3311 is in this time, the protection device 3 for the dump truck is kept in a relatively stable state at the unfolded position, the cargo compartment 2 is unloaded smoothly, after the unloading of the cargo on the cargo compartment 2 is completed, the lift cylinder is operated again to descend, the protection device 3 for the dump truck is also switched from the unfolded position to the folded position with the descent of the cargo compartment 2, and the protection device 3 for the dump truck is also switched to the folded position when the lift cylinder descends to the initial state, at this time, the protection device 3 for the dump truck is accommodated between the cargo compartment 2 and the sub-frame 1.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A protection device for a dump truck, the dump truck comprising an auxiliary frame and a cargo compartment rotationally connected to the auxiliary frame, characterized in that the protection device for the dump truck comprises an upper bracket and a lower bracket, the upper bracket and the lower bracket are hinged through a first hinge shaft and are respectively used for being hinged with the cargo compartment and the auxiliary frame, a first limit structure is arranged between the upper bracket and the lower bracket, the first limit structure comprises a first limit part, the first limit part is fixedly arranged on the upper bracket and is provided with a first limit surface, the first hinge shaft is provided with a first plane used for being matched with the first limit surface, the protection device for the dump truck is provided with a folding position and an unfolding position,

when the protection device for the dump truck is switched between the folding position and the unfolding position, an included angle is formed between the first limiting surface and the first plane, and the first limiting surface presses towards the first plane so as to force the first hinged shaft to rotate around the central axis of the first hinged shaft until the first plane is in surface contact with the first limiting surface.

2. The protection device for the dump truck according to claim 1, wherein a hinge seat is fixedly arranged on the upper bracket, the first hinge shaft is arranged on the hinge seat in a penetrating manner, and the first limiting member is arranged on the hinge seat.

3. The protection device for the dump truck according to claim 2, wherein the first stopper is configured as a first stopper, and a side of the first stopper facing the first hinge shaft is formed with the first stopper surface.

4. The protection device for the dump truck according to claim 1, wherein the first limiting structure further comprises a first open pin, a first through hole is formed in an end portion of the first hinge shaft, the first through hole penetrates through the first hinge shaft in a radial direction of the first hinge shaft, and the first open pin is inserted into the first through hole.

5. The protection device for the dump truck according to claim 1, wherein the protection device for the dump truck further comprises an upper support, the upper support is hinged to the upper bracket through a second hinge shaft, a second limit structure is arranged between the upper bracket and the upper support, the second limit structure comprises a second limit member, the second limit member is fixedly arranged on the upper support and has a second limit surface, the second hinge shaft is provided with a second plane for matching with the second limit surface,

when the protection device for the dump truck is switched between the folding position and the unfolding position, an included angle is formed between the second limiting surface and the second plane, and the second limiting surface presses towards the second plane so as to force the second hinged shaft to rotate around the central axis of the second hinged shaft until the second plane is in surface contact with the second limiting surface.

6. The protection device for the dump truck according to claim 5, wherein the second stopper is configured as a second stopper, and a side of the second stopper facing the second hinge shaft forms the second stopper surface.

7. The protection device for the dump truck according to claim 5, wherein the second limiting structure further comprises a second cotter pin, a second through hole is formed in an end portion of the second hinge shaft, the second through hole penetrates through the second hinge shaft along a radial direction of the second hinge shaft, and the second cotter pin is inserted into the second through hole.

8. The protection device for the dump truck according to claim 1, wherein the protection device for the dump truck further comprises a lower support, the lower support is hinged to the lower support through a third hinge shaft, a third limiting structure is arranged between the lower support and the lower support, the third limiting structure comprises a third limiting member, the third limiting member is fixedly arranged on the lower support and has a third limiting surface, the third hinge shaft is provided with a third plane for matching with the third limiting surface,

when the protection device for the dump truck is switched between the folding position and the unfolding position, an included angle is formed between the third limiting surface and the third plane, and the third limiting surface presses towards the third plane so as to force the third hinge shaft to rotate around the central axis of the third hinge shaft until the third plane is in surface contact with the third limiting surface.

9. The protection device for the dump truck according to claim 8, wherein the third stopper is configured as a third stopper, and a side of the third stopper facing the third hinge shaft forms the third stopper surface.

10. The protection device for the dump truck according to claim 8, wherein the third limiting structure further comprises a third open pin, a third through hole is formed in an end portion of the third hinge shaft, the third through hole penetrates through the third hinge shaft along a radial direction of the third hinge shaft, and the third open pin is arranged in the third through hole in a penetrating manner.

11. The protection device for the dump truck according to claim 8, wherein the under-bearer comprises a base and an under-bearer body, the base spans between and is connected to the two longitudinal beams of the subframe in a width direction of the subframe, and the under-bearer body is provided on the base and is hinged to the under-bearer.

12. The protection device for the dump truck according to any one of claims 1 to 11, wherein the upper bracket is laid with a first reinforcement plate along a length direction thereof, and/or,

and a second reinforcing plate is laid on the lower bracket along the length direction of the lower bracket.

13. A dump truck comprising a truck body having a cargo compartment and a subframe on which the cargo compartment is rotatably provided, characterized in that the dump truck further comprises a protection device for a dump truck according to any one of claims 1 to 12, the protection device for a dump truck being connected between the cargo compartment and the subframe.