Frame structure of self-discharging semitrailer

Abstract

The invention discloses a frame structure of a self-unloading semitrailer, which relates to the technical field of semitrailers and comprises a chassis, a frame is mounted on the chassis, a connecting seat is movably mounted on the frame, a first connecting frame is transversely and uniformly arranged at the center of the chassis, a driving mechanism is arranged between the frame and the first connecting frame, and the frame is movably mounted on the chassis through the driving mechanism. An extending supporting mechanism is arranged on the side edge of the chassis, and a turnover mechanism is further arranged between the frame and the first connecting frame. The extension supporting mechanism comprises first telescopic columns arranged on the inner side of the first connecting frame, the first telescopic columns are symmetrically arranged on the two sides of the chassis, the ends of the first telescopic columns are connected with rotating motors, second telescopic columns are arranged on the rotating motors, the first telescopic columns and the second telescopic columns are perpendicularly arranged, and supporting bases are arranged at the ends of the second telescopic columns. Translation of the frame and the connecting base is achieved through the driving mechanism, overturning of the connecting base and the top compartment is achieved in combination with the overturning mechanism, and therefore unloading operation is conducted.

Description

Technical Field

[0001] The invention relates to the technical field of semi-trailers, in particular to a frame structure of a dump-type semi-trailer. Background Art

[0002] Dump trailer is a common transport vehicle. It has a special compartment structure and can realize the function of automatic unloading of goods through hydraulic devices or other means. This vehicle is usually used to transport bulk materials such as sand, earth, ore, etc., and has the characteristics of large loading capacity and high unloading efficiency.

[0003] There are two main ways to unload cargo from existing dump trailers. One is to use a hydraulic rod to directly lift one end of the truck bed so that the cargo leaves the truck bed from the rear. This unloading method requires a large-sized hydraulic rod, and the hydraulic rod system occupies a large volume. The other is to use a hydraulic rod to control the truck bed to flip toward one side of the vehicle. After the side panels of the truck bed are opened, the cargo is unloaded. This method uses a smaller hydraulic rod, but the unloaded cargo is easy to fall between the wheels, affecting the subsequent vehicle's departure. Summary of the invention

[0004] The object of the present invention is to provide a dump trailer frame structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A frame structure of a dump trailer comprises a chassis, a frame is mounted on the chassis, a connecting seat is movably mounted on the frame, a connecting frame 1 is evenly arranged laterally at the center of the chassis, a driving mechanism is arranged between the frame and the connecting frame 1, the frame is movably mounted between the driving mechanism and the chassis, an extending support mechanism is arranged on the side of the chassis, and a flipping mechanism is also arranged between the frame and the connecting frame 1.

[0006] The extension support mechanism includes a telescopic column 1 arranged on the inner side of a connecting frame 1, the telescopic column 1 is symmetrically arranged on both sides of the chassis, the end of the telescopic column 1 is connected to a rotating motor, and a telescopic column 2 is arranged on the rotating motor. The telescopic column 1 and the telescopic column 2 are arranged vertically, and a support seat is arranged at the end of the telescopic column 2.

[0007] As a further solution of the present invention: a connecting frame 2 is arranged at a position on the inner side of the frame corresponding to the connecting frame 1, L-shaped frames are arranged on both sides of the connecting frame 2, matching pulleys are arranged on the L-shaped frames, side guide rails are arranged on the sides of the connecting frame 1, and the L-shaped frames are slidably installed between the matching pulleys and the side guide rails.

[0008] As a further solution of the present invention: the driving mechanism includes an arc frame arranged on both sides of a connecting frame, the arc frame is fixedly connected to a connecting frame, an arc groove is arranged in the arc frame, a vertical frame is slidably installed in the arc groove, an arc rack is arranged on the edge of the arc groove, a matching gear is rotatably installed on the vertical frame, the matching gear and the arc rack are meshed with each other, the matching gear is connected to a driving motor, a hydraulic column is installed on the top of the vertical frame, the output end of the hydraulic column is rotatably connected to the L-shaped frame, and the rotation connection center of the hydraulic column and the L-shaped frame and the center of the circle where the arc frame is located are on the same vertical axis.

[0009] As a further solution of the present invention: a matching groove is provided on the arc frame, a slider is provided at the bottom of the L-shaped frame, the slider is slidably fitted with the matching groove, locking holes are respectively provided at both ends of the arc frame, and a locking cylinder is fixedly installed on the vertical frame, and when the vertical frame moves along the arc groove to the two ends of the arc frame, the locking cylinder is aligned with the locking hole.

[0010] As a further solution of the present invention: a sliding frame is inserted into the position of the side of the chassis corresponding to the telescopic column one, the end of the sliding frame is connected to the output end of the telescopic column one, a supporting flange is provided at the end of the sliding frame, a supporting cylinder is fixedly installed on the rotating motor, a supporting groove is provided on the upper side of the sliding frame, a mounting flange is provided at the position of the side of the frame corresponding to the sliding frame, a telescopic cylinder is provided in the mounting flange, the telescopic cylinder is connected to a supporting pulley, and the supporting pulley and the supporting groove cooperate with each other.

[0011] As a further solution of the present invention: the bottom of the sliding frame is arranged in an arc shape, and the length of the sliding frame is half of the length of the side guide rail.

[0012] As a further solution of the present invention: the flipping mechanism includes a connecting frame three arranged between the frames, the connecting frames three are arranged in pairs, and the mounting shafts are symmetrically arranged between the connecting frames three arranged in pairs, a rotating support frame is arranged at a position of the connecting frame three close to the frame, a rotating frame is arranged on the inner side of the connecting seat, and two-way hydraulic rods are arranged on both sides of the rotating support frame, the two-way hydraulic rods are telescopically and rotatably installed on the rotating frame, and a flipping cylinder is rotatably connected between the rotating frame and the mounting shaft.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The frame is movably installed through a connecting frame 1 between the driving mechanism and the chassis. When the vehicle needs to be unloaded, the extension support mechanism is combined to first extend the telescopic column 1, and the rotating motor drives the telescopic column 2 to rotate to a vertical state to form an extended support for the chassis. Then, the driving mechanism is combined to drive the frame to translate, thereby shifting the frame and the carriage on the upper side of the connecting seat to facilitate the side unloading of the goods inside the carriage, prevent the goods from falling into the gap between the wheels during unloading, and ensure the overall stability of the vehicle during unloading. After unloading is completed, the frame and the connecting seat are retracted to the upper side of the chassis through the driving mechanism, and the telescopic column 1 and telescopic column 2 are retracted at the same time. The telescopic column 2 returns to a horizontal state driven by the rotating motor and is retracted to the side of the chassis.

[0014] (2) The vertical frame is movably installed through the arc frame and the arc groove, and an arc rack is set on the arc frame. The driving motor drives the matching gear on the vertical frame to engage with the arc rack. When the frame needs to be translated from the upper side of the chassis, the driving motor first drives the matching gear to engage with the arc rack, so that the vertical frame moves along the arc groove to the end of the arc frame. When the hydraulic columns on both sides of the connecting frame are adjusted into place, the hydraulic columns are controlled to move, thereby driving the frame to translate along the side guide rails, completing the translation of the frame, the connecting seat and the top carriage, which is convenient for subsequent unloading operations.

[0015] (3) When the vehicle frame and the connecting seat are translated, the sliding frame is inserted into the side of the chassis, and the sliding frame moves synchronously with the telescopic column. When the telescopic column is extended, it will synchronously drive the sliding frame to extend outward. When the vehicle frame is translated under the drive mechanism, the telescopic cylinder and the support pulley arranged on the side of the vehicle frame cooperate with the support groove on the upper side of the sliding frame to ensure the overall stability of the vehicle frame during translation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the installation of the driving mechanism and the extension support mechanism in the present invention.

[0018] Figure 3 It is a schematic structural diagram of the extension support mechanism in the present invention.

[0019] Figure 4 It is a schematic diagram of the connection between the frame and the driving mechanism in the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the driving mechanism in the present invention.

[0021] Figure 6 It is a schematic diagram of the installation of the sliding frame in the present invention.

[0022] Figure 7 It is a schematic diagram of the cross-section structure of the sliding frame in the present invention.

[0023] Figure 8 It is a schematic diagram of the connection structure between the vehicle frame and the connecting seat in the present invention.

[0024] Fig. 9 It is a structural schematic diagram of the turning mechanism in the present invention.

[0025] In the figure: 1, chassis; 10, connecting frame 1; 11, side guide rail; 12, sliding frame; 13, support groove; 14, support flange; 15, support cylinder; 2, frame; 20, connecting frame 2; 21, L-shaped frame; 210, matching pulley; 211, slider; 22, mounting flange; 23, telescopic cylinder; 24, support pulley; 3, connecting seat; 4, extension support mechanism; 40, telescopic column 1; 41, rotating motor; 42, Telescopic column two; 43, support seat; 5, driving mechanism; 50, arc frame; 500, matching groove; 51, arc groove; 52, arc rack; 53, vertical frame; 54, driving motor; 55, matching gear; 56, hydraulic column; 57, locking cylinder; 58, locking hole; 6, flipping mechanism; 60, connecting frame three; 61, mounting shaft; 62, flipping cylinder; 63, rotating frame; 64, slewing support frame; 65, bidirectional hydraulic rod. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0027] like Figure 1 , Figure 2 , Figure 3 As shown, a frame structure of a dump trailer includes a chassis 1, a frame 2 is mounted on the chassis 1, a connecting seat 3 is movably mounted on the frame 2, a connecting frame 10 is evenly arranged in the horizontal direction at the center of the chassis 1, a driving mechanism 5 is arranged between the frame 2 and the connecting frame 10, the frame 2 is movably mounted between the chassis 1 through the driving mechanism 5, an extension support mechanism 4 is arranged on the side of the chassis 1, and a flip mechanism 6 is also arranged between the frame 2 and the connecting frame 10. The extension support mechanism 4 includes a telescopic column 1 40 arranged inside the connecting frame 10, the telescopic column 1 40 is symmetrically arranged on both sides of the chassis 1, the end of the telescopic column 1 40 is connected to a rotating motor 41, a telescopic column 2 42 is arranged on the rotating motor 41, the telescopic column 1 40 and the telescopic column 2 42 are arranged vertically, and a support seat 43 is arranged at the end of the telescopic column 2 42.

[0028] Specifically, the frame 2 is movably installed through the connecting frame 10 between the driving mechanism 5 and the chassis 1. When the vehicle needs to be unloaded, the extension support mechanism 4 is combined to first extend the telescopic column 1 40, and the rotating motor 41 drives the telescopic column 2 42 to rotate to a vertical state to form an extended support for the chassis 1. Then, the frame 2 is driven to translate in combination with the driving mechanism 5, so as to shift the frame 2 and the compartment on the upper side of the connecting seat 3, which is convenient for the side unloading of the goods inside the compartment, and prevents the goods from falling into the gap between the wheels during unloading, and at the same time, it can ensure the overall stability of the vehicle during unloading. After unloading is completed, the frame 2 and the connecting seat 3 are retracted as a whole to the upper side of the chassis 1 through the driving mechanism 5, and the telescopic column 1 40 and the telescopic column 2 42 are retracted at the same time. The telescopic column 2 42 returns to a horizontal state driven by the rotating motor 41 and is retracted to the side of the chassis 1.

[0029] Further, such as Figure 4 , Figure 5 As shown, a connecting frame 20 is provided at a position on the inner side of the frame 2 corresponding to the connecting frame 10, and L-shaped frames 21 are provided on both sides of the connecting frame 20. A matching pulley 210 is provided on the L-shaped frame 21. A side guide rail 11 is provided on the side of the connecting frame 10, and the L-shaped frame 21 is slidably installed between the matching pulley 210 and the side guide rail 11.

[0030] Specifically, the frame 2 is movably installed through the L-shaped frame 21 and the side guide rail 11 on the side of the connecting frame 10 in cooperation with the pulley 210. When the driving mechanism 5 is started, it will drive the frame 2 to shift along the side guide rail 11, and cooperate with the extension support mechanism 4 to realize the translation of the frame 2.

[0031] Further, such as Figure 5 As shown, the driving mechanism 5 includes an arc frame 50 arranged on both sides of the connecting frame 10, the arc frame 50 is fixedly connected to the connecting frame 10, an arc groove 51 is arranged in the arc frame 50, a vertical frame 53 is slidably installed in the arc groove 51, an arc rack 52 is arranged on the edge of the arc groove 51, a matching gear 55 is rotatably installed on the vertical frame 53, the matching gear 55 and the arc rack 52 are meshed with each other, and the matching gear 55 is connected to a driving motor 54, and a hydraulic column 56 is installed on the top of the vertical frame 53, the output end of the hydraulic column 56 is rotatably connected to the L-shaped frame 21, and the rotation connection center of the hydraulic column 56 and the L-shaped frame 21 is on the same vertical axis as the center of the circle where the arc frame 50 is located.

[0032] Specifically, the vertical frame 53 is movably installed through the arc frame 50 and the arc groove 51, and the arc rack 52 is set on the arc frame 50. The driving motor 54 drives the matching gear 55 on the vertical frame 53 to mesh with the arc rack 52. When the frame 2 needs to be translated from the upper side of the chassis 1, the driving motor 54 first drives the matching gear 55 to mesh with the arc rack 52, so that the vertical frame 53 moves along the arc groove 51 to the end of the arc frame 50. When the hydraulic columns 56 on both sides of the connecting frame 10 are adjusted to the right position, the hydraulic columns 56 are controlled to move, thereby driving the frame 2 to translate along the side guide rails 11, completing the translation of the frame 2, the connecting seat 3 and the top carriage, which is convenient for the subsequent unloading operation.

[0033] Further, such as Figure 5 As shown, a matching groove 500 is provided on the arc frame 50, a slider 211 is provided at the bottom of the L-shaped frame 21, and the slider 211 is slidably fitted with the matching groove 500. Locking holes 58 are respectively provided at both ends of the arc frame 50, and a locking cylinder 57 is fixedly installed on the vertical frame 53. When the vertical frame 53 moves along the arc groove 51 to the two ends of the arc frame 50, the locking cylinder 57 is aligned with the locking hole 58.

[0034] Specifically, in order to ensure the stable operation of the hydraulic column 56, when the vertical frame 53 moves to the specified position, the locking cylinder 57 cooperates with the locking hole 58 to lock the position of the vertical frame 53 and the arc frame 50 to ensure the stable translation of the frame 2.

[0035] Further, such as Figure 4 , Figure 6 As shown, a sliding frame 12 is inserted into the part of the side of the chassis 1 corresponding to the telescopic column 40, and the end of the sliding frame 12 is connected to the output end of the telescopic column 40. A supporting flange 14 is provided at the end of the sliding frame 12. A supporting cylinder 15 is fixedly installed on the rotating motor 41. A supporting groove 13 is provided on the upper side of the sliding frame 12. A mounting flange 22 is provided at the part of the side of the frame 2 corresponding to the sliding frame 12. A telescopic cylinder 23 is provided in the mounting flange 22. The telescopic cylinder 23 is connected to a supporting pulley 24, and the supporting pulley 24 and the supporting groove 13 cooperate with each other.

[0036] Specifically, when the frame 2 and the connecting seat 3 are translated, in order to ensure the stability of the frame 2, the sliding frame 12 is inserted into the side of the chassis 1, and the sliding frame 12 moves synchronously with the telescopic column 40. When the telescopic column 40 is extended, it will synchronously drive the sliding frame 12 to extend outward. When the frame 2 is translated under the drive of the driving mechanism 5, the telescopic cylinder 23 and the supporting pulley 24 arranged on the side of the frame 2 cooperate with the supporting groove 13 on the upper side of the sliding frame 12, thereby ensuring the overall stability of the frame 2 during translation.

[0037] Further, such as Figure 7 As shown, the bottom of the sliding frame 12 is arranged in an arc shape, and the length of the sliding frame 12 is half of the length of the side guide rail 11.

[0038] Further, such as Figure 8 , Fig. 9 As shown, the flipping mechanism 6 includes a connecting frame 3 60 arranged between the frames 2, the connecting frames 3 60 are arranged in pairs, and mounting shafts 61 are symmetrically arranged between the connecting frames 3 60 arranged in pairs, a rotating support frame 64 is arranged at a position of the connecting frame 3 60 close to the frame 2, a rotating frame 63 is arranged on the inner side of the connecting seat 3, and two-way hydraulic rods 65 are arranged on both sides of the rotating support frame 64, the two-way hydraulic rods 65 and the rotating frame 63 are telescopically and rotatably installed, and a flipping cylinder 62 is rotatably connected between the rotating frame 63 and the mounting shaft 61.

[0039] Specifically, a connecting frame 3 60 is provided on the inner side of the vehicle frame 2, and an installation shaft 61 and a slewing support frame 64 are provided through the connecting frame 3 60. When the vehicle frame 2 is translated into position under the drive of the driving mechanism 5, when it is necessary to control the connecting seat 3 and the top carriage to be flipped and unloaded, the two-way hydraulic rod 65 on one side can be opened, and then the flip cylinder 62 on that side can be controlled to make the connecting seat 3 rotate around the two-way hydraulic rod 65 on the other side, thereby performing the unloading operation; conversely, when it is necessary to perform the unloading operation to the other side, the above operation can be performed in the opposite direction.

[0040] The working principle of the embodiment of the present invention is: like Figure 1-Figure 9As shown, the frame 2 is movably installed through the connecting frame 10 between the driving mechanism 5 and the chassis 1. When the vehicle needs to be unloaded, the extension support mechanism 4 is combined to first extend the telescopic column 1 40, and the rotating motor 41 drives the telescopic column 2 42 to rotate to a vertical state to form an extended support for the chassis 1. Then, the driving mechanism 5 is combined to drive the frame 2 to translate, so as to shift the frame 2 and the compartment on the upper side of the connecting seat 3, which is convenient for the side unloading of the goods inside the compartment, preventing the goods from falling into the gap between the wheels during unloading, and at the same time ensuring the overall stability of the vehicle during unloading. After unloading is completed, the frame 2 and the connecting seat 3 are retracted as a whole to the upper side of the chassis 1 through the driving mechanism 5, and the telescopic column 1 40 and the telescopic column 2 42 are retracted at the same time. The telescopic column 2 42 returns to a horizontal state driven by the rotating motor 41 and is retracted to the side of the chassis 1. The frame 2 is movably mounted through the L-shaped frame 21 and the side guide rails 11 on the side of the connecting frame 10 by the matching pulley 210. When the driving mechanism 5 is started, the frame 2 will be driven to shift along the side guide rails 11, and the extended support mechanism 4 will be matched to realize the translation of the frame 2. The vertical frame 53 is movably mounted through the arc frame 50 and the arc groove 51, and the arc rack 52 is arranged on the arc frame 50. The matching gear 55 on the vertical frame 53 is driven by the driving motor 54 to mesh with the arc rack 52. When the frame 2 needs to be translated from the upper side of the chassis 1, the driving motor 54 is first used to drive the matching gear 55 to mesh with the arc rack 52, so that the vertical frame 53 moves along the arc groove 51 to the end of the arc frame 50. When the hydraulic columns 56 on both sides of the connecting frame 10 are adjusted to the right position, the hydraulic columns 56 are controlled to move, thereby driving the frame 2 to translate along the side guide rails 11, completing the translation of the frame 2, the connecting seat 3 and the top carriage, which is convenient for subsequent unloading operations. In order to ensure the stable operation of the hydraulic columns 56, when the vertical frame 53 moves to the specified position, the locking cylinder 57 cooperates with the locking hole 58 to lock the position of the vertical frame 53 relative to the arc frame 50, so as to ensure the stable translation of the frame 2. When the frame 2 and the connecting seat 3 are translated, in order to ensure the stability of the frame 2, the sliding frame 12 is inserted into the side of the chassis 1, and the sliding frame 12 moves synchronously with the telescopic column 40. When the telescopic column 40 is extended, it will synchronously drive the sliding frame 12 to extend outward. When the frame 2 is translated under the drive of the driving mechanism 5, the telescopic cylinder 23 and the supporting pulley 24 arranged on the side of the frame 2 cooperate with the supporting groove 13 on the upper side of the sliding frame 12, thereby ensuring the overall stability of the frame 2 during translation.A connecting frame 3 60 is arranged on the inner side of the vehicle frame 2, and an installation shaft 61 and a slewing support frame 64 are arranged through the connecting frame 3 60. When the vehicle frame 2 is translated into position under the drive of the driving mechanism 5, when it is necessary to control the connecting seat 3 and the top carriage to be flipped and unloaded, the two-way hydraulic rod 65 on one side can be opened, and then the flip cylinder 62 on that side can be controlled to make the connecting seat 3 rotate around the two-way hydraulic rod 65 on the other side, so as to perform the unloading operation; conversely, when it is necessary to perform the unloading operation to the other side, the above operation can be performed in the opposite direction.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Any reference numeral in a claim shall not be regarded as limiting the claim involved.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dump trailer frame structure, comprising a chassis (1), a frame (2) mounted on the chassis (1), a connecting seat (3) movably mounted on the frame (2), characterized in that: A connecting frame (10) is evenly arranged in the transverse direction at the center of the chassis (1); a driving mechanism (5) is provided between the vehicle frame (2) and the connecting frame (10); the vehicle frame (2) is movably mounted between the vehicle frame (2) and the chassis (1) via the driving mechanism (5); an extending support mechanism (4) is provided on the side of the chassis (1); and a turning mechanism (6) is also provided between the vehicle frame (2) and the connecting frame (10); The extension support mechanism (4) comprises a telescopic column (40) arranged inside a connecting frame (10), the telescopic column (40) being symmetrically arranged on both sides of the chassis (1), the ends of the telescopic column (40) being connected to a rotating motor (41), the rotating motor (41) being provided with a telescopic column (42), the telescopic column (40) being arranged vertically with the telescopic column (42), and the ends of the telescopic column (42) being provided with a support seat (43).

2. A dump trailer frame structure according to claim 1, characterized in that: A second connecting frame (20) is arranged at a position on the inner side of the vehicle frame (2) corresponding to the first connecting frame (10), L-shaped frames (21) are arranged on both sides of the second connecting frame (20), matching pulleys (210) are arranged on the L-shaped frames (21), and side guide rails (11) are arranged on the sides of the first connecting frame (10), and the L-shaped frames (21) are slidably installed between the matching pulleys (210) and the side guide rails (11).

3. A dump trailer frame structure according to claim 2, characterized in that: The driving mechanism (5) comprises an arc frame (50) arranged on both sides of the connecting frame (10), the arc frame (50) being fixedly connected to the connecting frame (10), an arc groove (51) being arranged in the arc frame (50), a vertical frame (53) being slidably mounted in the arc groove (51), an arc rack (52) being arranged at the edge of the arc groove (51), a matching gear (55) being rotatably mounted on the vertical frame (53), the matching gear (55) and the arc rack (52) being meshed with each other, the matching gear (55) being connected to a driving motor (54), a hydraulic column (56) being mounted on the top of the vertical frame (53), an output end of the hydraulic column (56) being rotatably connected to the L-shaped frame (21), and a rotational connection center between the hydraulic column (56) and the L-shaped frame (21) and a circle center of the arc frame (50) being located on the same vertical axis.

4. A dump trailer frame structure according to claim 3, characterized in that: The arc frame (50) is provided with a matching groove (500), the bottom of the L-shaped frame (21) is provided with a sliding block (211), the sliding block (211) and the matching groove (500) are slidably matched and installed, locking holes (58) are respectively provided at both ends of the arc frame (50), and a locking cylinder (57) is fixedly installed on the vertical frame (53), and when the vertical frame (53) moves along the arc groove (51) to the two ends of the arc frame (50), the locking cylinder (57) is aligned with the locking hole (58).

5. The frame structure of a dump trailer according to claim 1, characterized in that: A sliding frame (12) is inserted into a portion of the side of the chassis (1) corresponding to the telescopic column (40); an end of the sliding frame (12) is connected to an output end of the telescopic column (40); a supporting flange (14) is provided at the end of the sliding frame (12); a supporting cylinder (15) is fixedly mounted on the rotating motor (41); a supporting groove (13) is provided on the upper side of the sliding frame (12); a mounting flange (22) is provided at a portion of the side of the frame (2) corresponding to the sliding frame (12); a telescopic cylinder (23) is provided in the mounting flange (22); the telescopic cylinder (23) is connected to a supporting pulley (24); the supporting pulley (24) and the supporting groove (13) cooperate with each other.

6. A dump trailer frame structure according to claim 5, characterized in that: The bottom of the sliding frame (12) is arranged in an arc shape, and the length of the sliding frame (12) is half the length of the side guide rail (11).

7. The frame structure of a dump trailer according to claim 1, characterized in that: The flip mechanism (6) comprises a third connecting frame (60) arranged between the vehicle frames (2); the third connecting frames (60) are arranged in pairs; a mounting shaft (61) is symmetrically arranged between the third connecting frames (60) arranged in pairs; a slewing support frame (64) is arranged at a position of the third connecting frame (60) close to the vehicle frame (2); a rotating frame (63) is arranged on the inner side of the connecting seat (3); two-way hydraulic rods (65) are arranged on both sides of the slewing support frame (64); the two-way hydraulic rods (65) are telescopically and rotatably mounted on the rotating frame (63); and a flip cylinder (62) is rotatably connected between the rotating frame (63) and the mounting shaft (61).

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