Rear-turning type dump trailer carriage

Abstract

The utility model relates to the technical field of trailers, and provides a rear-turning type dump trailer carriage which is characterized in that a carriage body is placed above a chassis, and the rear end of the carriage body is hinged with the chassis; the lower positioning seat is used for being arranged on a chassis and located in front of a carriage body, a lower positioning hole is formed in the lower positioning seat, and the axis of the lower positioning hole is arranged in the left-right direction; the lower positioning shaft is rotationally arranged in the lower positioning hole; the upper positioning seat is arranged on the carriage body and located in front of the carriage body, an upper positioning hole is formed in the upper positioning seat, and the axis of the upper positioning hole is arranged in the left-right direction; the upper positioning shaft is rotationally arranged in the upper positioning hole; the lower end of the lifting mechanism is hinged to the lower positioning seat through a lower positioning shaft, and the upper end of the lifting mechanism is hinged to the upper positioning seat through an upper positioning shaft. By means of the technical scheme, the problem that in the prior art, a lifting mechanism is generally arranged between the bottom of a compartment and a vehicle frame, and maintenance is not convenient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of trailers, and in particular to a rear-tip dump trailer compartment. Background Art

[0002] During transportation, the trailer compartment provides a relatively enclosed and stable loading space for cargo, protecting it from environmental factors and ensuring its quality and integrity. The rear dump trailer compartment, with its rear doors and lifting mechanism, enables quick and convenient unloading of bulk cargo. Existing lifting mechanisms are typically located between the compartment floor and the frame, making maintenance inconvenient. Utility Model Content

[0003] The utility model provides a rear-dumping dump trailer compartment, which solves the problem in the related art that the lifting mechanism is generally arranged between the bottom of the compartment and the frame, which is very inconvenient to maintain.

[0004] The technical solution of the utility model is as follows: a rear dump trailer compartment is used to be arranged on the chassis of the trailer, and the key is: including:

[0005] A box body, the box body is used to be placed above the chassis, and the rear end of the box body is used to be hinged to the chassis;

[0006] A lower positioning seat, the lower positioning seat is used to be set on the chassis and is located in front of the compartment, the lower positioning seat has a lower positioning hole, and the axis of the lower positioning hole is set along the left-right direction;

[0007] a lower positioning shaft, the lower positioning shaft being rotatably disposed in the lower positioning hole, and the diameter of the lower positioning shaft being smaller than the aperture of the lower positioning hole;

[0008] An upper positioning seat, the upper positioning seat is arranged on the box body and is located in front of the box body, the upper positioning seat has an upper positioning hole, and the axis of the upper positioning hole is arranged along the left-right direction;

[0009] an upper positioning shaft, the upper positioning shaft being rotatably disposed in the upper positioning hole, and the diameter of the upper positioning shaft being smaller than the aperture of the upper positioning hole;

[0010] A lifting mechanism, wherein the lower end of the lifting mechanism is hinged to the lower positioning seat by means of the lower positioning shaft, and the upper end of the lifting mechanism is hinged to the upper positioning seat by means of the upper positioning shaft.

[0011] The upper positioning seat is located at the lower end of the compartment.

[0012] The lower positioning seat is detachably connected to the chassis, and the upper positioning seat is detachably connected to the compartment.

[0013] The lower positioning shaft and the lower positioning seat are detachably connected, and the lower positioning shaft and the lifting mechanism are detachably connected.

[0014] The upper positioning shaft and the upper positioning seat are detachably connected, and the upper positioning shaft and the lifting mechanism are detachably connected.

[0015] The rear end of the box body has a discharge port, and further includes:

[0016] A discharge door, the discharge door is used for sealing at the discharge port, and the lower end of the discharge door is hinged to the compartment;

[0017] A first positioning plate is provided at both left and right ends of the inner side of the discharge door;

[0018] A hanging rod, the hanging rod being arranged on the inner side of the first positioning plate, and the axis of the hanging rod being arranged along the left-right direction;

[0019] A support rod is provided inside the compartment and in front of the hanging rod, and the axis of the support rod is provided in the left-right direction;

[0020] A pressing plate, the front end of which is slidably arranged on the support rod, and the rear end of which is used to be sleeved on the hanging rod;

[0021] An anti-slip part is detachably connected to the hanging rod, and the rear end of the pressing plate is used to be clamped between the anti-slip part and the first positioning plate.

[0022] It also includes a second positioning plate, which is arranged on the inner side of the body, the second positioning plate is located on the outer side of the pressure plate, and is located in front of the first positioning plate. One end of the support rod is used to be threadedly connected to the second positioning plate and the body, and the other end of the support rod has an anti-slip ring. The front end of the pressure plate is used to be clamped between the anti-slip ring and the second positioning plate.

[0023] The anti-slip component is threadedly connected to the hanging rod.

[0024] Also includes,

[0025] Positioning rods are provided on both the left and right sides of the discharge door, and the axial direction of the positioning rods is arranged along the left and right directions;

[0026] A hook, wherein the front end of the hook is arranged on the outside of the compartment and is hinged to the compartment, and the rear end of the hook is rotated downward to be hooked and connected with the positioning rod.

[0027] At least two positioning rods are provided on both the left and right sides of the discharge door, and all the positioning rods on the same side are arranged in an up-down direction, and the hooks are provided in a one-to-one correspondence with the positioning rods.

[0028] The working principle and beneficial effects of the utility model are as follows: the car body is used to be placed above the chassis, and the rear end of the car body is used to be hinged to the chassis; the lower positioning seat is used to be arranged on the chassis and is located in front of the car body, and the lower positioning seat has a lower positioning hole, and the axis of the lower positioning hole is arranged along the left and right directions; the lower positioning shaft is rotatably arranged in the lower positioning hole, and the diameter of the lower positioning shaft is smaller than the aperture of the lower positioning hole; the upper positioning seat is arranged on the car body and is located in front of the car body, and the upper positioning seat has an upper positioning hole, and the axis of the upper positioning hole is arranged along the left and right directions; the upper positioning shaft is rotatably arranged in the upper positioning hole, and the diameter of the upper positioning shaft is smaller than the aperture of the upper positioning hole; the lower end of the lifting mechanism is hinged to the lower positioning seat by means of the lower positioning shaft, and the upper end of the lifting mechanism is hinged to the upper positioning seat by means of the upper positioning shaft.

[0029] The lower positioning shaft cooperates with the lower positioning seat to provide a support and positioning point for the lower end of the lifting mechanism, and the upper positioning shaft cooperates with the upper positioning seat to provide a support and positioning point for the upper end of the lifting mechanism. The box is placed above the chassis, and the rear end is hinged to the chassis. During the extension and retraction of the lifting mechanism, the front end of the box can be flipped to achieve rapid dumping of goods. The lower positioning hole cooperates with the upper positioning hole to make the lifting mechanism more flexible during the extension and retraction process, ensuring that the box can be flipped smoothly. The lower positioning shaft, lower positioning seat, upper positioning shaft, upper positioning seat and lifting mechanism of the utility model are all arranged in front of the box, so that the connection points of the lifting mechanism and the chassis, and the connection points of the lifting mechanism and the box are all located in front of the box. Maintenance personnel can more easily approach these connection points for inspection and maintenance, which can improve the convenience of maintenance and reduce maintenance time and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0031] Figure 1 It is a schematic diagram of the structure of the utility model when it is folded.

[0032] Figure 2 It is a structural schematic diagram of the utility model when being lifted.

[0033] Figure 3 This is a schematic diagram of the connection structure between the lower positioning seat, the lifting mechanism and the chassis in the utility model.

[0034] Figure 4 for Figure 2 A magnified view of center.

[0035] Figure 5 This is a top view of the connection between the hanging rod, the unloading door and the compartment body in the utility model.

[0036] Figure 6 This is the main view of the connection between the hanging rod, the unloading door and the compartment body in the utility model.

[0037] Figure 7 This is a front view of the connection between the hook, the positioning rod and the box body in the utility model.

[0038] In the figure: 1. Box body, 2. Lower positioning seat, 3. Lower positioning shaft, 4. Upper positioning seat, 5. Upper positioning shaft, 6. Lifting mechanism, 7. Lower positioning hole, 8. Upper positioning hole, 9. Unloading door, 10. First positioning plate, 11. Hanging rod, 12. Support rod, 13. Pressing plate, 14. Anti-slip part, 15. Second positioning plate, 16. Anti-slip convex ring, 17. Positioning rod, 18. Hook, 19. Chassis. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0040] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0041] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0042] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0043] Example, see Figures 1 to 4, is an embodiment of the present utility model, which proposes a rear-tip dump trailer compartment, which is used to be set on the chassis 19 of the trailer, including a compartment 1, a lower positioning seat 2, a lower positioning shaft 3, an upper positioning seat 4, an upper positioning shaft 5, and a lifting mechanism 6. The compartment 1 is used to be placed above the chassis 19, and the rear end of the compartment 1 is used to be hinged to the chassis; the lower positioning seat 2 is used to be set on the chassis 19 and is located in front of the compartment 1. The lower positioning seat 2 has a lower positioning hole 7, and the axis of the lower positioning hole 7 is set along the left and right direction; the lower positioning shaft 3 is rotatably arranged in the lower positioning hole 7, and the diameter of the lower positioning shaft 3 is smaller than the aperture of the lower positioning hole 7; the upper positioning seat 4 is arranged on the car body 1 and is located in front of the car body 1. The upper positioning seat 4 has an upper positioning hole 8, and the axis of the upper positioning hole 8 is arranged in the left and right direction; the upper positioning shaft 5 is rotatably arranged in the upper positioning hole 8, and the diameter of the upper positioning shaft 5 is smaller than the aperture of the upper positioning hole 8; the lower end of the lifting mechanism 6 is hinged to the lower positioning seat 2 by means of the lower positioning shaft 3, and the upper end of the lifting mechanism 6 is hinged to the upper positioning seat 4 by means of the upper positioning shaft 5.

[0044] In this embodiment, the upper end surface of the lower positioning seat 2 has a lower receiving groove, and the lower positioning holes 7 located on the left and right sides of the lower receiving groove are both connected to the lower receiving groove. The lower positioning shaft 3 is located in the lower receiving groove, and the left and right ends are respectively inserted into the lower positioning holes 7 at the corresponding ends. The lower end of the lifting mechanism 6 is located in the lower receiving groove, which can prevent the lower end of the lifting mechanism 6 from rocking left and right. The front side surface of the upper positioning seat 4 has an upper receiving groove, and the upper positioning holes 8 located on the left and right sides of the upper receiving groove are both connected to the upper receiving groove. The upper positioning shaft 5 is located in the upper receiving groove, and the left and right ends are respectively inserted into the upper positioning holes 8 at the corresponding ends. The upper end of the lifting mechanism 6 is located in the upper receiving groove, which can prevent the upper end of the lifting mechanism 6 from rocking left and right. This improves the stability of the lifting mechanism 6 during the extension and retraction process.

[0045] The lower positioning shaft 3 cooperates with the lower positioning seat 2 to provide a support positioning point for the lower end of the lifting mechanism 6, and the upper positioning shaft 5 cooperates with the upper positioning seat 4 to provide a support positioning point for the upper end of the lifting mechanism 6. The car body 1 is placed above the chassis 19, and the rear end is hinged to the chassis 19. During the extension and retraction process of the lifting mechanism 6, the front end of the car body 1 can be flipped to achieve rapid dumping of goods. The lower positioning hole 7 and the upper positioning hole 8 cooperate to make the lifting mechanism 6 more flexible during the extension and retraction process, ensuring that the car body 1 can be smoothly flipped. The lower positioning shaft 3, the lower positioning seat 2, the upper positioning shaft 5, the upper positioning seat 4 and the lifting mechanism 6 of the utility model are all arranged in front of the car body 1, so that the connection points of the lifting mechanism 6 and the chassis 19, and the connection points of the lifting mechanism 6 and the car body 1 are all located in front of the car body 1. Maintenance personnel can more easily approach these connection points for inspection and maintenance, which can improve the convenience of maintenance and reduce maintenance time and maintenance costs.

[0046] Further, such as Figure 1 and Figure 2As shown, the upper positioning seat 4 is located at the lower end of the car body 1. Reasonable use of space makes the connection structure more compact, which helps to improve the stability and reliability of the overall structure.

[0047] Furthermore, the lower positioning seat 2 is detachably connected to the chassis 19, and the upper positioning seat 4 is detachably connected to the vehicle body 1. For example, the detachable connection is achieved by using bolts and nuts, which facilitates maintenance, replacement, or position adjustment of the lower positioning seat 2 and the upper positioning seat 4, thereby improving the maintainability and flexibility of the equipment.

[0048] Furthermore, the lower positioning shaft 3 is detachably connected to the lower positioning seat 2, and the lower positioning shaft 3 is detachably connected to the lifting mechanism 6. In the event of a malfunction or maintenance, the lower positioning shaft 3 can be removed for repair or replacement without replacing the entire structure, reducing maintenance costs. This also facilitates replacement of lower positioning shafts 3 of varying specifications for different situations, improving the versatility of the device.

[0049] Furthermore, the upper positioning shaft 5 is detachably connected to the upper positioning seat 4, and the upper positioning shaft 5 is detachably connected to the lifting mechanism 6. In the event of a malfunction or when maintenance is required, the upper positioning shaft 5 can be individually disassembled for repair or replacement without having to replace the entire structure, thereby reducing maintenance costs. At the same time, it is also convenient to replace upper positioning shafts 5 of different specifications in different situations, thereby improving the versatility of the equipment. When the lower positioning shaft 3 is detachably connected to the lower positioning seat 2, and between the lower positioning shaft 3 and the lifting mechanism 6, the lifting mechanism 6 can also be individually disassembled for repair or replacement, further reducing maintenance costs.

[0050] Further, such as Figure 2 、 Figure 5 and Figure 6 As shown, the rear end of the compartment 1 has a discharge port, and also includes a discharge door 9, a first positioning plate 10, a hanging rod 11, a support rod 12, a pressure plate 13, and an anti-slip part 14. The discharge door 9 is used to be sealed at the discharge port, and the lower end of the discharge door 9 is hinged to the compartment 1; a first positioning plate 10 is provided at both left and right ends on the inner side of the discharge door 9; the hanging rod 11 is provided on the inner side of the first positioning plate 10, and the axis of the hanging rod 11 is provided along the left and right directions; the support rod 12 is provided on the inner side of the compartment 1 and is located in front of the hanging rod 11, and the axis of the support rod 12 is provided along the left and right directions; the front end of the pressure plate 13 is slidably provided on the support rod 12, and the rear end of the pressure plate 13 is used to be fitted on the hanging rod 11; the anti-slip part 14 and the hanging rod 11 are detachably connected, and the rear end of the pressure plate 13 is used to be clamped between the anti-slip part 14 and the first positioning plate 10.

[0051] Two first positioning plates 10 are provided on the inner side of the discharge door 9. The first positioning plate 10 on the left side has a hanging rod 11 on the right side, and the first positioning plate 10 on the right side has a hanging rod 11 on the left side. When the discharge door 9 does not need to be opened, the discharge door 9 is sealed at the discharge port at the rear end of the compartment 1. At this time, the rear end of the pressure plate 13 is sleeved on the hanging rod 11 and clamped between the anti-slip part 14 and the first positioning plate 10, thereby sealing and locking the discharge door 9 on the compartment 1. Figure 5 and Figure 6 As shown. When the discharge door 9 needs to be opened, the anti-slip part 14 is separated from the hanging rod 11, and the pressure plate 13 is slid so that the rear end of the pressure plate 13 is separated from the hanging rod 11, and then the upper end of the discharge door 9 is flipped backwards. When the discharge door 9 needs to be sealed and locked with the compartment 1 again, the discharge door 9 is first flipped back so that the discharge door 9 fits with the compartment 1, and the first positioning plate 10 fits with the inner wall of the compartment 1, and then the pressure plate 13 is slid so that the rear end of the pressure plate 13 is fitted onto the hanging rod 11, and then the anti-slip part 14 is locked with the hanging rod 11, so that the pressure plate 13 is clamped between the anti-slip part 14 and the first positioning plate 10. The structure is simple, the connection is firm and reliable, and the disassembly and assembly are convenient and quick, saving time and effort.

[0052] Further, such as Figure 5 and Figure 6 As shown, it also includes a second positioning plate 15, which is arranged on the inner side of the compartment 1, the second positioning plate 15 is located outside the pressure plate 13, and is located in front of the first positioning plate 10. One end of the support rod 12 is used to be threadedly connected to the second positioning plate 15 and the compartment 1, and the other end of the support rod 12 has an anti-slip convex ring 16. The front end of the pressure plate 13 is used to be clamped between the anti-slip convex ring 16 and the second positioning plate 15. The second positioning plate 15 can support the front end of the pressure plate 13. When it is not necessary to open the discharge door 9, the support rod 12 can be rotated so that the anti-slip convex ring 16 contacts the pressure plate 13, and the front end of the pressure plate 13 can be clamped between the anti-slip convex ring 16 and the second positioning plate 15, which has better stability and can prevent a longer part of the support rod 12 from being exposed inside the pressure plate 13 and easily damaged by bumps. When the discharge door 9 needs to be opened, the support rod 12 is first rotated in the opposite direction to move the anti-dropping convex ring 16 away from the pressing plate 13, thereby providing the pressing plate 13 with a sufficient sliding space to ensure that the rear end of the pressing plate 13 can be smoothly separated from the hanging rod 11. The structure is simple and the operation is convenient.

[0053] Furthermore, the anti-slip member 14 is threadedly connected to the hanging rod 11, and the connection is firm, which is convenient for installation and disassembly.

[0054] Further, such as Figure 2 and Figure 7As shown, it also includes a positioning rod 17 and a hook 18. The positioning rod 17 is provided on both the left and right sides of the discharge door 9, and the axial direction of the positioning rod 17 is provided in the left and right direction. The front end of the hook 18 is provided on the outside of the compartment 1 and is hinged to the compartment 1. After the rear end of the hook 18 is rotated downward, it is used to hook and connect with the positioning rod 17. When the rear end of the hook 18 is hooked with the positioning rod 17, it can play a positioning and locking role for the discharge door 9, making the connection between the discharge door 9 and the compartment 1 more firm and reliable. After the rear end of the hook 18 is flipped upward, the hook 18 can be separated from the positioning rod 17, making disassembly and assembly convenient and quick, saving time and effort.

[0055] Further, such as Figure 2 and Figure 7 As shown, at least two positioning rods 17 are installed on both the left and right sides of the discharge door 9. All positioning rods 17 on the same side are arranged in a vertical direction, and hooks 18 are provided in a one-to-one correspondence with the positioning rods 17. Multiple hooks 18 and positioning rods 17 are hooked together in a one-to-one correspondence, simultaneously locking the discharge door 9 to the compartment 1, making the connection between the discharge door 9 and the compartment 1 more secure and reliable. The positioning rods 17 are threadedly connected to the discharge door 9, facilitating assembly and disassembly for maintenance.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A rear dump trailer compartment, for being arranged on a chassis (19) of a trailer, characterized in that: include, A body (1), the body (1) being used to be placed above the chassis (19), and the rear end of the body (1) being used to be hinged to the chassis; A lower positioning seat (2), the lower positioning seat (2) is used to be arranged on the chassis (19) and is located in front of the compartment (1), the lower positioning seat (2) has a lower positioning hole (7), and the axis of the lower positioning hole (7) is arranged in the left-right direction; A lower positioning shaft (3), the lower positioning shaft (3) being rotatably disposed in the lower positioning hole (7), and the diameter of the lower positioning shaft (3) being smaller than the aperture of the lower positioning hole (7); An upper positioning seat (4), the upper positioning seat (4) being arranged on the compartment (1) and located in front of the compartment (1), the upper positioning seat (4) having an upper positioning hole (8), and the axis of the upper positioning hole (8) being arranged along the left-right direction; An upper positioning shaft (5), the upper positioning shaft (5) being rotatably disposed in the upper positioning hole (8), and the diameter of the upper positioning shaft (5) being smaller than the aperture of the upper positioning hole (8); A lifting mechanism (6), wherein the lower end of the lifting mechanism (6) is hinged to the lower positioning seat (2) by means of the lower positioning shaft (3), and the upper end of the lifting mechanism (6) is hinged to the upper positioning seat (4) by means of the upper positioning shaft (5).

2. The rear dump trailer compartment according to claim 1, characterized in that: The upper positioning seat (4) is located at the lower end of the compartment (1).

3. The rear dump trailer compartment according to claim 1, characterized in that: The lower positioning seat (2) and the chassis (19) are detachably connected, and the upper positioning seat (4) and the compartment (1) are detachably connected.

4. The rear dump trailer compartment according to claim 1, characterized in that: The lower positioning shaft (3) and the lower positioning seat (2) are detachably connected, and the lower positioning shaft (3) and the lifting mechanism (6) are detachably connected.

5. The rear dump trailer compartment according to claim 1, characterized in that: The upper positioning shaft (5) and the upper positioning seat (4) are detachably connected, and the upper positioning shaft (5) and the lifting mechanism (6) are detachably connected.

6. The rear dump trailer compartment according to claim 1, characterized in that: The rear end of the box body (1) has a discharge port and also includes: A discharge door (9), the discharge door (9) is used for sealingly being arranged at the discharge port, and the lower end of the discharge door (9) is hinged to the compartment (1); A first positioning plate (10), the first positioning plate (10) being provided at both left and right ends of the inner side of the discharge door (9); A hanging rod (11), the hanging rod (11) is arranged on the inner side of the first positioning plate (10), and the axis of the hanging rod (11) is arranged along the left-right direction; A support rod (12), the support rod (12) being arranged inside the compartment (1) and located in front of the hanging rod (11), and the axis of the support rod (12) being arranged in the left-right direction; A pressing plate (13), wherein the front end of the pressing plate (13) is slidably arranged on the support rod (12), and the rear end of the pressing plate (13) is used to be sleeved on the hanging rod (11); An anti-slip member (14) is detachably connected to the hanging rod (11), and a rear end of the pressing plate (13) is used to be clamped between the anti-slip member (14) and the first positioning plate (10).

7. The rear dump trailer compartment according to claim 6, characterized in that: The invention also includes a second positioning plate (15), the second positioning plate (15) being arranged on the inner side of the compartment (1), the second positioning plate (15) being located on the outer side of the pressure plate (13) and in front of the first positioning plate (10), one end of the support rod (12) being used for being threadedly connected with the second positioning plate (15) and the compartment (1), the other end of the support rod (12) being provided with an anti-slip convex ring (16), and the front end of the pressure plate (13) being used for being clamped between the anti-slip convex ring (16) and the second positioning plate (15).

8. The rear dump trailer compartment according to claim 6, characterized in that: The anti-slip component (14) is threadedly connected to the hanging rod (11).

9. The rear dump trailer compartment according to claim 6, characterized in that: Also includes, Positioning rods (17), the positioning rods (17) are provided on both the left and right sides of the discharge door (9), and the axial direction of the positioning rods (17) is provided along the left and right directions; A hook (18), wherein the front end of the hook (18) is arranged outside the compartment (1) and is hinged to the compartment (1); and the rear end of the hook (18) is rotated downward to be hooked and connected to the positioning rod (17).

10. The rear dump trailer compartment according to claim 9, characterized in that: At least two positioning rods (17) are provided on both the left and right sides of the discharge door (9), and all the positioning rods (17) on the same side are arranged in an up-down direction, and the hooks (18) are provided in one-to-one correspondence with the positioning rods (17).

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