Rotary support of pull type dumper

Abstract

The utility model discloses a rotary support of a pull type dump truck, which belongs to the technical field of dump trucks and comprises a bottom support assembly, a top support assembly is arranged on the inner side of the bottom support assembly, and a rotary shaft penetrates through the bottom support assembly and the top support assembly to connect the bottom support assembly and the top support assembly. A buffer block is arranged on the rear portion of the top supporting assembly. The rotating shaft is sleeved with a round pipe, a gap is formed between the inner wall face of the round pipe and the outer wall face of the rotating shaft, and an oil channel is formed in one side of the rotating shaft and communicated with the gap between the round pipe and the rotating shaft. The rotating shaft is sleeved with an oil seal, and one end face of the oil seal is tightly attached to the side portion of the round pipe. A plug is arranged at one end of the rotating shaft, and a limiting ring is arranged at the other end of the rotating shaft. The bearing performance, the abrasion resistance, the impact resistance and the operation stability of the support can be improved, the fault shutdown condition is reduced, the service life is prolonged, the maintenance cost is reduced, and meanwhile shaking of the frame of the pull type dumper is restrained.

Description

Technical Field

[0001] This utility model belongs to the field of dump truck technology, specifically relating to a towable dump truck rotating support. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Trailer-mounted dump trucks, as core cargo transportation and unloading equipment in engineering, mining, and construction fields, achieve tilting unloading of the trailer through their built-in tipping mechanism, significantly improving cargo transfer efficiency and reducing the labor intensity of manual unloading. The tipping bracket, as a key load-bearing and transmission component of the trailer-mounted dump truck's tipping mechanism, directly determines the trailer's unloading stability, load-bearing capacity, and applicability; its structural design has a decisive impact on the overall vehicle's operational performance. With the rapid development of the logistics and construction industries, the market has placed higher demands on the operational efficiency, adaptability, and operational safety of dump trailers, driving continuous iteration of tipping bracket technology. However, existing technologies still have many shortcomings that urgently need to be addressed.

[0004] Insufficient lubrication and protection of the shaft: Although the existing base is equipped with grease fittings for lubrication, the lubrication path is simple and lacks a sealing structure. In engineering scenarios, dust and dirt can easily enter the mating surfaces of the shaft and bearing, which not only contaminates the lubricating oil and aggravates wear, but also easily causes the grease fittings to become clogged, resulting in the failure of the lubrication function. At the same time, the existing base requires disassembly of components for maintenance, which is a cumbersome and time-consuming process.

[0005] Accelerated component wear: Due to lubrication failure, dust intrusion, and impact loads, the wear rate of the shaft and surrounding mating parts is accelerated, which not only shortens the service life but also exacerbates the increase in the gap of the support structure, further reducing operational stability.

[0006] Impact resistance and positioning deviation: When under heavy load, the bracket needs to withstand instantaneous impact force during overturning or emergency braking. Existing structures are prone to fatigue damage to components. Furthermore, long-term operation can lead to axial movement, affecting the stability and coaxiality of the carriage during overturning.

[0007] Base structure defects: Most existing bases adopt a split welded base, which is prone to stress concentration at the welded parts. When the carriage is overturned, the load distribution is uneven, resulting in local overload of the base. After long-term use, the welded parts are prone to cracking, deformation and other problems, resulting in insufficient structural strength and stability. Utility Model Content

[0008] To address the aforementioned problems, this utility model provides a rotating support for trailer-mounted dump trucks, which can improve the support's load-bearing capacity, wear resistance, impact resistance, and operational stability, reduce downtime due to malfunctions, extend service life, reduce maintenance costs, and simultaneously suppress the swaying of the trailer-mounted dump truck frame.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A towable dump truck rotating support includes a bottom support assembly, a top support assembly is provided inside the bottom support assembly, and a rotating shaft passes through the bottom support assembly and the top support assembly to connect the two; a buffer block is provided at the rear of the top support assembly;

[0011] A circular tube is fitted onto the rotating shaft, with a gap between the inner wall of the circular tube and the outer wall of the rotating shaft. An oil passage is provided on one side of the rotating shaft, and the oil passage is connected to the gap between the circular tube and the rotating shaft. An oil seal is fitted onto the rotating shaft, with one end of the oil seal in close contact with the side of the circular tube. A plug is provided at one end of the rotating shaft, and a limiting ring is provided at the other end of the rotating shaft.

[0012] As a further technical solution, the bottom support assembly includes a base plate, and side plates are provided at both ends of the base plate, which are fixedly connected to the base plate; a plurality of first reinforcing ribs and second reinforcing ribs are provided at intervals on the upper surface of the base plate, and the first reinforcing ribs and second reinforcing ribs are arranged alternately.

[0013] As a further technical solution, a first reinforcing seat is provided on the side of the side plate, and a second reinforcing seat is provided on the front of the side plate. One end of the first reinforcing seat and the second reinforcing seat are fixedly connected to the side plate, and the other end is fixedly connected to the bottom plate. The bottom plate, the side plate and the reinforcing rib are an integrated structure.

[0014] As a further technical solution, a mounting component is provided on the side of the side plate of the bottom support assembly. The upper end of the mounting component is connected to the rotating shaft, and the lower end of the mounting component is connected to the side plate by bolts.

[0015] As a further technical solution, the top support assembly includes a first support plate, second support plates are provided at both ends of the first support plate, and a third support plate is provided at the rear of the first support plate. The first support plate, the second support plate, and the third support plate are an integrated structure.

[0016] As a further technical solution, the buffer block is symmetrically arranged at the rear of the third support plate of the top support assembly, with one end face of the buffer block in close contact with the surface of the third support plate; the lower end of the buffer block is connected to the bottom plate of the bottom support assembly.

[0017] As a further technical solution, the oil passage includes a first oil passage and a second oil passage. One end of the first oil passage is an oil injection hole. One end of the first oil passage is blocked by a plug. The other end of the first oil passage is connected to one end of the second oil passage, and the other end of the second oil passage is connected to a gap.

[0018] As a further technical solution, the first oil passage is perpendicular to the second oil passage, the first oil passage is in the same axial direction as the rotating shaft, and the second oil passage is perpendicular to the axial direction of the rotating shaft.

[0019] As a further technical solution, the outer wall of the circular tube is connected to the second support plate of the top support assembly, and oil seals are provided on both sides of the circular tube, with the side of the oil seals closely attached to the side plate of the bottom support assembly.

[0020] As a further technical solution, a mounting groove is provided on the surface of one end of the rotating shaft, and the limiting ring is disposed in the mounting groove. The limiting ring is detachably connected to the rotating shaft; the side of the limiting ring is in close contact with the side plate of the bottom support assembly.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are:

[0022] 1. This utility model provides a first oil passage and a second oil passage perpendicular to each other on one side of the rotating shaft. One end of the first oil passage is connected to the outside, and the other end is connected to the second oil passage. The second oil passage leads to the gap between the rotating shaft and the round tube. Lubricating oil can be injected through the first oil passage without disassembling the parts. The lubricating oil is evenly distributed on the mating surface of the rotating shaft and the round tube through the second oil passage, simplifying the maintenance process. At the same time, the plug at one end of the rotating shaft seals the port of the first oil passage, and the oil seals on both sides of the round tube are tightly attached to the side plate of the bottom support assembly and the side of the round tube, forming a double sealing structure. This not only prevents lubricating oil leakage, but also prevents dust and mud from entering the mating surface, avoiding grease nipple blockage and lubrication failure.

[0023] 2. The buffer blocks symmetrically arranged at the rear of the third support plate of the top support assembly of this utility model have one end tightly attached to the third support plate and the lower end connected to the bottom plate of the bottom support assembly. They can absorb the impact load during heavy-load overturning and emergency braking, reduce rigid collisions between components, slow down the wear of the rotating shaft and surrounding mating components, prevent the gaps in the support structure from widening, and maintain operational stability. The buffer blocks absorb instantaneous impact force through their own elastic deformation, alleviate the impact load on the components, and reduce structural fatigue damage.

[0024] 3. One end of the rotating shaft of this utility model is fixed to the side plate of the bottom support assembly by the mounting parts and bolts. The other end has a detachable limiting ring in the mounting groove. The side of the limiting ring is in close contact with the side plate. At the same time, it works with the oil seals on both sides of the round tube to form a limiting constraint on the rotating shaft from both ends, accurately restricting the axial movement of the rotating shaft, ensuring the coaxiality of the rotating shaft during the flipping process, avoiding the flipping jamming, and improving the stability of operation.

[0025] 4. The integrated bottom support assembly and top support assembly of this utility model improve the overall load-bearing capacity, and the buffer block effectively suppresses the shaking of the frame during operation, reduces safety risks and equipment wear and tear, and ensures work efficiency. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0027] Figure 1 This is a structural diagram of the rotating support for a trailer-mounted dump truck according to this utility model;

[0028] Figure 2 This is a cross-sectional view of the towable dump truck rotating support of this utility model;

[0029] Figure 3 This is a schematic diagram of the installation position of the rotating bracket for the trailer-mounted dump truck of this utility model;

[0030] Figure 4 This is a schematic diagram of the usage status of the towable dump truck rotating support of this utility model;

[0031] In the diagram: 1. Top support assembly; 11. First support plate; 12. Second support plate; 13. Third support plate; 2. Bottom support assembly; 21. First reinforcing rib; 22. Second reinforcing rib; 23. First reinforcing seat; 24. Second reinforcing seat; 25. Base plate; 26. Side plate; 3. Bolt; 4. Plug; 5. Mounting component; 6. Buffer block; 7. Oil seal; 8. Round tube; 9. Rotating shaft; 10. Limiting ring; 14. First oil passage; 15. Second oil passage; 16. Mounting groove. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a towable dump truck rotating support, such as... Figure 1 and Figure 2 As shown, it includes a bottom support assembly 2, a top support assembly 1 is provided inside the bottom support assembly 2, and a rotating shaft 9 passes through the bottom support assembly 2 and the top support assembly 1 to connect the two; a buffer block 6 is provided at the rear of the top support assembly 1;

[0034] A circular tube 8 is fitted onto the rotating shaft 9. There is a gap between the inner wall of the circular tube 8 and the outer wall of the rotating shaft 9. An oil passage is provided on one side of the rotating shaft 9, and the oil passage is connected to the gap between the circular tube 8 and the rotating shaft 9. An oil seal 7 is fitted onto the rotating shaft 9. One end of the oil seal 7 is in close contact with the side of the circular tube 8. A plug 4 is provided at one end of the rotating shaft 9, and a limiting ring 10 is provided at the other end of the rotating shaft 9.

[0035] Specifically, a first oil passage 14 and a second oil passage 15 perpendicular to each other are provided on one side of the rotating shaft 9. One end of the first oil passage 14 is connected to the outside, and the other end is connected to the second oil passage 15. The second oil passage 15 leads to the gap between the rotating shaft 9 and the round tube 8. Lubricating oil can be injected through the first oil passage 14 without disassembling the parts. The lubricating oil is evenly distributed on the mating surface of the rotating shaft 9 and the round tube 8 through the second oil passage 15, simplifying the maintenance process. At the same time, the plug 4 at one end of the rotating shaft 9 seals the port of the first oil passage 14, and the oil seals 7 on both sides of the round tube 8 are tightly attached to the side plate 26 of the bottom support assembly 2 and the side of the round tube 8, forming a double sealing structure. This not only prevents lubricating oil leakage, but also prevents dust and mud from entering the mating surface, avoiding grease nipple blockage and lubrication failure.

[0036] The buffer blocks 6, symmetrically arranged at the rear of the third support plate 13 of the top support assembly 1, have one end tightly attached to the third support plate 13 and the lower end connected to the base plate 25 of the bottom support assembly 2. They can absorb the impact load during heavy-load overturning and emergency braking, reduce rigid collisions between components, slow down the wear of the rotating shaft 9 and surrounding mating components, prevent the gaps in the support structure from widening, and maintain operational stability. The buffer blocks 6 absorb instantaneous impact force through their own elastic deformation, alleviate the impact load on the components, and reduce structural fatigue damage.

[0037] The bottom support assembly 2 includes a base plate 25, with side plates 26 at both ends of the base plate 25, which are fixedly connected to the base plate 25. A plurality of first reinforcing ribs 21 and second reinforcing ribs 22 are spaced apart on the upper surface of the base plate 25, and these ribs are staggered. A first reinforcing seat 23 is provided on the side of the side plate 26, and a second reinforcing seat 24 is provided on the front of the side plate 26. One end of each of the first reinforcing seat 23 and the second reinforcing seat 24 is fixedly connected to the side plate 26, and the other end is fixedly connected to the base plate 25. The base plate 25, side plates 26, and reinforcing ribs are an integrated structure.

[0038] Specifically, the bottom support assembly 2 is formed using an integrated die-casting process, and its dimensions are adapted to the rear mounting area of ​​the trailer chassis frame. The two ends of the bottom plate 25 extend vertically upward to form side plates 26. The side plates 26 and the bottom plate 25 are integral die-cast structures without welding seams, ensuring connection strength.

[0039] On the upper surface of the base plate 25, a plurality of first reinforcing ribs 21 and second reinforcing ribs 22 are arranged at intervals along the length and width directions, and are staggered and perpendicularly distributed to form a grid-like reinforcing structure to enhance the bending resistance of the base plate 25. A first reinforcing seat 23 is welded and fixed to the outer side of the side plate 26. The first reinforcing seat 23 has a triangular plate-like structure. A second reinforcing seat 24 is welded and fixed to the front of the side plate 26. The second reinforcing seat 24 also has a triangular plate-like structure. The connection stability between the side plate 26 and the base plate 25 is further reinforced by the first reinforcing seat 23 and the second reinforcing seat 24, forming an integrated and stable support structure of the base plate 25, the side plate 26, the first reinforcing ribs 21, the second reinforcing ribs 22, the first reinforcing seat 23, and the second reinforcing seat 24.

[0040] The side plate 26 of the bottom support assembly 2 is provided with a mounting part 5. The upper end of the mounting part 5 is connected to the rotating shaft 9, and the lower end of the mounting part 5 is connected to the side plate 26 by bolts 3.

[0041] Specifically, bolt holes are opened at the lower end of the mounting part 5, and matching bolt holes are also opened at the corresponding positions of the side plate 26. High-strength connecting bolts 3 are selected and passed through the bolt holes of the mounting part 5 and the side plate 26. They are tightened with nuts to fix the mounting part 5 and the side plate 26, thereby achieving a stable connection between the rotating shaft 9 and the bottom support assembly 2. The bolt 3 connection facilitates subsequent disassembly and maintenance.

[0042] The top support assembly 1 includes a first support plate 11, second support plates 12 are disposed at both ends of the first support plate 11, and a third support plate 13 is disposed at the rear of the first support plate 11. The first support plate 11, the second support plate 12, and the third support plate 13 are an integrated structure. Buffer blocks 6 are symmetrically disposed at the rear of the third support plate 13 of the top support assembly 1, with one end face of the buffer block 6 in close contact with the surface of the third support plate 13; the lower end of the buffer block 6 is connected to the bottom plate 25 of the bottom support assembly 2.

[0043] Specifically, the top support assembly 1 is made of one-piece die casting, and high-elasticity polyurethane buffer blocks 6 are embedded on both sides of the rear top of the one-piece bottom support assembly 2. The buffer blocks 6 are made of pressure-resistant and wear-resistant material, which can effectively absorb the instantaneous impact force generated during heavy-load rollover and emergency braking, reduce rigid collisions between components, and reduce structural fatigue damage.

[0044] The oil passage includes a first oil passage 14 and a second oil passage 15. One end of the first oil passage 14 is an oil injection hole, which is blocked by a plug 4. The other end of the first oil passage 14 is connected to one end of the second oil passage 15, and the other end of the second oil passage 15 is connected to a spacer. The first oil passage 14 is perpendicular to the second oil passage 15, and the first oil passage 14 is in the same axial direction as the rotating shaft 9. The second oil passage 15 is perpendicular to the axial direction of the rotating shaft 9.

[0045] A first oil passage 14 is opened along the axial direction on one side of the shaft body of the rotating shaft 9. One end of the first oil passage 14 extends through to the end face of the rotating shaft 9, forming an oil injection hole that communicates with the outside. A plug 4 is provided at the oil injection port. The plug 4 is made of rubber to seal the first oil passage 14. The other end of the first oil passage 14 extends to the middle of the shaft body of the rotating shaft 9. At this point, a second oil passage 15 is opened in a direction perpendicular to the axial direction of the rotating shaft 9. The second oil passage 15 intersects the first oil passage 14 perpendicularly and is completely connected. The other end of the second oil passage 15 extends through to the outer wall surface of the rotating shaft 9 and is connected to the annular gap formed by the inner wall surface of the circular tube 8 that is sleeved on the rotating shaft 9.

[0046] When adding oil, unscrew the plug 4 and inject lubricating oil through the first oil passage 14. The lubricating oil flows along the first oil passage 14 to the intersection with the second oil passage 15, and then is evenly distributed through the second oil passage 15 into the gap between the rotating shaft 9 and the round tube 8 to achieve full lubrication of the mating surfaces of the two.

[0047] The outer wall of the round tube 8 is connected to the second support plate 12 of the top support assembly 1. Oil seals 7 are provided on both sides of the round tube 8. The side of the oil seals 7 is in close contact with the side plate 26 of the bottom support assembly 2.

[0048] Specifically, the circular tube 8 is made of steel, with an inner diameter slightly larger than the outer diameter of the rotating shaft 9, ensuring a uniform annular gap between them. The outer wall of the circular tube 8 is fitted to the corresponding inner wall of the two second support plates 12 of the top support assembly 1, and the circular tube 8 is fixedly connected to the second support plates 12 by welding, so that the circular tube 8 moves synchronously with the top support assembly 1. The oil seal 7 not only seals the gap between the rotating shaft 9 and the circular tube 8, but also prevents external dust and mud from entering, while preventing internal lubricating oil leakage.

[0049] The surface of one end of the rotating shaft 9 is provided with a mounting groove 16, and the limiting ring 10 is set in the mounting groove 16. The limiting ring 10 is detachably connected to the rotating shaft 9; the side of the limiting ring 10 is in close contact with the side plate 26 of the bottom support assembly 2.

[0050] Specifically, one end of the rotating shaft 9 is fixed to the side plate 26 of the bottom support assembly 2 by the mounting part 5 and the bolt 3. The other end has a detachable limiting ring 10 in the mounting groove 16. The side of the limiting ring 10 is in close contact with the side plate 26. At the same time, it works with the oil seals 7 on both sides of the round tube 8 to form a limiting constraint on the rotating shaft 9 from both ends, accurately restricting the axial movement of the rotating shaft 9, ensuring the coaxiality of the rotating shaft 9 during the flipping process, avoiding flipping jamming, and improving the stability of operation.

[0051] The bottom support assembly 2 and the top support assembly 1 improve the overall load-bearing capacity. The addition of a lateral stabilizing tie rod and a buffer block 6, along with the precise limiting structure of the pivot 9, effectively suppresses the shaking of the frame during operation, reduces safety risks and equipment wear, and ensures operational efficiency.

[0052] How to use the rotating support frame of a trailer-mounted dump truck:

[0053] like Figure 3 and Figure 4 As shown, the bottom support assembly 2 is assembled to the left and right sides of the rear of the trailer chassis frame and secured with connecting bolts 3. The top support assembly 1 is then fixedly connected to the bottom of the dump truck body, ensuring that the rotating shaft 9 passes through the corresponding mounting holes of the base and the top support assembly 1, thus completing the overall assembly. The plug 4 on the outside of the rotating shaft 9 is removed, and lubricating oil is injected into the mating gap between the rotating shaft 9 and the round tube 8 through the first oil passage 14 and the second oil passage 15 inside the rotating shaft 9. After the lubricating oil evenly covers the mating surface through the oil passage, the plug 4 is reinstalled to seal the oil injection port.

[0054] When the dump truck is unloading, the top support assembly 1 drives the rotating shaft 9 to rotate around the circular tube 8, achieving tilted unloading. During operation, the reinforcing ribs evenly distribute the weight of the truck body and dynamic impact loads, while the buffer blocks 6 on both sides absorb the impact force generated by heavy-load overturning or emergency braking, reducing rigid collisions of components. During operation, one end of the rotating shaft 9 is fixed to the base by bolts 3, and the other end is fitted with a detachable limiting ring 10 in the mounting groove 16, which works with the oil seals 7 on both sides to restrict the axial movement of the rotating shaft 9, ensuring the coaxiality of the rotating shaft 9 during overturning. The plug 4 and the oil seal 7 work together to prevent dust and mud from entering, and to prevent lubricating oil leakage and wear on the mating surfaces.

[0055] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A rotating bracket for a trailer dumper, characterized in that, The bottom support assembly is internally provided with a top support assembly, and a rotating shaft penetrates through the bottom support assembly and the top support assembly to connect the two; The rotating shaft is sleeved with a circular tube, and the inner wall surface of the circular tube is spaced from the outer wall surface of the rotating shaft, and one side of the rotating shaft is provided with an oil channel which is communicated with the space between the circular tube and the rotating shaft; the rotating shaft is sleeved with an oil seal, and one end surface of the oil seal is tightly attached to the side of the circular tube; one end of the rotating shaft is provided with a plug, and the other end of the rotating shaft is provided with a limiting ring.

2. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 1, characterised in that, The bottom support assembly comprises a bottom plate, and both ends of the bottom plate are provided with side plates which are fixedly connected with the bottom plate; the upper surface of the bottom plate is provided with a plurality of first reinforcing ribs and second reinforcing ribs which are arranged alternately.

3. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 2, characterised in that, The side of the side plate is provided with a first reinforcing seat, and the front of the side plate is provided with a second reinforcing seat, one end of each of the first reinforcing seat and the second reinforcing seat is fixedly connected with the side plate, and the other end is fixedly connected with the bottom plate; the bottom plate, the side plate and the reinforcing ribs are an integrated structure.

4. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 1, wherein, The side of the side plate of the bottom support assembly is provided with a mounting piece, the upper end of the mounting piece is connected with the rotating shaft, and the lower end of the mounting piece is connected with the side plate through bolts.

5. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 1, wherein, The top support assembly comprises a first support plate, both ends of the first support plate are provided with second support plates, and the rear of the first support plate is provided with a third support plate, and the first support plate, the second support plate and the third support plate are an integrated structure.

6. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 1, characterised in that, The buffer blocks are symmetrically arranged at the rear of the third support plate of the top support assembly, and one end surface of the buffer block is tightly attached to the surface of the third support plate; the lower end of the buffer block is connected with the bottom plate of the bottom support assembly.

7. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 1, wherein, The oil channel comprises a first oil channel and a second oil channel, one end of the first oil channel is an oil injection round hole, the one end of the first oil channel is blocked by a plug, the other end of the first oil channel is communicated with one end of the second oil channel, and the other end of the second oil channel is communicated with the space.

8. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 7, characterised in that, The first oil channel is perpendicular to the second oil channel, the first oil channel is in the same axial direction as the rotating shaft, and the second oil channel is perpendicular to the axial direction of the rotating shaft.

9. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 1, characterized in that The outer wall surface of the circular tube is connected with the second support plate of the top support assembly, and both sides of the circular tube are provided with oil seals, and the side surface of the oil seal is tightly attached to the side plate of the bottom support assembly.

10. A rotating bracket for a trailer-mounted self-discharging vehicle as claimed in claim 1, characterized in that The surface of one end of the rotating shaft is provided with a mounting groove, the limiting ring is arranged in the mounting groove, and the limiting ring is detachably connected with the rotating shaft; the side of the limiting ring is tightly attached to the side plate of the bottom support assembly.

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