Sand gravel belt distributing machine

Abstract

The invention discloses a sand gravel belt distributing machine, and relates to the field of sand gravel conveying, the sand gravel belt distributing machine comprises a mounting bracket, a conveyor belt assembly and a smoothing assembly, a plurality of groups of flattening rollers in the smoothing assembly can be directly contacted with sand gravel on the surface of a conveyor belt, and materials which are unevenly stacked are flattened and pressed through the gravity of the flattening rollers; gaps among sand gravels are effectively reduced, the material bearing capacity of the conveying belt in the unit area is closer to the design upper limit, the effective conveying capacity in the unit time is remarkably improved, and the requirement of capital construction projects for efficient feeding is met; and then through the constraint of the first side baffle, the side overflow materials are sent back to the conveying belt main body in the follow-up thin material area of the conveying belt, the materials are prevented from directly falling off, the filtering grating plate can filter large-particle sand gravels exceeding the preset particle size, and meanwhile, the large particles are discharged along the first inclined plate through the guide blades linked with the flattening roller.

Description

Technical Field

[0001] This invention belongs to the field of gravel conveying technology, specifically, it relates to a gravel belt conveyor. Background Technology

[0002] In numerous industries such as sand and gravel production and construction, the sand and gravel belt placing boom plays an indispensable role, undertaking the crucial tasks of material conveying and placement. It is a core piece of machinery specifically designed for infrastructure projects such as construction, water conservancy, and road and bridge engineering, enabling the continuous conveying and precise placement of bulk materials such as sand and gravel aggregates. Based on the core principle of belt conveying, it efficiently transports sand and gravel from raw material stockpiles to designated construction areas (such as concrete mixing plant silos, roadbed filling sites, and dam pouring surfaces) through the coordinated operation of its mechanical structure. It serves as a crucial link between raw material supply and engineering construction, directly impacting the efficiency, cost, and quality of project construction.

[0003] However, traditional sand and gravel belt conveyor systems have revealed many problems in long-term operation, which seriously restrict the improvement of production efficiency and economic benefits. Chinese utility model patent CN217296468U discloses a fully automatic sand and gravel aggregate belt conveyor system, including a raw material stockpile, a material placement mechanism, a material placement trolley, and a feeding mechanism. Multiple raw material stockpiles are provided. The material placement mechanism is fixed above the multiple raw material stockpiles by a first pre-embedded bracket. A traveling material placement belt is installed in the middle of the material placement mechanism. The material placement trolley is installed on the frame of the material placement mechanism. The feeding mechanism is installed at both ends of the material placement mechanism.

[0004] While the aforementioned material distribution device can reduce noise, in gravel belt conveyor operations, factors such as feed uniformity and material accumulation characteristics often lead to variations in the unit area load of gravel on different areas of the conveyor belt. This results in uneven gravel accumulation height on the belt surface, with some areas having excessively high material accumulation exceeding the belt's side constraint range, while other areas have shallow accumulation. This height difference causes two major problems: firstly, excessively high accumulation of gravel is prone to falling from the belt edge due to centrifugal force and vibration during belt operation (especially at bends and inclined sections), causing material loss and environmental pollution; secondly, material falling directly reduces the total amount of gravel actually being conveyed, causing the effective conveying capacity per unit time to deviate from the design value, ultimately reducing overall conveying efficiency and increasing engineering construction costs and schedule pressure. Therefore, this invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a gravel belt conveyor that can overcome or at least partially solve the above problems.

[0006] To address the issues raised in the background section regarding the uneven load-bearing capacity of gravel per unit area on different zones of a conveyor belt during gravel conveyor operations, caused by factors such as feed uniformity and material accumulation characteristics, resulting in uneven gravel accumulation height on the belt surface—with some areas having excessively high accumulation exceeding the belt's side constraints, while others have shallow accumulation—this height difference leads to two core problems: firstly, excessively high accumulations of gravel are prone to falling from the belt edges during operation due to centrifugal force and vibration, causing material loss and environmental pollution; secondly, material falling directly reduces the total amount of gravel actually being conveyed, causing the effective conveying capacity per unit time to deviate from the design value, ultimately reducing overall conveying efficiency and increasing construction costs and schedule pressure. The basic concept of the technical solution adopted in this invention is as follows: A gravel belt conveyor includes a mounting bracket, a conveyor belt assembly is provided at the bottom inner side of the mounting bracket, and a smoothing component is installed above the conveyor belt assembly. The smoothing component can level and compact the gravel on the conveyor belt assembly, and store the excess gravel before adding it back to the top of the conveyor belt assembly.

[0007] Furthermore, the smoothing component includes an assembly bracket, side frames, and flattening rollers. The two side frames are fixedly connected to the bottom sides of the assembly bracket, and multiple flattening rollers are rotatably connected between the two side frames. The flattening rollers contact the top of the gravel and smooth the accumulated gravel.

[0008] Furthermore, the smoothing component also includes a rotating shaft and a slot. Multiple slots are provided on both sides of the side frame. The two ends of each flattening roller are fixedly connected to a rotating shaft that is inserted into the slot. The gravel will cause the flattening roller to drive the rotating shaft to move upward inside the slot.

[0009] Furthermore, the assembly bracket is detachably connected to a triangular smoothing body, with the tip of the triangular smoothing body facing the feed end. The bottom of the triangular smoothing body is provided with multiple slots that can accommodate the upward movement of the flattening roller. The triangular smoothing body pushes excess gravel to both sides.

[0010] Furthermore, a second inclined plate that slopes towards the center is fixedly connected to the bottom of both side frames, and a first side baffle is fixedly connected to both ends of the second inclined plate.

[0011] Furthermore, filter grid plates are detachably connected to the two opposite sides of the side frame, guide blades are detachably connected to the outer wall of each rotating shaft, a first inclined plate is fixedly connected to the outer wall of each first side baffle, and a second side baffle is fixedly connected to the outside of each first inclined plate. The filter grid plates filter larger gravel. When the flattening roller contacts the gravel on the conveyor belt assembly, it rotates and drives the guide blades to rotate through the rotating shaft, conveying the larger gravel on the filter grid plates to one side and discharging it outward through the first inclined plate.

[0012] Furthermore, a shaping frame is provided on the outside of the rotating part at the bottom of the mounting bracket of the conveyor belt assembly. Inclined shovels are provided at both ends of the shaping frame. The inclined shovels fit against the upper and lower outer walls of the conveyor belt assembly. Connecting plates are fixedly connected to both ends of the shaping frame. The connecting plates on both sides are detachably connected to the mounting bracket.

[0013] Furthermore, it also includes an adjustment component, which is located near the upper end of the mounting bracket. The upper end of the mounting bracket is detachably connected to a connecting bracket, and the outer walls of the two side frames are rotatably connected to movable wheels. The movable wheels are slidably connected to the mounting bracket, and the adjustment component adjusts the position of the smoothing component at the upper end of the mounting bracket.

[0014] Furthermore, the adjustment component includes a drive motor, a transmission roller, a pulley block, and a traction rope. The drive motor is located near the center of the upper end of the mounting bracket. The rotating end of the drive motor is detachably connected to the transmission roller. The two ends of the mounting bracket are equipped with pulley blocks. A traction rope is connected to the connecting bracket. The traction rope passes through the pulley blocks in sequence and is wound around the transmission roller. The rotation of the drive motor drives the transmission roller to rotate, thereby enabling the smoothing component to move laterally at the upper end of the mounting bracket via the traction rope.

[0015] Furthermore, it also includes a support assembly, which is installed at both ends of the mounting bracket. The support assembly includes telescopic tubes located at both ends of the mounting bracket and distributed on the left and right. The telescopic ends of the telescopic tubes on the same side are detachably connected to support plates. Telescopic cylinders are rotatably connected to the upper sides of the support plates. The base of the telescopic cylinders is rotatably connected to the outer wall of the telescopic tubes. Rollers are rotatably connected to the bottom sides of the support plates. The extension and retraction of the telescopic cylinders can cause the support plates to move outward. The tilt angle of the mounting bracket can be adjusted by the height difference between the two support plates.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. In this invention, the multiple sets of flattening rollers in the smoothing component can directly contact the gravel on the surface of the conveyor belt. By their own gravity, they can flatten and compact the unevenly piled material, effectively reducing the gaps between the gravel and making the material load per unit area of ​​the conveyor belt closer to the design limit. This significantly improves the effective conveying capacity per unit time and meets the needs of infrastructure projects for efficient material supply.

[0017] 2. In this invention, regarding the side overflow problem caused by excessive material accumulation: the triangular smoothing body can guide the gravel exceeding the bearing height to both sides into the second inclined plate, and then constrain it through the first side baffle. In the thinner area of ​​the material in the subsequent part of the conveyor belt, the overflowing material is returned to the main body of the conveyor belt, preventing the material from falling directly. Regarding the falling problem caused by large particles: the filter grid plate can filter large particles of gravel exceeding the preset particle size. At the same time, the guide blades linked to the flattening roller discharge the large particles along the first inclined plate, preventing large particles from getting stuck or lifting the flattening roller, causing the surrounding material to fall. Ultimately, the material loss rate is controlled at a low level, reducing resource waste.

[0018] 3. In this invention, the support component, through the combination structure of telescopic cylinder and telescopic tube, can flexibly adjust the tilt angle of the installation bracket according to the construction scenario to meet the requirements of different projects for material conveying height difference; at the same time, the rolling wheels at the bottom of the support plate can realize the rapid transfer of the entire equipment without relying on large hoisting equipment, and adapt to the layout changes of material placement in multiple areas within the construction site.

[0019] 4. In this invention, the adjustment component can drive the smoothing component to move laterally along the upper end of the mounting bracket through the transmission logic of the drive motor, transmission roller and traction rope. It can adjust the smoothing position in real time according to the material accumulation difference in different areas of the conveyor belt, avoid the problem of local smoothing failure of the traditional fixed smoothing structure, and adapt to the conveying characteristics of gravel with different particle sizes.

[0020] 5. In this invention, the inclined shovel plate of the shaping frame can closely fit the upper and lower outer walls of the conveyor belt rotation section. On the one hand, it can thoroughly clean the residual sand, gravel, dust and other impurities on the surface of the conveyor belt, preventing the conveyor belt from running off-track due to impurities. On the other hand, the filter grid plate discharges large particles in advance, which can avoid equipment jamming caused by large particles getting stuck between the flattening roller and the conveyor belt, and significantly reduce the frequency of downtime due to malfunctions.

[0021] 6. In this invention, the rotating shaft and interlocking groove structure of the flattening roller in the smoothing component allow the flattening roller to avoid hard particles that cannot be flattened, thus preventing wear caused by hard collision between the flattening roller and the conveyor belt. The shaping frame can perform tensioning and flattening treatment on the conveyor belt, reducing local stress concentration caused by slack and wrinkles, and extending the replacement cycle of the conveyor belt.

[0022] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0023] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a gravel conveyor belt conveyor according to the present invention; Figure 2This is a front view structural schematic diagram of the gravel conveyor belt feeder of the present invention; Figure 3 This is a top view schematic diagram of the gravel conveyor belt distribution machine of the present invention; Figure 4 This is a side view of the gravel conveyor belt distribution machine of the present invention. Figure 5 For the present invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the smoothing component structure of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the leveling component structure of the present invention; Figure 9 This is a schematic diagram of the rear view structure of the smoothing component of the present invention.

[0024] In the diagram: 100, mounting bracket; 101, conveyor belt assembly; 200. Support assembly; 201. Support plate; 202. Roller; 203. Telescopic cylinder; 204. Telescopic tube body; 300. Smoothing component; 301. Assembly bracket; 302. Triangular smoothing body; 303. Side frame; 304. Moving wheel; 305. Flattening roller; 306. Rotating shaft; 307. Insertion slot; 308. Guide blade; 309. First side baffle; 310. First inclined plate; 311. Second side baffle; 312. Connecting bracket; 313. Second inclined plate; 314. Filter grid plate; 400. Adjustment assembly; 401. Drive motor; 402. Transmission roller; 403. Pulley block; 404. Traction rope; 500. Shaping frame; 501. Inclined shovel plate; 502. Connecting plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] Reference Figures 1-3This is a schematic diagram of a gravel belt conveyor in this embodiment. The gravel belt conveyor in this embodiment includes a mounting bracket 100. A conveyor belt assembly 101 is provided on the inner bottom of the mounting bracket 100. Support assemblies 200 are detachably connected to both ends of the mounting bracket 100. A smoothing assembly 300 is installed above the conveyor belt assembly 101. An adjusting assembly 400 is installed near the upper end of the mounting bracket 100. The adjusting assembly 400 drives the smoothing assembly 300 to move laterally at the upper end of the mounting bracket 100. In this embodiment, the smoothing assembly 300 can level and compact the gravel on the conveyor belt assembly 101. The adjusting assembly 400 can adjust the position of the smoothing assembly 300 at the upper end of the mounting bracket 100 according to actual needs. The support assemblies 200 can adjust the tilt angle of the mounting bracket 100 to meet the usage requirements under different conditions.

[0027] like Figure 5 As shown, this is the embodiment of the present invention. Figure 1 The enlarged structural diagram at point A shows that the support component 200 includes telescopic tubes 204 disposed at both ends of the mounting bracket 100 and distributed to the left and right. The telescopic ends of the telescopic tubes 204 on the same side are detachably connected to support plates 201. Telescopic cylinders 203 are rotatably connected to the upper ends of the support plates 201. The base of the telescopic cylinders 203 is rotatably connected to the outer wall of the telescopic tubes 204. Rolling wheels 202 are rotatably connected to the bottom sides of the support plates 201. In this embodiment, the extension and retraction of the telescopic cylinders 203 can cause the support plates 201 to move outward. The height difference between the two support plates 201 can adjust the tilt angle of the mounting bracket 100. The rolling wheels 202 facilitate the movement of the mounting bracket 100 to a suitable position.

[0028] like Figure 6 As shown, this is a schematic diagram of the smoothing component structure in this embodiment. The smoothing component 300 includes an assembly bracket 301, side frames 303, and flattening rollers 305. The two side frames 303 are fixedly connected to the bottom sides of the assembly bracket 301. Multiple flattening rollers 305 are rotatably connected between the two side frames 303. In this embodiment, when the conveyor belt assembly 101 rotates to transport gravel, the flattening rollers 305 contact the top of the gravel, thereby smoothing the accumulated gravel, reducing the gaps between the gravel, and allowing more gravel to be transported per unit time.

[0029] like Figure 6 as well as Figure 7As shown, the smoothing component 300 also includes a rotating shaft 306 and an insertion slot 307. Multiple insertion slots 307 are provided on the side frames 303 on both sides. The two ends of each flattening roller 305 are fixedly connected to the rotating shaft 306 inserted into the insertion slot 307. In this embodiment, when the conveyor belt assembly 101 conveys gravel, the gravel is smoothed and compacted by the gravity of the flattening roller 305. Gravel that cannot be compacted will cause the flattening roller 305 to drive the rotating shaft 306 to move upward inside the insertion slot 307. After passing through the gravel that cannot be compacted, it falls down by gravity, thereby preventing the gravel on the conveyor belt assembly 101 from being pushed down.

[0030] like Figure 6 as well as Figure 7 As shown, a triangular smoothing body 302 is detachably connected inside the mounting bracket 301. The tip of the triangular smoothing body 302 faces the feed end. The bottom of the triangular smoothing body 302 is provided with multiple slots that can accommodate the upward movement of the flattening roller 305. The bottom of the two side frames 303 is fixedly connected to a second inclined plate 313 that is inclined towards the center. The two ends of the two side inclined plates 313 are fixedly connected to a first side baffle 309. In this embodiment, when it is impossible to flatten the higher gravel and make the flattening roller 305 move upward, the gravel at the top is pushed to both sides by the triangular smoothing body 302, and can then enter the interior of the second inclined plate 313. The gravel is then restricted by the first side baffles 309 on both sides. This allows the gravel inside the second inclined plate 313 to return to the top of the conveyor belt assembly 101 when there is less gravel in the subsequent section, thereby preventing the gravel from falling during conveying.

[0031] like Figure 7 As shown, this is the embodiment of the present invention. Figure 6 The enlarged structural diagram at point B shows that filter grid plates 314 are detachably connected to the opposite sides of the side frame 303. Guide blades 308 are detachably connected to the outer wall of each rotating shaft 306. A first inclined plate 310 is fixedly connected to the outer wall of each first side baffle 309. A second side baffle 311 is fixedly connected to the outside of each first inclined plate 310. In this embodiment, when some gravel spreads to both sides above the filter grid plate 314 through the triangular smoothing body 302, the larger gravel is filtered by the filter grid plate 314. When the flattening roller 305 contacts the gravel on the conveyor belt assembly 101, it rotates, which in turn drives the guide blades 308 to rotate through the rotating shaft 306. This transports the larger gravel on the filter grid plate 314 to one side and discharges it outward through the first inclined plate 310, thereby preventing the larger gravel from returning to the conveyor belt assembly 101 and falling off during the conveying process.

[0032] like Figure 8As shown, this is a schematic diagram of the leveling component structure in this embodiment. A shaping frame 500 is provided on the outside of the rotating part at the bottom of the mounting bracket 100 of the conveyor belt assembly 101. Inclined shovels 501 are provided at both ends of the shaping frame 500. The inclined shovels 501 fit against the upper and lower outer walls of the conveyor belt assembly 101. Connecting plates 502 are fixedly connected to both ends of the shaping frame 500. The connecting plates 502 on both sides are detachably connected to the mounting bracket 100. In this embodiment, the shaping frame 500 can level the conveyor belt assembly 101 after conveying gravel, and the inclined shovels 501 can also clean the outer wall of the conveyor belt assembly 101, thereby preventing impurities from adhering to the outside of the conveyor belt assembly 101. On the one hand, this prevents impurities from causing the conveyor belt assembly 101 to deviate, and on the other hand, it prevents impurities from affecting the subsequent transportation of gravel.

[0033] like Figure 4 , Figure 7 as well as Figure 9 As shown, this is a schematic diagram of the moving component structure in this embodiment. The upper end of the mounting bracket 301 is detachably connected to the connecting bracket 312. The outer walls of the two side frames 303 are rotatably connected to the moving wheels 304. The moving wheels 304 are slidably connected to the mounting bracket 100. The adjusting component 400 includes a drive motor 401, a transmission roller 402, a pulley block 403, and a traction rope 404. The drive motor 401 is located at the center of the upper end of the mounting bracket 100. The rotating end of the drive motor 401 is detachably connected to the transmission roller 402. The two ends of the mounting bracket 100 are provided with pulley blocks 403. The connecting bracket 312 is connected to the traction rope 404. The traction rope 404 passes through the pulley block 403 in sequence and is wound around the transmission roller 402. In this embodiment, the drive motor 401 rotates to drive the transmission roller 402 to rotate, thereby driving the smoothing component 300 to move laterally at the upper end of the mounting bracket 100 through the traction rope 404. Thus, the position of the smoothing component 300 can be adjusted according to actual needs.

[0034] Contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention.

Claims

1. A gravel conveyor belt distribution machine, comprising a mounting bracket (100), wherein a conveyor belt assembly (101) is disposed on the inner bottom side of the mounting bracket (100), characterized in that, A smoothing component (300) is installed above the conveyor belt assembly (101). The smoothing component (300) can level and compact the gravel on the conveyor belt assembly (101) and store the excess gravel before adding it back to the top of the conveyor belt assembly (101).

2. The gravel conveyor belt conveyor according to claim 1, characterized in that, The smoothing component (300) includes an assembly bracket (301), side frames (303), and flattening rollers (305). The two side frames (303) are fixedly connected to the bottom sides of the assembly bracket (301), and multiple flattening rollers (305) are rotatably connected between the two side frames (303). The flattening rollers (305) contact the top of the gravel and smooth the accumulated gravel.

3. The gravel conveyor belt conveyor according to claim 1 or 2, characterized in that, The smoothing assembly (300) also includes a rotating shaft (306) and a slot (307). Multiple slots (307) are provided on the side frames (303) on both sides. The two ends of each flattening roller (305) are fixedly connected to the rotating shaft (306) inserted into the slot (307). The gravel will cause the flattening roller (305) to drive the rotating shaft (306) to move upward inside the slot (307).

4. The gravel conveyor belt conveyor according to claim 3, characterized in that, The assembly bracket (301) is detachably connected to a triangular smoothing body (302). The tip of the triangular smoothing body (302) faces the feed end. The bottom of the triangular smoothing body (302) is provided with multiple slots that can accommodate the upward movement of the flattening roller (305). The triangular smoothing body (302) pushes excess gravel to both sides.

5. The gravel conveyor belt conveyor according to claim 1, characterized in that, The bottom of the two side frames (303) is fixedly connected to a second inclined plate (313) that is inclined toward the center, and the two ends of the second inclined plate (313) are fixedly connected to a first side baffle (309).

6. The gravel conveyor belt conveyor according to claim 1, characterized in that, The two opposite sides of the side frame (303) are detachably connected to filter grid plates (314), the outer wall of each rotating shaft (306) is detachably connected to guide blades (308), the outer wall of each first side baffle (309) is fixedly connected to a first inclined plate (310), and the outer side of each first inclined plate (310) is fixedly connected to a second side baffle (311). The filter grid plates (314) filter larger gravel. When the flattening roller (305) contacts the gravel on the conveyor belt assembly (101), it rotates and drives the guide blades (308) to rotate through the rotating shaft (306), which conveys the larger gravel on the filter grid plates (314) to one side and discharges it outward through the first inclined plate (310).

7. The gravel conveyor belt conveyor according to claim 1, characterized in that, A shaping frame (500) is provided on the outside of the rotating part at the bottom of the mounting bracket (100) of the conveyor belt assembly (101). An inclined shovel (501) is provided at both ends of the shaping frame (500). The inclined shovel (501) fits against the upper and lower outer walls of the conveyor belt assembly (101). A connecting plate (502) is fixedly connected to both ends of the shaping frame (500). The connecting plates (502) on both sides are detachably connected to the mounting bracket (100).

8. The gravel conveyor belt conveyor according to claim 1, characterized in that, It also includes an adjustment component (400), which is located near the upper end of the mounting bracket (100). The upper end of the mounting bracket (301) is detachably connected to a connecting bracket (312). The outer walls of the two side frames (303) are rotatably connected to movable wheels (304). The movable wheels (304) are slidably connected to the mounting bracket (100). The adjustment component (400) adjusts the position of the smoothing component (300) at the upper end of the mounting bracket (100).

9. The gravel conveyor belt conveyor according to claim 8, characterized in that, The adjustment assembly (400) includes a drive motor (401), a transmission roller (402), a pulley block (403), and a traction rope (404). The drive motor (401) is located at the center of the upper end of the mounting bracket (100). The rotating end of the drive motor (401) is detachably connected to the transmission roller (402). The two ends of the mounting bracket (100) are provided with pulley blocks (403). The traction rope (404) is connected to the connecting bracket (312). The traction rope (404) passes through the pulley block (403) in sequence and then winds around the transmission roller (402). The drive motor (401) rotates and drives the transmission roller (402) to rotate, thereby driving the smoothing assembly (300) to move laterally at the upper end of the mounting bracket (100) through the traction rope (404).

10. The gravel conveyor belt conveyor according to claim 1, characterized in that, It also includes a support assembly (200), which is installed at both ends of the mounting bracket (100). The support assembly (200) includes telescopic tubes (204) arranged at both ends of the mounting bracket (100) and distributed on the left and right. The telescopic ends of the telescopic tubes (204) on the same side are detachably connected to a support plate (201). The upper ends of the support plate (201) are rotatably connected to telescopic cylinders (203). The base of the telescopic cylinder (203) is rotatably connected to the outer wall of the telescopic tube (204). Rollers (202) are rotatably connected to the bottom sides of the support plate (201). The extension and retraction of the telescopic cylinder (203) can make the support plate (201) move outward. The tilt angle of the mounting bracket (100) can be adjusted by the height difference between the two support plates (201).

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