Lightweight semi-trailer with supporting means

Abstract

The application discloses a lightweight semitrailer with a supporting device, which comprises a mounting plate. When in use, the square hole round pipe is rotated by starting the servo motor, the square hole round pipe drives the square rod to rotate, and the transmission rod is rotated, the transmission rod is rotated through the meshing of the transmission bevel gear and the driven bevel gear, the rotating shaft is rotated, and the adjacent hollow cylinders are turned down, so that the two hollow cylinders are perpendicular to the ground. Then, the two second air cylinders are started to push the two lifting blocks to move downwards, so that the several bearing plates are in contact with the ground. Then, the two first air cylinders are started to pull the two supporting plates away from each other, and the bottoms of the two supporting plates are respectively attached to the tops of the adjacent rectangular blocks, so that the middle position of the semitrailer can be supported when loading and unloading goods, the middle part of the carriage is effectively prevented from being broken under stress, and the fracture of the rotating shaft caused by excessive bearing capacity is avoided.

Description

Technical Field

[0001] This invention relates to the field of vehicle transportation technology, specifically to a lightweight semi-trailer with a support device. Background Technology

[0002] A semi-trailer is a trailer whose axle is located behind the vehicle's center of gravity and is equipped with a coupling device that transmits horizontal and vertical forces to the tractor. Semi-trailers are generally three-axle semi-trailers, and they come in many types, including 11-meter stake semi-trailers, 13-meter stake semi-trailers, and low-flatbed semi-trailers.

[0003] In existing technologies, stress concentration occurs in the middle of the semi-trailer cargo box during loading and unloading, which can easily cause the cargo box to break from the waist. Therefore, a support device is needed to support and protect it. Summary of the Invention

[0004] The technical problem solved by the present invention is to overcome the defects of the prior art and provide a lightweight semi-trailer with a support device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A lightweight semi-trailer with a support device includes a mounting plate. Connecting plates are fixedly connected to the bottom of the mounting plate near both the left and right sides. A first bearing is fixedly connected to the connecting plate near its bottom. Rectangular blocks are provided on adjacent sides of both connecting plates, and a rotating shaft passes through both rectangular blocks. A dust cover is fixedly connected to the bottom left side of the left connecting plate. The right end of the rotating shaft passes through the inner cavity of the adjacent first bearing, and the left end of the rotating shaft passes through the adjacent first bearing, extending into the inner cavity of the dust cover, and is fixedly connected to a driven bevel gear. A transmission bevel gear meshes with the top of the driven bevel gear, and a transmission rod is fixedly connected to the center of the top of the transmission bevel gear. A cross plate is fixedly connected to the bottom left side of the left connecting plate, and a second bearing is fixedly connected to the cross plate. The top of the transmission rod passes through the inner cavity of the second bearing and is fixedly connected to a square rod. A square-hole round tube is fitted on the outer side of the end, and a motor housing is attached to the left side of the connecting plate on the left side near the middle position. A snap-fit ​​mechanism is provided between the motor housing and the connecting plate. The bottom of the motor housing is attached to the top of the dust cover, and a servo motor is fixedly installed at the top of the inner cavity of the motor housing. An opening is provided at the bottom of the motor housing. The power output end of the servo motor is fixedly connected to the top of the square-hole round tube. A limiting mechanism is provided at the top of each of the two rectangular blocks. A third bearing is fixedly connected to the bottom of each of the two rectangular blocks, and a movable shaft is inserted into the inner cavity of the third bearing. A hollow cylinder is fixedly connected to the bottom of each of the two movable shafts, and a movable ring is fitted on the outer wall of the hollow cylinder near the bottom. A lifting mechanism is provided on the inner side of the movable ring. Limiting slots are provided on the left and right sides of each of the two hollow cylinders near the bottom. Three support rods are fixedly connected to the outer wall of each of the two movable rings, and a load-bearing plate is fixedly connected to the other end of each of the three support rods.

[0006] Preferably, the locking mechanism includes a locking block, which is fixedly connected to the middle position on the right side of the motor housing. A locking groove is provided on the left side of the connecting plate located on the left side, and a positioning groove is provided at the bottom of the inner cavity of the locking groove. The locking block is inserted into the inner cavity of the locking groove, and a positioning block is fixedly connected to the bottom of the locking block. The positioning block is inserted into the inner cavity of the positioning groove.

[0007] Preferably, a fixing block is fixedly connected to the top right side of the motor housing, and a cavity is formed on the fixing block. A limiting block is fitted into the inner cavity of the cavity near the middle position, and a plug rod is inserted through both the left and right sides of the limiting block. Through holes are formed on both the left and right sides of the fixing block. A blind hole is formed on the left side of the connecting plate located on the left side near the top. The right end of the plug rod passes through the adjacent through hole and is inserted into the inner cavity of the blind hole. The left end of the plug rod passes through the inner cavity of the adjacent through hole and is hinged with a pull ring. A spring is sleeved on the outside of the plug rod, and the left and right ends of the spring are fixedly connected to the inner sidewall of the cavity and the limiting block, respectively.

[0008] Preferably, the limiting mechanism includes a support plate, which is fitted to the top of the rectangular block. A first cylinder is fixedly installed on the connecting plate near the top, and the power end of the first cylinder is fixedly connected to the support plate. A slider is fixedly connected to the top of the support plate. Slide grooves are provided on the bottom of the mounting plate near the left and right sides, and the sliders are movably connected to the inner cavities of adjacent slide grooves.

[0009] Preferably, the mounting plate has a plurality of threaded holes evenly distributed on its top and bottom.

[0010] Preferably, the lifting mechanism includes a second cylinder, which is fixedly installed at the top of the inner cavity of the hollow cylinder. The power end of the second cylinder is fixedly connected to a lifting block, and sliding blocks are fixedly connected to both the left and right sides of the lifting block. The two sliding blocks, on opposite sides, pass through the adjacent limiting slotted inner cavity and are both fixedly connected to the inner wall of the movable ring.

[0011] Preferably, the two hollow cylinders are fixedly connected to a support frame on adjacent sides, and the support frame is made of manganese steel.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention enables the servo motor to rotate a square-hole round tube, which in turn rotates a square rod, which in turn rotates a transmission rod. The rotation of the transmission rod, through the meshing of a transmission bevel gear and a driven bevel gear, drives the rotating shaft to rotate. The rotation of the rotating shaft causes two rectangular blocks to rotate and causes adjacent hollow cylinders to flip downwards, making the two hollow cylinders perpendicular to the ground. Then, two second cylinders are activated to push two lifting blocks downwards. The downward movement of the lifting blocks causes the movable ring to slide downwards on the outside of the hollow cylinders, thereby bringing several load-bearing plates into contact with the ground. Then, two first cylinders are activated to pull two support plates away from each other, so that the bottom of the two support plates respectively fits against the top of the adjacent rectangular blocks. This provides support for the middle of the semi-trailer during loading and unloading, effectively preventing the middle of the trailer from breaking under stress. At the same time, it avoids the shaft from breaking due to excessive load.

[0014] 2. This invention, through the installation of a motor housing and dust cover, can provide dust protection for the servo motor and drive components, thereby improving the service life of the components. When the servo motor needs to be inspected and maintained, pulling the pull ring moves the insertion rod to the left, and the limit block squeezes the spring to the left, thereby pulling the right end of the insertion rod out of the blind hole cavity. Then, pushing the motor housing upward moves it, causing the positioning block to disengage from the positioning groove cavity. The upward movement of the motor housing drives the servo motor upward, causing the square hole tube to disengage from the outside of the square rod. Finally, by pulling the motor housing to the left, the servo motor can be removed from the support device, improving the convenience of inspection and maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a top view of the mounting plate for the components of this invention;

[0017] Figure 3 This is a top view of the hollow cylinder component of the present invention;

[0018] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 5 for Figure 1 Enlarged view of point B in the middle.

[0020] The following are the labeling elements in the diagram: 1. Mounting plate; 2. Connecting plate; 3. Rectangular block; 4. Rotating shaft; 5. Driven bevel gear; 6. Motor housing; 7. Movable shaft; 8. Hollow cylinder; 9. Second cylinder; 10. Lifting block; 11. Movable ring; 12. Support rod; 13. Load-bearing plate; 14. Support frame; 15. Support plate; 16. First cylinder; 17. Dust cover; 18. Servo motor; 19. Transmission bevel gear; 20. Transmission rod; 21. Square rod; 22. Square hole round tube; 23. Slot; 24. Locking block; 25. Positioning slot; 26. Positioning block; 27. Fixing block; 28. Limiting block; 29. ​​Insert rod; 30. Spring; 31. Pull ring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-5This invention provides a technical solution: a lightweight semi-trailer with a support device, including a mounting plate 1. The mounting plate 1 has several threaded holes evenly distributed on its top and bottom. Connecting plates 2 are fixedly connected to the bottom of the mounting plate 1 near both the left and right sides. A first bearing is fixedly connected to the connecting plate 2 near its bottom. Rectangular blocks 3 are provided on adjacent sides of the two connecting plates 2, and a rotating shaft 4 passes through both rectangular blocks 3. A dust cover 17 is fixedly connected to the bottom left side of the left connecting plate 2. The right end of the rotating shaft 4 passes through the adjacent first bearing. The inner cavity of the bearing is supported, and the left end of the rotating shaft 4 passes through the adjacent first bearing, extending into the inner cavity of the dust cover 17, and is fixedly connected to the driven bevel gear 5. The top of the driven bevel gear 5 meshes with the transmission bevel gear 19, and the center of the top of the transmission bevel gear 19 is fixedly connected to the transmission rod 20. A horizontal plate is fixedly connected to the left side of the connecting plate 2 on the left side near the bottom, and a second bearing is fixedly connected to the horizontal plate. The top end of the transmission rod 20 passes through the inner cavity of the second bearing and is fixedly connected to the square rod 21, and a matching square hole is sleeved on the outer side of the top end of the square rod 21. The circular tube 22 has a motor housing 6 attached to the left side of the connecting plate 2 near the center. A snap-fit ​​mechanism is provided between the motor housing 6 and the connecting plate 2. The bottom of the motor housing 6 is attached to the top of the dust cover 17. A servo motor 18 is fixedly installed at the top of the inner cavity of the motor housing 6. An opening is provided at the bottom of the motor housing 6. The power output end of the servo motor 18 is fixedly connected to the top of the square-hole circular tube 22. Limiting mechanisms are provided at the top of both rectangular blocks 3, and third bearings are fixedly connected to the bottom of both rectangular blocks 3. A third bearing is inserted into the inner cavity of the third bearing. The two hollow cylinders 7 are fixedly connected to the bottom ends of each other. The outer side wall of the hollow cylinder 8 is fitted with a movable ring 11 near the bottom end. The inner side of the movable ring 11 is equipped with a lifting mechanism. Limit slots are opened on the left and right sides of the two hollow cylinders 8 near the bottom end. Three support rods 12 are fixedly connected to the outer side wall of each of the two movable rings 11. The other end of each of the three support rods 12 is fixedly connected to a load-bearing plate 13. The two hollow cylinders 8 are fixedly connected to a support frame 14 on adjacent sides. The support frame 14 is made of manganese steel to improve the stability of the support structure.

[0023] The locking mechanism includes a locking block 24, which is fixedly connected to the middle of the right side of the motor housing 6. A locking groove 23 is provided on the left side of the connecting plate 2 on the left side, and a positioning groove 25 is provided at the bottom of the inner cavity of the locking groove 23. The locking block 24 is inserted into the inner cavity of the locking groove 23, and a positioning block 26 is fixedly connected to the bottom of the locking block 24. The positioning block 26 is inserted into the inner cavity of the positioning groove 25. A fixing block 27 is fixedly connected to the top right side of the motor housing 6, and a cavity is provided on the fixing block 27. A limiting block 2 is fitted into the inner cavity of the cavity near the middle position. 8. The left and right sides of the limiting block 28 are provided with a rod 29. The left and right sides of the fixing block 27 are provided with through holes. The left side of the connecting plate 2 on the left side is provided with a blind hole near the top. The right end of the rod 29 passes through the adjacent through hole and is inserted into the inner cavity of the blind hole. The left end of the rod 29 passes through the inner cavity of the adjacent through hole and is hinged with a pull ring 31. The outside of the rod 29 is fitted with a spring 30. The left and right ends of the spring 30 are fixedly connected to the inner side wall of the cavity and the limiting block 28 respectively, which facilitates the disassembly, inspection and maintenance of the servo motor 18 in the future.

[0024] The limiting mechanism includes a support plate 15, which is attached to the top of the rectangular block 3. A first cylinder 16 is fixedly installed on the connecting plate 2 near the top, and the power end of the first cylinder 16 is fixedly connected to the support plate 15. A slider is fixedly connected to the top of the support plate 15. Slide grooves are opened on the bottom of the mounting plate 1 near the left and right sides, and the sliders are movably connected to the inner cavity of the adjacent slide grooves to avoid the bearing capacity of the support device being too large and causing the shaft 4 to break.

[0025] The lifting mechanism includes a second cylinder 9, which is fixedly installed on the top of the inner cavity of the hollow cylinder 8. The power end of the second cylinder 9 is fixedly connected to a lifting block 10, and sliding blocks are fixedly connected to both the left and right sides of the lifting block 10. The two sliding blocks, on opposite sides, pass through the adjacent limiting slotted inner cavity and are fixedly connected to the inner wall of the movable ring 11, which facilitates the retraction and extension of the support structure and avoids occupying space.

[0026] Working Principle: In use, the invention utilizes several threaded holes to facilitate the bolting of the mounting plate 1 to the bottom of the semi-trailer. When support is needed for the semi-trailer, the servo motor 18 rotates the square-hole tube 22, which in turn rotates the square rod 21 and the transmission rod 20. The transmission rod 20, through the meshing of the transmission bevel gear 19 and the driven bevel gear 5, rotates the rotating shaft 4. The rotating shaft 4 rotates the two rectangular blocks 3, causing the adjacent hollow cylinders 8 to flip downwards, making them perpendicular to the ground. The movable shaft 7 allows the hollow cylinders 8 to rotate, adjusting the positions of the load-bearing plates 13 to prevent uneven ground from affecting the stability of the support. Next, two second cylinders 9 are activated to push two lifting blocks 10 downwards. The downward movement of the lifting blocks 10 causes the movable ring 11 to slide downwards on the outside of the hollow cylinders 8, bringing the load-bearing plates 13 into contact with the ground. Finally, two first cylinders 16 are activated. Pulling the two support plates 15 away from each other, so that the bottom of the two support plates 15 respectively fits against the top of the adjacent rectangular block 3, can support the middle position of the semi-trailer during loading and unloading, effectively preventing the middle of the truck bed from breaking under stress. At the same time, it can prevent the shaft 4 from breaking due to excessive load. In addition, the motor housing 6 and dust cover 17 can protect the servo motor 18 and drive components from dust, improving the service life of the components. When the servo motor 18 needs to be inspected and maintained, the pull ring 3 can be pulled. 1. Move the insertion rod 29 to the left and squeeze the spring 30 to the left through the limiting block 28, thereby pulling the right end of the insertion rod 29 out of the blind hole cavity. Then, push the motor housing 6 to move upward and make the positioning block 26 disengage from the positioning groove 25 cavity. The upward movement of the motor housing 6 drives the servo motor 18 to move upward and makes the square hole round tube 22 disengage from the outside of the square rod 21. Then, by pulling the motor housing 6 to the left, the servo motor 18 can be removed from the support device, which improves the convenience of inspection and maintenance.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight semi-trailer with a support device, comprising a mounting plate (1), characterized in that: The mounting plate (1) is fixedly connected to the bottom of the mounting plate (1) near the left and right sides, and the first bearing is fixedly connected to the bottom of the mounting plate (2). The two mounting plates (2) are provided with rectangular blocks (3) on adjacent sides, and the two rectangular blocks (3) are connected to a rotating shaft (4). The bottom left side of the mounting plate (2) on the left side is fixedly connected to a dust cover (17). The right end of the rotating shaft (4) passes through the inner cavity of the adjacent first bearing, and the left end of the rotating shaft (4) passes through the adjacent first bearing, extends to the inner cavity of the dust cover (17), and is fixedly connected to a driven bevel gear (5). The top of the driven bevel gear (5) meshes with a transmission bevel gear (19). The transmission bevel gear (19) is fixedly connected to a transmission rod (20) at its top center. A horizontal plate is fixedly connected to the left side of the connecting plate (2) near the bottom, and a second bearing is fixedly connected to the horizontal plate. The top of the transmission rod (20) passes through the inner cavity of the second bearing and is fixedly connected to a square rod (21). A square hole tube (22) matching the top of the square rod (21) is sleeved on the outer side of the top of the square rod (21). A motor housing (6) is fitted to the left side of the connecting plate (2) near the middle position, and a snap-fit ​​mechanism is provided between the motor housing (6) and the connecting plate (2). The bottom of the motor housing (6) is fitted to the top of the dust cover (17). Furthermore, a servo motor (18) is fixedly installed at the top of the inner cavity of the motor housing (6), and an opening is provided at the bottom of the motor housing (6). The power output end of the servo motor (18) is fixedly connected to the top of the square hole round tube (22). The top of the two rectangular blocks (3) is provided with a limiting mechanism, and the bottom of the two rectangular blocks (3) is fixedly connected with a third bearing. The inner cavity of the third bearing is inserted with a movable shaft (7). The bottom ends of the two movable shafts (7) are fixedly connected with hollow cylinders (8). The outer side wall of the hollow cylinder (8) is fitted with a movable ring (11) near the bottom end. The inner side of the movable ring (11) is provided with a lifting mechanism. The left and right sides of the two hollow cylinders (8) are close to Limiting slots are provided at the bottom of each of the two movable rings (11). Three support rods (12) are fixedly connected to the outer walls of each of the two movable rings (11), and a load-bearing plate (13) is fixedly connected to the other end of each of the three support rods (12). The limiting mechanism includes a support plate (15), and the support plate (15) is fitted to the top of the rectangular block (3). A first cylinder (16) is fixedly installed on the connecting plate (2) near the top, and the power end of the first cylinder (16) is fixedly connected to the support plate (15). A slider is fixedly connected to the top of the support plate (15). Slide grooves are provided at the bottom of the mounting plate (1) near the left and right sides, and the slider is movably connected to the inner cavity of the adjacent slide groove.

2. A lightweight semi-trailer with a support device according to claim 1, characterized in that: The locking mechanism includes a locking block (24), which is fixedly connected to the middle position on the right side of the motor housing (6). A locking groove (23) is provided on the left side of the connecting plate (2) on the left side, and a positioning groove (25) is provided at the bottom of the inner cavity of the locking groove (23). The locking block (24) is inserted into the inner cavity of the locking groove (23), and a positioning block (26) is fixedly connected to the bottom of the locking block (24). The positioning block (26) is inserted into the inner cavity of the positioning groove (25).

3. A lightweight semi-trailer with a support device according to claim 2, characterized in that: A fixing block (27) is fixedly connected to the top right side of the motor housing (6), and a cavity is provided on the fixing block (27). A limiting block (28) is attached to the inner cavity of the cavity near the middle position. A plug rod (29) is provided through both the left and right sides of the limiting block (28). A through hole is provided on both the left and right sides of the fixing block (27). A blind hole is provided on the left side of the connecting plate (2) located on the left side near the top. The right end of the plug rod (29) passes through the adjacent through hole and is inserted into the inner cavity of the blind hole. The left end of the plug rod (29) passes through the inner cavity of the adjacent through hole and is hinged with a pull ring (31). A spring (30) is sleeved on the outside of the plug rod (29), and the left and right ends of the spring (30) are fixedly connected to the inner wall of the cavity and the limiting block (28) respectively.

4. A lightweight semi-trailer with a support device according to claim 1, characterized in that: The mounting plate (1) has several threaded holes evenly distributed on its top and bottom.

5. A lightweight semi-trailer with a support device according to claim 1, characterized in that: The lifting mechanism includes a second cylinder (9), and the second cylinder (9) is fixedly installed on the top of the inner cavity of the hollow cylinder (8). The power end of the second cylinder (9) is fixedly connected to a lifting block (10), and sliding blocks are fixedly connected to both the left and right sides of the lifting block (10). The two sliding blocks are respectively connected through the adjacent limiting slotted inner cavity on opposite sides and are fixedly connected to the inner wall of the movable ring (11).

6. A lightweight semi-trailer with a support device according to claim 1, characterized in that: The two hollow cylinders (8) are fixedly connected to a support frame (14) on their adjacent sides, and the support frame (14) is made of manganese steel.

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