A set of truck-mounted underhung diesel generator

Abstract

The present application relates to diesel generator technical field, especially to a kind of set truck with lower hanging type diesel generating set, including semitrailer framework and generator set body, installation reinforcing mechanism and buffer protection mechanism are provided between the semitrailer framework and generator set body, blocking protection mechanism is provided on the generator set body;The installation reinforcing mechanism includes L-shaped plate A and L-shaped plate B, the L-shaped plate A and L-shaped plate B are all provided with two, two groups of the L-shaped plate A and L-shaped plate B are mutually close one end and are all fixedly connected with limiting block, the limiting block is hung on semitrailer framework, and the lower of two groups of the L-shaped plate A and L-shaped plate B is mutually close one end and is all opened with circular groove corresponding limiting block;The L-shaped plate of two sides is moved to inboard by winding steel wire rope, L-shaped plate can be tightly clamped on framework, to avoid generator set drop in the process of driving, guarantee driving safety.

Description

Technical Field

[0001] This invention relates to the field of diesel generator technology, and more particularly to an undermount diesel generator set for container trucks. Background Technology

[0002] Container refrigeration units, also known as refrigeration units or chillers, are integrated temperature control devices fixedly installed at the end of insulated refrigerated containers. Driven by electricity and operating according to a vapor compression refrigeration cycle, they regulate the temperature inside the container, ensuring the quality of temperature-controlled goods during storage and transportation. Currently, the operating power of container refrigeration units is mainly supplied by diesel generator sets. These generator sets use a diesel engine as the prime mover to drive a synchronous generator, converting the mechanical energy released from diesel combustion into electrical energy. The entire unit is mounted on a semi-trailer frame. However, diesel combustion emits carbon dioxide and various pollutants, resulting in high carbon emissions and large pollutant emissions. Therefore, current technology uses biodiesel as an alternative fuel.

[0003] In existing technology, when installing a diesel generator set on a semi-trailer frame, a lifting tool is needed to support the generator set and raise it to a position where it contacts the frame. At this point, the two iron plates on the generator set are located on the upper and lower sides of the frame, respectively. Then, the bolts are tightened with tools to complete the installation. However, the installation requires contact with the tools, making it difficult to complete quickly and resulting in low installation efficiency. Furthermore, the semi-trailer vibrates during operation, which can cause the bolts to loosen and fall off, causing the upper iron plates to detach from the frame and the generator set to fall, affecting driving safety. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing an undermount diesel generator set for container trucks.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a semi-trailer-mounted diesel generator set for container trucks, comprising a semi-trailer frame and a generator set body, wherein an installation and reinforcement mechanism and a buffer protection mechanism are provided between the semi-trailer frame and the generator set body, and a blocking protection mechanism is provided on the generator set body. The installation and reinforcement mechanism includes two L-shaped plates A and B. Each set of L-shaped plates A and B has two corresponding limit blocks fixedly connected to one end of each set of L-shaped plates A and B. The limit blocks are hung on the semi-trailer frame. Circular grooves are provided below the limit blocks at the ends of the L-shaped plates A and B. Fixed cones are fixedly connected inside the circular grooves. The tips of the fixed cones are inserted into the outer side of the generator set body for installation. The L-shaped plates A and B are reinforced when they move slightly inward. The buffer protection mechanism is used to protect the generator set body.

[0006] Preferably, each of the two L-shaped plates A has a side plate symmetrically fixedly connected to one end, and a rotating shaft is rotatably connected between the two sets of side plates. A winding drum is fixedly connected to the outer wall of each of the two rotating shafts, and a steel wire rope is wound around the outer wall of each of the two winding drums. The two steel wire ropes are fixedly connected to the two L-shaped plates B respectively, and the two steel wire ropes pass through the two L-shaped plates A respectively. A tightening member is fixedly connected to one end of each of the two rotating shafts, and a ratchet is fixedly connected to one end of each of the two rotating shafts. A pawl is rotatably connected to one end of each of the outer steel wire ropes, and the two pawls are respectively engaged in the grooves of the ratchet.

[0007] Preferably, the installation and reinforcement mechanism further includes square blocks, each square block having a trapezoidal groove symmetrically opened at its top, each set of trapezoidal grooves having a trapezoidal block slidably disposed on its inner wall, and each set of trapezoidal blocks and trapezoidal grooves being fixedly connected to a second spring, and each set of trapezoidal blocks being fixedly connected to each L-shaped plate A and L-shaped plate B respectively.

[0008] Preferably, the buffer protection mechanism includes fixed plates symmetrically fixedly connected to both ends of the generator set body, with a circular column slidingly penetrating through the four corners of the top of each fixed plate, and each group of circular columns and each square block being fixedly connected respectively, and a limit plate being fixedly connected to the bottom of each group of circular columns.

[0009] Preferably, a third spring is fixedly connected to the outer side of the circular column corresponding to the top of each fixed plate, and each group of third springs is fixedly connected to each square block. Shock absorbers are symmetrically fixedly connected between the fixed plate and the square block.

[0010] Preferably, the blocking and protection mechanism includes a fixed block fixedly connected to one end of the outer side of the square block, and telescopic columns A and B are slidably passed through the fixed blocks on both sides respectively. A fixed cylinder is slidably connected to the bottom of the outer wall of the telescopic column B. A protective plate is fixedly connected to the bottom of the telescopic column A and the fixed cylinder. A plurality of spherical grooves are opened at the bottom of the protective plate, and each spherical groove is provided with a ball bearing on its inner wall.

[0011] Preferably, a fixed disc is fixedly connected to the top of both telescopic column A and telescopic column B, and a fixed ring is fixedly connected to the lower part of the outer wall of both telescopic column A and telescopic column B corresponding to the fixed block. A first spring is fixedly connected to the top of each fixed ring, and each first spring is fixedly connected to each fixed block.

[0012] Preferably, the blocking and protection mechanism further includes extrusion grooves on both sides of the right end of the protective plate, extrusion columns are slidably arranged on the inner walls of the two extrusion grooves, inclined plates are fixedly connected to the right ends of the two extrusion columns, and fourth springs are fixedly connected to the left ends of the two extrusion columns. The two fourth springs and the two extrusion grooves are respectively fixedly connected.

[0013] Preferably, the left side of the inner wall of each of the two extrusion grooves is connected to a piston groove, the inner wall of each of the two piston grooves is slidably provided with a piston plate, the right end of each of the two piston plates is fixedly connected with a push rod, and the two push rods are fixedly connected to the two extrusion columns respectively. The inner wall of each of the two piston grooves is fixedly penetrated by a fixed tube, and the two fixed tubes are fixedly connected to the two fixed cylinders respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the installation and reinforcement mechanism, the generator set can be quickly clamped onto the frame by the limit block and L-shaped plate without the aid of any tools, thus improving installation efficiency. Then, by winding the steel wire rope, the L-shaped plates on both sides are moved inward. Since there are fixed cones on the L-shaped plates, the L-shaped plates can be tightly clamped onto the frame, thereby preventing the generator set from falling off during driving and ensuring driving safety. 2. Through the buffer protection mechanism, the generator set can be buffered and damped during operation by the third spring and shock absorber to prevent vibration from damaging the internal components of the generator set, thereby extending the service life of the generator set. 3. The blocking and protection mechanism can guide the obstruction of protruding debris during operation. At the same time, the obstruction moves backward and compresses the fourth spring for buffer protection. Then, the piston plate pushes the hydraulic oil in the piston groove and flows into the fixed cylinder through the fixed pipe. The protective plate moves upward and squeezes the hydraulic oil through the telescopic column B. Therefore, the obstruction can be retracted and protected by the hydraulic oil. When the protruding debris slides under the protective plate, it will move upward as a whole. At this time, with the cooperation of the first spring, the protective plate will extend and retract, thus protecting the generator set from being scratched by the protruding debris. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the generator set body of an undermount diesel generator set for container trucks according to the present invention; Figure 2 This is a schematic diagram of the overall structure of an undermount diesel generator set for container trucks according to the present invention; Figure 3 This is a side view of an under-mounted diesel generator set for container trucks according to the present invention; Figure 4 This is a top view of the generator set body of an undermount diesel generator set for container trucks according to the present invention; Figure 5 This invention relates to an under-mounted diesel generator set for container trucks. Figure 3 Enlarged view of the structure at point A in the middle; Figure 6This invention relates to an under-mounted diesel generator set for container trucks. Figure 4 Enlarged view of the structure at point B in the middle; Figure 7 This is a vertical sectional view of a square block of an under-mounted diesel generator set for container trucks according to the present invention; Figure 8 This is a cross-sectional view of the L-shaped plate A of the under-mounted diesel generator set for container trucks according to the present invention; Figure 9 This is a partial sectional view of the protective plate of an under-mounted diesel generator set for container trucks according to the present invention; Figure 10 This is a structural diagram of the protective plate of an under-mounted diesel generator set for container trucks according to the present invention.

[0016] In the diagram: 1. Semi-trailer frame; 2. Generator set body; 3. L-shaped plate A; 4. Telescopic column A; 5. Protective plate; 6. Telescopic column B; 7. Fixing cylinder; 8. Angled plate; 9. Square block; 10. L-shaped plate B; 11. Limiting block; 12. Fixing pipe; 13. Wire rope; 14. Tensioning component; 15. Winding drum; 16. Side plate; 17. Fixing plate; 18. Fixing ring; 19. First spring; 20. Fixing block; 21. 1. Fixed disc; 22. Pawl; 23. Ratchet; 24. Shaft; 25. Second spring; 26. Trapezoidal groove; 27. Trapezoidal block; 28. Circular column; 29. ​​Limiting disc; 30. Shock absorber; 31. Third spring; 32. Circular groove; 33. Fixed cone; 34. Extrusion column; 35. Fourth spring; 36. Push rod; 37. Piston groove; 38. Piston plate; 39. Extrusion groove; 40. Spherical groove; 41. Ball bearing. Detailed Implementation

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] like Figures 1-10The diagram shows an under-mounted diesel generator set for a semi-trailer truck, comprising a semi-trailer frame 1 and a generator set body 2. A mounting and reinforcing mechanism and a buffer protection mechanism are provided between the semi-trailer frame 1 and the generator set body 2. A blocking protection mechanism is provided on the generator set body 2. The mounting and reinforcing mechanism includes two L-shaped plates A3 and B10. Each set of L-shaped plates A3 and B10 has a limiting block 11 fixedly connected to one end close to the other. The limiting block 11 is hung on the semi-trailer frame 1. A circular groove 32 is provided below the limiting block 11 at the end of each set of L-shaped plates A3 and B10 close to the other. A fixing cone 33 is fixedly connected inside each set of circular grooves 32. The tip of the fixing cone 33 is inserted into the outer side of the generator set body 2 for installation. The L-shaped plates A3 and B10 are reinforced when slightly moved inward. The buffer protection mechanism is used to protect the generator set body 2.

[0019] like Figure 5 , Figure 6 As shown, side plates 16 are symmetrically fixedly connected to one end of each of the two L-shaped plates A3. A rotating shaft 24 is rotatably connected between the two sets of side plates 16. A winding drum 15 is fixedly connected to the outer wall of each of the two rotating shafts 24. A steel wire rope 13 is wound around the outer wall of each of the two winding drums 15. The two steel wire ropes 13 are fixedly connected to the two L-shaped plates B10 respectively. The two steel wire ropes 13 pass through the two L-shaped plates A3 respectively. A tightening member 14 is fixedly connected to one end of each of the two rotating shafts 24. A ratchet 23 is fixedly connected to one end of each of the two rotating shafts 24. A pawl 22 is rotatably connected to one end of each of the outer steel wire ropes 13. The two pawls 22 are respectively locked in the grooves of the ratchet 23. The operator can rotate the tightening component 14 to drive the rotating shaft 24 and the winding drum 15 to rotate synchronously, thereby winding and tightening the wire rope 13 and driving the L-shaped plates A3 and B10 to move closer to each other, thus installing the generator set body 2 on the semi-trailer frame 1. After tightening, the pawl 22 and the ratchet 23 lock together to prevent the wire rope 13 from loosening due to vehicle bumps and vibrations. The diesel generator set can be replaced with a new energy internal combustion engine generator set to reduce pollution.

[0020] like Figure 5 , Figure 7 , Figure 8As shown, the installation and reinforcement mechanism also includes square blocks 9, each square block 9 having a trapezoidal groove 26 symmetrically opened at its top. Trapezoidal blocks 27 are slidably arranged on the inner wall of each set of trapezoidal grooves 26, and a second spring 25 is fixedly connected between each set of trapezoidal blocks 27 and the trapezoidal grooves 26. Each set of trapezoidal blocks 27 is fixedly connected to each L-shaped plate A3 and L-shaped plate B10 respectively. During the process of hoisting the generator set body 2 onto the semi-trailer frame 1, the limiting block 11 is squeezed by the frame, causing the L-shaped plates A3 and B10 to move outwards, and the second spring 25 is compressed and contracts. When the limiting block 11 passes the semi-trailer frame 1, the second spring 25 rebounds and resets, pushing the limiting block 11 to engage with the hook on the semi-trailer frame 1, quickly completing the installation of the generator set body 2.

[0021] like Figure 5 , Figure 7 As shown, the buffer protection mechanism includes fixed plates 17 symmetrically fixedly connected to both ends of the generator body 2. Each fixed plate 17 has a circular column 28 slidingly penetrating through the four corners of its top end. Each set of circular columns 28 is fixedly connected to each square block 9. Each set of circular columns 28 is fixedly connected to the bottom end of a limit plate 29. Each fixed plate 17 has a third spring 31 fixedly connected to the outer side of the circular column 28. Each set of third springs 31 is fixedly connected to each square block 9. A shock absorber 30 is symmetrically fixedly connected between the fixed plate 17 and the square block 9. During the bumpy ride of the trailer, the generator set body 2, together with the new energy internal combustion engine installed inside it, vibrates up and down. The fixing plate 17 slides along the axial direction of the circular column 28 with the generator set body 2. The third spring 31 and the shock absorber 30 work together to absorb and dissipate the vibration impact energy transmitted from the vehicle and reduce the vibration amplitude. When the diesel generator set is replaced with the new energy internal combustion engine generator set, the vibration will damage the internal combustion components and electronic control components. Therefore, buffering can extend the overall service life of the new energy internal combustion engine generator set.

[0022] like Figure 3 , Figure 4 , Figure 10 As shown, the blocking and protection mechanism includes a fixed block 20 fixedly connected to one end of the outer side of the square block 9. Telescopic columns A4 and B6 slide through the fixed blocks 20 on both sides respectively. A fixed cylinder 7 is slidably connected to the bottom of the outer wall of the telescopic column B6. A protective plate 5 is fixedly connected to the bottom of the telescopic column A4 and the fixed cylinder 7. Multiple spherical grooves 40 are formed at the bottom of the protective plate 5, and each spherical groove 40 has a ball bearing 41 on its inner wall. The protective plate 5 is located on the lower side of the generator set body 2, providing physical protection to the bottom of the generator set body 2. When protruding debris approaches the protective plate 5 during vehicle operation, the protective plate 5 can prevent the hard object from directly impacting the generator set housing. The ball bearings 41 at the bottom can convert the hard impact of the hard object into rolling friction, reducing the scraping resistance between the hard object and the protective plate 5 and lowering the bottom impact load.

[0023] like Figure 3 , Figure 4 , Figure 5 As shown, a fixed disc 21 is fixedly connected to the top of both telescopic columns A4 and B6. A fixed ring 18 is fixedly connected to the lower part of the fixed block 20 on the outer wall of both telescopic columns A4 and B6. A first spring 19 is fixedly connected to the top of each fixed ring 18, and each first spring 19 is fixedly connected to each fixed block 20. When the protective plate 5 is subjected to an impact force from below, telescopic columns A4 and B6 slide upwards, and the fixed ring 18 moves upwards accordingly, compressing the first spring 19. The first spring 19 absorbs the vertical impact energy through elastic deformation, achieving vertical buffering and force relief of the protective plate 5, preventing the impact load from being transmitted upwards to the generator body 2.

[0024] like Figure 9 As shown, the blocking and protection mechanism also includes compression grooves 39 on both sides of the right end of the protective plate 5. Compression columns 34 are slidably installed on the inner walls of both compression grooves 39. An inclined plate 8 is fixedly connected to the right end of each of the two compression columns 34, and a fourth spring 35 is fixedly connected to the left end of each of the two compression columns 34. The two fourth springs 35 and the two compression grooves 39 are respectively fixedly connected. During operation, protruding debris first contacts the inclined surface of the inclined plate 8. The protruding debris pushes the inclined plate 8 and the compression columns 34 back into the compression grooves 39. The fourth springs 35 are compressed and contracted, achieving initial horizontal buffering through the elastic deformation of the fourth springs 35, thereby reducing the lateral impact force of the protruding debris on the protective plate 5 and the generator set body 2.

[0025] like Figure 9 As shown, the left side of the inner wall of each of the two extrusion grooves 39 is connected to a piston groove 37. A piston plate 38 is slidably mounted on the inner wall of each of the two piston grooves 37. A push rod 36 is fixedly connected to the right end of each of the two piston plates 38. The two push rods 36 are fixedly connected to the two extrusion columns 34. A fixed pipe 12 is fixedly passed through the inner wall of each of the two piston grooves 37. The two fixed pipes 12 are fixedly connected to the two fixed cylinders 7. When the inclined plate 8 retracts upon impact, the extrusion column 34 drives the piston plate 38 to slide to the left inside the piston groove 37 via the push rod 36. The hydraulic oil stored inside the piston groove 37 is pressed into the inner cavity of the fixed cylinder 7 via the fixed pipe 12, forcing the telescopic column B6 to rise relative to the fixed cylinder 7. This converts the horizontal impact force from the obstacle into a vertical buffer stroke, improving the buffering and protection effect.

[0026] Working principle: First, lift the generator set body 2 so that the inclined surface of the limiting block 11 contacts the bottom sides of the semi-trailer frame 1. Then, as it is lifted upwards, the limiting block 11 moves outwards through compression, and the trapezoidal block 27 moves outwards along with it, thus compressing the second spring 25. When the L-shaped plate A3 and L-shaped plate B10 contact the bottom of the semi-trailer frame 1, the elastic restoring action of the second spring 25 causes the trapezoidal block 27 to move inwards, thereby locking the limiting block 11 above the installation position of the semi-trailer frame 1. This quickly completes the installation operation, improving installation efficiency. The rear rotating tightening member 14 rotates synchronously with the rotating shaft 24 and ratchet 23. The rotating shaft 24 rotates with the winding drum 15 and winds up and tightens the wire rope 13, thereby moving the L-shaped plate A3 and L-shaped plate B10 inward and inserting the fixing cone 33 into both sides of the generator body 2. After tightening, the pawl 22 is locked in the groove of the ratchet 23 to limit the ratchet 23, thereby preventing the wire rope 13 from loosening and completing the reinforcement of the L-shaped plate A3 and L-shaped plate B10, ensuring the installation effect, preventing the situation of falling off during use, and ensuring driving safety. During operation, vibrations will occur. Since the generator set body 2 and the fixed plate 17 are fixedly connected, they will sway up and down synchronously. The damper 30 and the third spring 31 will buffer the generator set body 2, preventing excessive swaying and damage to the electronic components inside, thus extending its service life. Furthermore, when the semi-trailer frame 1 encounters protruding debris during operation, the debris will first contact the inclined surface of the inclined plate 8, causing it to move backward. The presence of the fourth spring 35 further mitigates this. The inclined plate 8 is in a telescopic state to avoid damage from direct collision. The extrusion column 34 pushes the push rod 36 and piston plate 38 to move, thereby pressing the hydraulic oil in the piston groove 37 into the fixed cylinder 7 through the fixed pipe 12. When the protruding debris slides to the bottom of the protective plate 5, it moves upward, which moves the fixed cylinder 7 upward and squeezes the hydraulic oil in the fixed cylinder 7. This can achieve buffer protection in both horizontal and vertical directions. At the same time, it provides buffer protection with the cooperation of the first spring 19 to prevent the generator set body 2 from being scratched by the protruding debris and extend its service life.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A semi-trailer-mounted diesel generator set for container trucks, comprising a semi-trailer frame (1) and a generator set body (2), characterized in that: An installation and reinforcement mechanism and a buffer protection mechanism are provided between the semi-trailer frame (1) and the generator set body (2), and a blocking protection mechanism is provided on the generator set body (2); The installation and reinforcement mechanism includes L-shaped plate A (3) and L-shaped plate B (10). There are two L-shaped plates A (3) and L-shaped plate B (10). Limiting blocks (11) are fixedly connected to one end of each set of L-shaped plates A (3) and L-shaped plates B (10). The limiting blocks (11) are hung on the semi-trailer frame (1). Circular grooves (32) are opened below the corresponding limiting blocks (11) at the one end of each set of L-shaped plates A (3) and L-shaped plates B (10). Fixing cones (33) are fixedly connected inside the two sets of circular grooves (32). The tip of the fixing cone (33) is inserted into one end of the generator body (2) to complete the installation. When the L-shaped plates A (3) and L-shaped plates B (10) move slightly inward, they are reinforced. The buffer protection mechanism is used to protect the generator body (2).

2. The under-mounted diesel generator set for container trucks according to claim 1, characterized in that: Two L-shaped plates A (3) are symmetrically fixedly connected to one end of each side plate (16). Two sets of side plates (16) are rotatably connected to a rotating shaft (24). Two rotating shafts (24) are fixedly connected to the outer walls of each other. Two rotating shafts (24) are wound with steel wire ropes (13) on their outer walls. Two steel wire ropes (13) are fixedly connected to two L-shaped plates B (10). Two steel wire ropes (13) pass through two L-shaped plates A (3). One end of the inner side of each rotating shaft (24) is fixedly connected to a tightening member (14). One end of the outer side of each rotating shaft (24) is fixedly connected to a ratchet (23). One end of the outer steel wire rope (13) is rotatably connected to a pawl (22). Two pawls (22) are respectively locked in the grooves of the ratchet (23).

3. The under-mounted diesel generator set for container trucks according to claim 1, characterized in that: The installation and reinforcement mechanism also includes square blocks (9), each square block (9) has a trapezoidal groove (26) symmetrically opened at the top, and a trapezoidal block (27) is slidably arranged on the inner wall of each group of trapezoidal grooves (26). A second spring (25) is fixedly connected between each group of trapezoidal blocks (27) and trapezoidal grooves (26). Each group of trapezoidal blocks (27) is fixedly connected to each L-shaped plate A (3) and L-shaped plate B (10).

4. A type of under-mounted diesel generator set for container trucks according to claim 3, characterized in that: The buffer protection mechanism includes fixed plates (17) symmetrically fixedly connected to both ends of the generator body (2). Each fixed plate (17) has a circular column (28) slidingly passing through the top four corners. Each set of circular columns (28) and each square block (9) are fixedly connected. Each set of circular columns (28) has a limit plate (29) fixedly connected to the bottom end.

5. A type of under-mounted diesel generator set for container trucks according to claim 4, characterized in that: Each of the fixed plates (17) has a third spring (31) fixedly connected to the outer side of the circular column (28) at the top, and each set of the third springs (31) and each square block (9) are fixedly connected respectively. The fixed plates (17) and the square blocks (9) are symmetrically fixedly connected with shock absorbers (30).

6. A type of under-mounted diesel generator set for container trucks according to claim 3, characterized in that: The blocking and protection mechanism includes a fixed block (20) fixedly connected to one end of the outer side of the square block (9). The two fixed blocks (20) are respectively slidably connected to telescopic columns A (4) and B (6). A fixed cylinder (7) is slidably connected to the bottom of the outer wall of the telescopic column B (6). A protective plate (5) is fixedly connected to the bottom of the telescopic column A (4) and the fixed cylinder (7). A plurality of spherical grooves (40) are opened at the bottom of the protective plate (5). A ball bearing (41) is provided on the inner wall of each spherical groove (40).

7. A type of under-mounted diesel generator set for container trucks according to claim 6, characterized in that: The top ends of telescopic column A (4) and telescopic column B (6) are fixedly connected to a fixed disc (21). The outer walls of telescopic column A (4) and telescopic column B (6) are fixedly connected to the bottom of the corresponding fixed block (20). The top end of each fixed ring (18) is fixedly connected to a first spring (19), and each first spring (19) is fixedly connected to each fixed block (20).

8. A type of under-mounted diesel generator set for container trucks according to claim 6, characterized in that: The blocking and protection mechanism also includes extrusion grooves (39) on both sides of the right end of the protective plate (5). Extrusion columns (34) are slidably arranged on the inner walls of the two extrusion grooves (39). An inclined plate (8) is fixedly connected to the right end of the two extrusion columns (34). A fourth spring (35) is fixedly connected to the left end of the two extrusion columns (34). The two fourth springs (35) and the two extrusion grooves (39) are fixedly connected respectively.

9. A type of under-mounted diesel generator set for container trucks according to claim 8, characterized in that: The left side of the inner wall of each of the two extrusion grooves (39) is connected to a piston groove (37). The inner wall of each of the two piston grooves (37) is slidably provided with a piston plate (38). The right end of each of the two piston plates (38) is fixedly connected with a push rod (36). The two push rods (36) and the two extrusion columns (34) are fixedly connected respectively. The inner wall of each of the two piston grooves (37) is fixedly penetrated by a fixed tube (12). The two fixed tubes (12) and the two fixed cylinders (7) are fixedly connected respectively.

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