A fast soil loading and unloading trolley for tunnel construction
By using cylinder push plates in combination with crawler loading and loading wheel structure on the soil loading and unloading truck, the road surface adaptability and unloading efficiency problems when used in the tunnel are solved, and the effect of rapid unloading and adapting to complex terrain is achieved.
Patent Information
- Application Number
- CN202510043214.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-04-08
AI Technical Summary
When traditional soil loading and unloading trucks are used in tunnels, it is difficult to adapt to the changing pavement environment, resulting in soil spilling and unloading time is too long to quickly complete the unloading task.
A quick soil loading and unloading truck for tunnel construction was designed, using a cylinder and push plate to use it in combination, and the push plate is pushed into the push plate to tilt the soil to improve the unloading speed; at the same time, a crawler and load-bearing wheel structure is used to ensure the smooth driving of the vehicle on roadless ground and adapt to a diverse construction environment.
The combined use of cylinder push plates is significantly accelerated, soil unloading speed is avoided, and working efficiency is improved. The track and load-bearing wheel structures allow the vehicle to drive smoothly in complex terrain and adapt to various complex terrains.
Smart Images

Figure CN119773618A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field related to tunnel construction, and in particular to a fast soil loading and unloading trolley for tunnel construction. Background Art
[0002] Tunnel construction refers to the general term for the construction methods, construction technology and construction management of building tunnels and underground caverns. The tunnel construction process usually includes digging out soil and rocks in the stratum to form a tunnel that meets the designed outline dimensions; carrying out necessary initial support and laying the final permanent lining to control the deformation of the tunnel surrounding rock and ensure the long-term safe use of the tunnel. During the construction of the tunnel, the soil generated in the tunnel needs to be transported using a corresponding trolley. Therefore, there is a special need for a fast soil loading and unloading trolley for tunnel construction.
[0003] The soil loading and unloading trolleys currently on the market have the following problems when in use: 1. When the traditional soil loading and unloading cart is used, it cannot adapt well to the changing road environment in the tunnel when transporting soil in the tunnel, so the soil in the car is spilled. At this time, the relevant staff need to reload the soil, which increases the workload of the relevant staff.
[0004] 2. When most soil loading and unloading carts are used, when the cart reaches the designated location to unload the soil, it can often only unload the soil by tilting the truck bed. The unloading time is too long and the soil in the truck bed cannot be completely unloaded. Summary of the invention
[0005] The present invention aims to solve one of the technical problems in the above-mentioned technology at least to some extent.
[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: A fast soil loading and unloading trolley for tunnel construction, comprising a soil transport vehicle, the outer wall of which is provided with a unloading mechanism; The soil transport vehicle comprises a vehicle body and a hopper, wherein the vehicle body is provided with the hopper.
[0007] Preferably, the unloading mechanism includes a mounting hole, a limiting hole, a cylinder, a push plate and a telescopic rod. The outer wall of the hopper is provided with a mounting hole, the outer wall of the hopper is provided with a limiting hole, a cylinder is installed inside the mounting hole, a push plate is fixed at one end of the cylinder, a telescopic rod is arranged inside the limiting hole, and one end of the telescopic rod is connected to the outer wall of the push plate.
[0008] Preferably, the limiting holes are opened at equal intervals on the outer wall of the hopper, and the outer wall size of the push plate matches the inner wall size of the hopper.
[0009] Preferably, the outer wall size of the telescopic rod matches the inner wall size of the limiting hole, and the telescopic rods are distributed at equal intervals on the outer wall of the push plate.
[0010] Preferably, a transmission mechanism is provided on the outer wall of the earth-moving vehicle, and the transmission mechanism includes a connecting plate, a mounting plate, a transmission wheel, a road wheel and a track. A connecting plate is fixed to the bottom wall of the vehicle body, a mounting plate is fixed to one end of the connecting plate, transmission wheels are provided at both ends of the mounting plate, road wheels are installed on the outer wall of the mounting plate, and a track is sleeved on the outer wall of the transmission wheel.
[0011] Preferably, the road wheels are evenly spaced on the outer wall of the mounting plate, and the mounting plate is symmetrically arranged about the length center axis of the connecting plate.
[0012] Preferably, a buffer mechanism is provided on the outer wall of the earth-moving vehicle, and the buffer mechanism includes a mounting groove, a first connecting block, a connecting rod, a first spring, a mounting block, a limiting rod, a fixed block, a second spring, and an isolation block. The bottom wall of the vehicle body is provided with a mounting groove, the inner wall of the mounting groove is provided with a first connecting block, the outer wall of the first connecting block is installed with a connecting rod, the inner wall of the mounting groove is fixed with a first spring, one end of the first spring is connected to the mounting block, the outer wall of the mounting block is fixed with a limiting rod, one end of the limiting rod is sleeved with a fixed block, the outer wall of the limiting rod is sleeved with a second spring, and one end of the limiting rod is fixed with an isolation block.
[0013] Preferably, one end of the second spring is connected to a fixing block, and the other end of the second spring is connected to an isolation block.
[0014] Preferably, one end of the connecting rod is connected to a first connecting block, and the other end of the connecting rod is connected to a fixing block.
[0015] Preferably, the outer wall of the earth-moving truck is provided with a protective assembly, and the protective assembly includes a second connecting block, a fixing groove, a baffle and an isolation plate. The outer wall of the hopper is installed with a second connecting block, and the outer wall of the second connecting block is provided with a fixing groove. The outer wall of the vehicle body is installed with a baffle, and the vehicle body is provided with an isolation plate through the installation groove.
[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This kind of fast soil loading and unloading trolley for tunnel construction is used in conjunction with a cylinder and a push plate. When the soil transport vehicle is unloading soil, the push plate is pushed by the cylinder to cooperate with the soil transport vehicle to tilt and unload soil, which can speed up the unloading speed of the soil transport vehicle and avoid the soil in the tunnel from remaining in the bucket of the soil transport vehicle, thereby improving work efficiency.
[0017] 2. This kind of fast soil loading and unloading trolley for tunnel construction, through the use of crawler tracks, can ensure the vehicle's passability on roadless ground, reduce driving resistance, and provide a continuous rolling track through the road wheels. At the same time, the crawler tracks have stronger grip and a large contact area with the ground, which can provide greater mechanical traction, so that the soil transport vehicle can adapt to a variety of construction environments. The soil transport vehicle equipped with crawler tracks has good stability during operation, and this stability is mainly due to its unique rolling forward method. This design provides the vehicle with excellent shockproof effect, especially in rugged mountainous areas or transportation occasions requiring shockproof. The soil transport vehicle equipped with crawler tracks is obviously better than the tire soil transport vehicle. This superiority enables the soil transport vehicle equipped with crawler tracks to adapt to various complex terrains.
[0018] 3. The fast soil loading and unloading trolley for tunnel construction has a first spring and a second spring. When the vehicle passes through a road with different height differences, the first spring and the second spring together reduce the pressure on the wheels of the vehicle when the vehicle passes through the uneven road surface, so that the soil in the soil transport vehicle will not spill. When the vehicle travels on a flat road surface, the first spring and the second spring will quickly rebound the installation to the original position. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the structure of the unloading mechanism of the present invention; Figure 3 It is a schematic diagram of the transmission mechanism structure of the present invention; Figure 4 It is a schematic diagram of the structure of the buffer mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the protection component of the present invention.
[0020] In the figure: 1. earth-moving vehicle; 11. vehicle body; 12. hopper; 2. unloading mechanism; 21. mounting hole; 22. limiting hole; 23. cylinder; 24. push plate; 25. telescopic rod; 3. transmission mechanism; 31. connecting plate; 32. mounting plate; 33. transmission wheel; 34. road wheel; 35. crawler track; 4. buffer mechanism; 41. mounting groove; 42. first connecting block; 43. connecting rod; 44. first spring; 45. mounting block; 46. limiting rod; 47. fixing block; 48. second spring; 49. isolation block; 5. protection assembly; 51. second connecting block; 52. fixing groove; 53. baffle; 54. isolation plate. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0022] See also Figure 1-5 , the present invention provides a technical solution: a fast soil loading and unloading trolley for tunnel construction, comprising a soil transport vehicle 1, the outer wall of which is provided with a unloading mechanism 2; The earth-moving vehicle 1 includes a body 11 and a hopper 12. The body 11 is provided with the hopper 12. Through the arrangement of the body 11 and the hopper 12, when in use, when tunnel construction is carried out, the soil generated inside the tunnel due to the construction is loaded into the hopper 12 and then transported by the earth-moving vehicle 1.
[0023] Furthermore, the unloading mechanism 2 includes a mounting hole 21, a limiting hole 22, a cylinder 23, a push plate 24 and a telescopic rod 25. The outer wall of the hopper 12 is provided with a mounting hole 21, and the outer wall of the hopper 12 is provided with a limiting hole 22. The cylinder 23 is installed inside the mounting hole 21, and a push plate 24 is fixed at one end of the cylinder 23. A telescopic rod 25 is arranged inside the limiting hole 22, and one end of the telescopic rod 25 is connected to the outer wall of the push plate 24. Through the arrangement of the mounting hole 21, the limiting hole 22, the cylinder 23, the push plate 24 and the telescopic rod 25, when in use, when the earth-moving vehicle 1 transports the soil in the tunnel to the designated position, the hopper 12 is tilted at this time. Through the tilting of the hopper 12, the soil in the hopper 12 will be dumped out together, and the cylinder 23 is started at the same time. The cylinder 23 pushes the push plate 24 to push the soil in the hopper 12 and the soil attached to the inner wall of the hopper 12, thereby realizing rapid unloading of soil.
[0024] Furthermore, the outer wall of the earth-moving vehicle 1 is provided with a transmission mechanism 3, and the transmission mechanism 3 includes a connecting plate 31, a mounting plate 32, a transmission wheel 33, a road wheel 34 and a track 35. The bottom wall of the vehicle body 11 is fixed with a connecting plate 31, one end of the connecting plate 31 is fixed with a mounting plate 32, both ends of the mounting plate 32 are provided with transmission wheels 33, the outer wall of the mounting plate 32 is provided with a road wheel 34, and the outer wall of the transmission wheel 33 is provided with a track 35. Through the arrangement of the connecting plate 31, the mounting plate 32, the transmission wheel 33, the road wheel 34 and the track 35, when in use, the transmission wheel 33 is installed at both ends of the mounting plate 32, the road wheel 34 is symmetrically installed on the outer wall of the mounting plate 32, and the track 35 is sleeved on the outside of the whole, and then the whole is installed on the bottom wall of the vehicle body 11 through the connecting plate 31. When the earth-moving vehicle 1 is transported inside the tunnel, the crawler track 35 can ensure the vehicle's passability on roadless ground, reduce driving resistance, and provide a continuous rolling track through the road wheels 34. At the same time, the crawler track 35 has a stronger grip and a large contact area with the ground, which can provide greater mechanical traction, so that the earth-moving vehicle 1 can adapt to a variety of construction environments. The earth-moving vehicle 1 equipped with the crawler track 35 has good stability during operation. This stability is mainly due to its unique rolling forward method. This design provides the vehicle with excellent shockproof effect, especially in rugged mountainous areas or transportation occasions requiring shockproof. The earth-moving vehicle 1 equipped with the crawler track 35 is obviously better than the tire earth-moving vehicle 1. This superiority enables the earth-moving vehicle 1 equipped with the crawler track 35 to adapt to various complex terrains.
[0025] Further, the outer wall of the earth moving vehicle 1 is provided with a buffer mechanism 4, and the buffer mechanism 4 includes a mounting groove 41, a first connecting block 42, a connecting rod 43, a first spring 44, a mounting block 45, a limiting rod 46, a fixing block 47, a second spring 48 and an isolation block 49. The bottom wall of the vehicle body 11 is provided with a mounting groove 41, the inner wall of the mounting groove 41 is provided with a first connecting block 42, the outer wall of the first connecting block 42 is provided with a connecting rod 43, the inner wall of the mounting groove 41 is fixed with a first spring 44, one end of the first spring 44 is connected to the mounting block 45, and the mounting block The outer wall of the limit rod 45 is fixed with a limit rod 46, one end of the limit rod 46 is sleeved with a fixing block 47, the outer wall of the limit rod 46 is sleeved with a second spring 48, and one end of the limit rod 46 is fixed with an isolation block 49. Through the arrangement of the mounting groove 41, the first connecting block 42, the connecting rod 43, the first spring 44, the mounting block 45, the limit rod 46, the fixing block 47, the second spring 48 and the isolation block 49, when in use, the first connecting block 42 is symmetrically fixed to the inner wall of the mounting groove 41 by bolts, and then the fixing block 47 is connected to the first connecting block through the connecting rod 43. The first spring 44 is installed in the installation groove 41, and the installation block 45 is fixed to the other end of the first spring 44. The second spring 48 is sleeved on the outside of the limit rod 46. When the earth moving vehicle 1 is transported in the tunnel, it will face different road surfaces in the tunnel. At this time, when the vehicle passes through a road surface with different height differences, the wheel presses the first spring 44 upward through the installation block 45. At this time, the installation block 45 will move upward with the limit rod 46. As the limit rod 4 moves upward, the connecting rod 43 will push the fixing block 47. The second spring 48 is installed in the middle of the fixed block 47 and the isolation block 49. At this time, the fixed block 47 and the isolation block 49 will squeeze the second spring 48 together. Then, the second spring 48 symmetrically arranged on both sides of the isolation block 49 will work together with the first spring 44 to reduce the pressure on the wheels of the vehicle when the vehicle passes through the uneven road surface, so that the soil in the earth-moving vehicle 1 will not be spilled. As the vehicle travels on a flat road, the first spring 44 and the second spring 48 will rebound the installation unit 45 to its original position.
[0026] Furthermore, the outer wall of the earth-moving vehicle 1 is provided with a protective component 5, which includes a second connecting block 51, a fixing groove 52, a baffle 53 and an isolation plate 54. The outer wall of the hopper 12 is installed with the second connecting block 51, and the outer wall of the second connecting block 51 is provided with a fixing groove 52. The outer wall of the body 11 is installed with a baffle 53, and the body 11 is provided with an isolation plate 54 through the installation groove 41. Through the arrangement of the second connecting block 51, the fixing groove 52, the baffle 53 and the isolation plate 54, when in use, the second connecting block 51 is installed on the outer wall of the hopper 12, and the cylinder 23 is placed in the fixing groove 52. When the earth-moving vehicle 1 needs to be transported inside the tunnel, the second connecting block 51 can prevent the soil from falling into the vicinity of the cylinder 23 when loading the soil, thereby preventing the cylinder 23 from being damaged.
[0027] Furthermore, the road wheels 34 are evenly spaced on the outer wall of the mounting plate 32 , and the mounting plate 32 is symmetrically arranged with respect to the length center axis of the connecting plate 31 . Through the arrangement of the connecting plate 31 , when in use, the whole is mounted on the bottom wall of the vehicle body 11 through the connecting plate 31 .
[0028] Furthermore, the limiting holes 22 are opened at equal intervals on the outer wall of the hopper 12, and the outer wall size of the push plate 24 matches the inner wall size of the hopper 12. Through the setting of the push plate 24, when in use, the push plate 24 will quickly push out the soil in the hopper 12, and at the same time push out the soil attached to the inner wall of the hopper 12.
[0029] Furthermore, the outer wall size of the telescopic rod 25 matches the inner wall size of the limiting hole 22, and the telescopic rods 25 are evenly spaced on the outer wall of the push plate 24. Through the setting of the telescopic rod 25, when in use, the telescopic rod 25 will extend out together with the push plate 24, so that the push plate 24 can maintain horizontal movement.
[0030] Furthermore, one end of the second spring 48 is connected to a fixed block 47, and the other end of the second spring 48 is connected to an isolation block 49. Through the setting of the second spring 48, when in use, as the terrain changes when the earth-moving vehicle 1 moves, the second spring 48 can effectively cushion the whole, so that the soil in the earth-moving vehicle 1 will not spill.
[0031] Furthermore, one end of the connecting rod 43 is connected to the first connecting block 42, and the other end of the connecting rod 43 is connected to the fixing block 47. Through the setting of the connecting rod 43, when in use, the connecting rod 43 drives the fixing block 47 to squeeze the second spring 48 to buffer the whole.
[0032] Working principle: When in use, the transmission wheels 33 are installed at both ends of the mounting plate 32, the road wheels 34 are symmetrically installed on the outer wall of the mounting plate 32, and the track 35 is sleeved on the outside of the whole, and then the whole is installed on the bottom wall of the vehicle body 11 through the connecting plate 31. When the earth-moving vehicle 1 is transported inside the tunnel, the track 35 can ensure the passability of the vehicle on the roadless ground, reduce the driving resistance, and provide a continuous rolling track through the road wheels 34. At the same time, the track 35 has a stronger grip and a large contact area with the ground, which can provide greater mechanical traction, so that the earth-moving vehicle 1 can adapt to a variety of construction environments. The earth-moving vehicle 1 equipped with the track 35 has good stability during operation, and this stability is mainly due to Due to its unique rolling forward mode, this design provides excellent shockproof effect for the vehicle, especially in rugged mountainous areas or transportation occasions requiring shockproof, the earth-moving vehicle 1 equipped with the crawler 35 is obviously better than the tire earth-moving vehicle 1. This superiority enables the earth-moving vehicle 1 equipped with the crawler 35 to adapt to various complex terrains. The first connecting block 42 is symmetrically fixed to the inner wall of the mounting groove 41 by bolts, and then the fixing block 47 is connected to the first connecting block 42 by the connecting rod 43, the first connecting block 42 is symmetrically fixed to the inner wall of the mounting groove 41 by bolts, and then the fixing block 47 is connected to the first connecting block 42 by the connecting rod 43, the first spring 44 is installed in the interior of the mounting groove 41, and the mounting block 45 is fixed in At the other end of the first spring 44, the second spring 48 is sleeved on the outside of the limit rod 46. When the earth moving vehicle 1 is transported inside the tunnel, it will face different road surfaces in the tunnel. At this time, when the vehicle passes through a road surface with different height differences, the wheel presses the first spring 44 upward through the mounting block 45. At this time, the mounting block 45 will move upward with the limit rod 46. As the limit rod 4 moves upward, the connecting rod 43 will push the fixed block 47 to move in the direction of the isolation block 49, and the second spring 48 is installed in the middle of the fixed block 47 and the isolation block 49. At this time, the fixed block 47 and the isolation block 49 will squeeze the second spring 48 together, and then the second spring 48 symmetrically arranged on both sides of the isolation block 49 will relieve the first spring 44 together. When the vehicle passes through a high and low road surface, the pressure brought by the vehicle to the wheels prevents the soil in the soil-carrying vehicle 1 from spilling. As the vehicle travels on a flat road surface, the first spring 44 and the second spring 48 will rebound the mounting block 45 to its original position, install the second connecting block 51 on the outer wall of the hopper 12, and place the cylinder 23 in the fixed groove 52. When the soil-carrying vehicle 1 needs to be transported inside the tunnel, the second connecting block 51 can prevent the soil from falling into the vicinity of the cylinder 23 during loading, thereby damaging the cylinder 23. When the soil-carrying vehicle 1 transports the soil in the tunnel to the designated position, the hopper 12 is tilted at this time. Through the tilting of the hopper 12, the soil in the hopper 12 will be dumped out together, and the cylinder 23 is started at the same time.The cylinder 23 pushes the push plate 24 to push out the soil in the hopper 12 and the soil attached to the inner wall of the hopper 12, thereby realizing rapid soil unloading.
[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fast soil loading and unloading vehicle for tunnel construction, comprising a soil transport vehicle (1), characterized in that: The outer wall of the soil transport vehicle (1) is provided with a discharge mechanism (2); The soil transport vehicle (1) comprises a vehicle body (11) and a hopper (12), wherein the vehicle body (11) is provided with the hopper (12).
2. A fast soil loading and unloading trolley for tunnel construction according to claim 1, characterized in that: The unloading mechanism (2) comprises a mounting hole (21), a limiting hole (22), a cylinder (23), a push plate (24) and a telescopic rod (25); the outer wall of the hopper (12) is provided with a mounting hole (21); the outer wall of the hopper (12) is provided with a limiting hole (22); the cylinder (23) is installed inside the mounting hole (21); the push plate (24) is fixed to one end of the cylinder (23); the telescopic rod (25) is arranged inside the limiting hole (22); and one end of the telescopic rod (25) is connected to the outer wall of the push plate (24).
3. A fast soil loading and unloading trolley for tunnel construction according to claim 2, characterized in that: The limiting holes (22) are formed at equal intervals on the outer wall of the hopper (12), and the outer wall size of the push plate (24) matches the inner wall size of the hopper (12).
4. A fast soil loading and unloading trolley for tunnel construction according to claim 2, characterized in that: The outer wall size of the telescopic rod (25) matches the inner wall size of the limiting hole (22), and the telescopic rods (25) are distributed at equal intervals on the outer wall of the push plate (24).
5. The fast soil loading and unloading trolley for tunnel construction according to claim 1, characterized in that: The outer wall of the earth-moving vehicle (1) is provided with a transmission mechanism (3), the transmission mechanism (3) comprising a connecting plate (31), a mounting plate (32), a transmission wheel (33), a road wheel (34) and a crawler track (35); the bottom wall of the vehicle body (11) is fixed with a connecting plate (31), one end of the connecting plate (31) is fixed with a mounting plate (32), both ends of the mounting plate (32) are provided with transmission wheels (33), the outer wall of the mounting plate (32) is provided with a road wheel (34), and the outer wall of the transmission wheel (33) is provided with a crawler track (35).
6. A fast soil loading and unloading trolley for tunnel construction according to claim 5, characterized in that: The road wheels (34) are distributed at equal intervals on the outer wall of the mounting plate (32), and the mounting plate (32) is symmetrically arranged about the longitudinal center axis of the connecting plate (31).
7. The fast soil loading and unloading trolley for tunnel construction according to claim 1, characterized in that: The outer wall of the earth moving vehicle (1) is provided with a buffer mechanism (4), and the buffer mechanism (4) comprises a mounting groove (41), a first connecting block (42), a connecting rod (43), a first spring (44), a mounting block (45), a limiting rod (46), a fixing block (47), a second spring (48), and an isolating block (49). The bottom wall of the vehicle body (11) is provided with a mounting groove (41), the inner wall of the mounting groove (41) is provided with a first connecting block (42), the outer wall of the first connecting block (42) is provided with a connecting rod (43), the inner wall of the mounting groove (41) is fixed with a first spring (44), one end of the first spring (44) is connected to the mounting block (45), the outer wall of the mounting block (45) is fixed with a limiting rod (46), one end of the limiting rod (46) is sleeved with a fixing block (47), the outer wall of the limiting rod (46) is sleeved with a second spring (48), and one end of the limiting rod (46) is fixed with an isolating block (49).
8. A fast soil loading and unloading trolley for tunnel construction according to claim 7, characterized in that: One end of the second spring (48) is connected to a fixing block (47), and the other end of the second spring (48) is connected to an isolation block (49).
9. A fast soil loading and unloading trolley for tunnel construction according to claim 7, characterized in that: One end of the connecting rod (43) is connected to the first connecting block (42), and the other end of the connecting rod (43) is connected to the fixing block (47).
10. The fast soil loading and unloading trolley for tunnel construction according to claim 1, characterized in that: The outer wall of the earth moving vehicle (1) is provided with a protection assembly (5), the protection assembly (5) comprising a second connection block (51), a fixing groove (52), a baffle (53) and an isolation plate (54); the outer wall of the hopper (12) is provided with a second connection block (51), the outer wall of the second connection block (51) is provided with a fixing groove (52); the outer wall of the vehicle body (11) is provided with a baffle (53), and the vehicle body (11) is provided with an isolation plate (54) via the installation groove (41).