Multifunctional road and bridge maintenance vehicle

Abstract

The invention relates to the technical field of road bridge maintenance, in particular to a multifunctional road bridge maintenance vehicle which comprises a mobile control device and a protective shell arranged on the mobile control device, a reciprocating trimmer is arranged on the side face of the protective shell, a roller cleaning machine is movably arranged on the side edge of the protective shell, and a control cylinder is movably arranged in the protective shell. According to the multifunctional road and bridge maintenance vehicle, by means of the operation of turning over the roller cleaning machine, the driving cylinder is started and moves, then the control cylinder arranged on the end face is dragged to displace, and the roller cleaning machine is driven to rotate, so that the roller cleaning machine is driven to rotate, and the spraying assembly is driven to rotate to clean the guardrail. The process causes the drive part to be disconnected from the part of the control cylinder, the necessity of manual participation is reduced, the arranged spraying assembly can achieve flexible cutting of two different hole diameters in the process of rotating the roller cleaning machine, and it is ensured that the cleaning process is smoother and more efficient.

Description

Technical Field

[0001] The invention relates to the technical field of road and bridge maintenance, in particular to a multifunctional road and bridge maintenance vehicle. Background Art

[0002] The multifunctional road and bridge maintenance vehicle is specially designed for the maintenance of roads and bridges. Its functions cover cleaning of guardrails, trimming of green belts, etc. In terms of guardrail maintenance, the vehicle is equipped with a professional guardrail cleaning roller brush, which is cleverly installed on the vehicle body. When in use, the roller brush fits tightly to the side of the guardrail to be cleaned, and as it starts to rotate, it sprays clean water synchronously, thereby efficiently achieving the purpose of cleaning the guardrail. As for the trimming of the green belt, it depends on the green belt trimmer installed on the vehicle. The machine uses two precisely matched serrated plates to accurately trim the top and sides of the green belt in a reciprocating sliding manner to ensure uniform trimming results.

[0003] Unfortunately, however, these two functions are often carried on two different vehicles to achieve their respective work purposes. This split working mode not only increases the complexity of manual operation, but also occupies more resources, affecting the overall efficiency and cost-effectiveness of maintenance operations. For this reason, we propose a multifunctional road and bridge maintenance vehicle. Summary of the invention

[0004] A technical problem to be solved by the present application is that when green belt pruning and guardrail cleaning are required, two different vehicles need to be used, and different types of drivers and double the manpower are required, which takes up more resources and increases costs.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a multifunctional road and bridge maintenance vehicle, including a mobile control device and a protective shell arranged on the mobile control device, a reciprocating trimmer is arranged on the side of the protective shell, a roller cleaner is movably arranged on the side of the protective shell, and also includes:

[0006] A control cylinder, the control cylinder being movably disposed inside the protective shell;

[0007] A driving cylinder, the driving cylinder is movably arranged inside the protective shell, and an end surface of the driving cylinder is movably arranged on the control cylinder;

[0008] A switching unit, which is arranged on the protective shell and is used to control the movement of the driving cylinder and then adjust the displacement of the control cylinder, so that the driving part of the switching unit turns off the reciprocating trimmer and synchronously switches the driving part of the switching unit to the drum cleaning machine to rotate and clean it;

[0009] The spraying assembly is arranged on the outside of the protective shell, and is used to synchronously adjust the spraying water flow when the rotary drum cleaning machine is switched, so that it is switched into water mist for use in cleaning the guardrail with the drum cleaning machine.

[0010] In some embodiments, the switching unit includes a synchronous motor arranged in a protective shell, an output shaft is arranged at the output end of the synchronous motor, a movable cylinder is movably sleeved on the outer surface of the output shaft, the driving cylinder is movably sleeved on the movable cylinder, and an oblique annular groove is opened on the inner wall of the driving cylinder, a slider is arranged on the movable cylinder, and the slider is movably arranged on the inner wall of the oblique annular groove.

[0011] In some embodiments, a shaft is rotatably provided on the inner wall of the protective shell, a secondary gear is rotatably provided on the end face of the shaft, a main gear meshing with the secondary gear is provided on the outer surface of the output shaft, a fixing ring is provided on the end face of the secondary gear, and the fixing ring is sleeved on the shaft, and a plurality of circular grooves are provided on the port of the fixing ring away from the secondary gear.

[0012] In some embodiments, the control cylinder is sleeved on the shaft, and a plurality of plug rods are provided on the end face of the control cylinder close to the secondary gear, and the plurality of plug rods are movably provided inside the circular groove. A return spring is sleeved on the shaft, and the end face of the return spring is provided on the shaft. The other end of the return spring is movably provided on the end face of the control cylinder, and a reciprocating part for the reciprocating trimmer to perform reciprocating motion is provided on the shaft.

[0013] In some embodiments, the reciprocating member includes a rotating cylinder arranged on a shaft rod, an outer surface of the rotating cylinder is provided with an oblique groove, an inclined disc is movably arranged inside the oblique groove, and the inclined disc is movably sleeved on the shaft rod, a movable shaft is arranged on the outer surface of the oblique disc, a telescopic rod is arranged inside the protective shell, the movable shaft is movably arranged inside the telescopic rod, and the output end of the telescopic rod passes through the protective shell and is arranged inside the reciprocating trimmer, so that the movable blade of the reciprocating trimmer performs reciprocating motion.

[0014] In some embodiments, a fixing plate is provided on the inner wall of the protective shell, and the fixing plate is movably sleeved on the outer surface of the driving cylinder. A transmission wheel is rotatably provided on the end face of the output shaft, and a rotating rod is movably provided on the end face of the transmission wheel. The end face of the rotating rod is rotatably provided on the inner wall of the protective shell.

[0015] In some embodiments, a support ring is movably provided on the outer surface of the rotating rod, and a driven wheel meshing with the transmission wheel is provided on the support ring. A driving shaft is provided on the end face of the driven wheel, and the driven wheel is used to drive the cleaning cylinder in the drum cleaning machine to rotate. A slide groove is provided on the protective shell, and the driving shaft is movably provided inside the slide groove. An L-shaped plate is movably provided on the driving shaft, and the other side of the L-shaped plate is movably provided on the outer surface of the movable cylinder, and the movement trajectory of the L-shaped plate on the outer surface of the movable cylinder is arc-shaped, and a clamping member for connecting the driving force of the synchronous motor and the transmission wheel is provided on the movable cylinder.

[0016] In some embodiments, the engaging part includes a ring movably arranged on the end face of the movable cylinder, the end face of the ring is provided with a plurality of straight rods, the end face of the straight rod is provided with a movable ring movably mounted on the output shaft, the inner wall of the movable ring is provided with a plurality of guide grooves, the outer surface of the output shaft is provided with a plurality of guide plates, the plurality of guide plates are movably arranged on the inner walls of the guide grooves respectively, the end face of the transmission wheel away from the rotating rod is provided with a plurality of connecting grooves, the end face of the movable ring is provided with a plurality of wedge blocks, and the plurality of wedge blocks are movably arranged on the inner walls of the corresponding connecting grooves.

[0017] In some embodiments, the spray assembly includes a connecting pipe arranged on the side of the protective shell, the end face of the connecting pipe is provided with interconnected nozzles, the inner wall of the nozzle is provided with a fixed disk, the end face of the fixed disk is provided with a plurality of straight grooves, the end face of the fixed disk is rotatably provided with a baffle, the end face of the baffle is provided with dust reduction holes corresponding to the plurality of straight grooves, the outer surface of the baffle is provided with a plurality of cleaning holes, the outer surface of the baffle is provided with a rotating shell, the rotating shell is provided with a U-shaped plate, the other side of the U-shaped plate is movably provided on the driving shaft, the internal thread of the U-shaped plate is connected with a threaded rod, the end face of the threaded rod is rotatably provided with an extrusion disk, and the other end of the threaded rod is provided with a hexagonal disk.

[0018] In some embodiments, a ball is movably embedded on the sliding block, and the outer surface of the ball is movably disposed on the inner wall of the oblique annular groove.

[0019] The present invention has at least the following beneficial effects:

[0020] 1. By turning over the operation of the drum cleaning machine, the driving cylinder is started and moves, thereby pulling the control cylinder arranged on the end surface to move. This process causes the driving component to be disconnected from the control cylinder, and then the movement of the reciprocating component stops. At the same time, the synchronous driving cylinder drives the engaging component to move, prompting the driving component to be reconnected to the drum cleaning machine, so that the driving component of the reciprocating trimmer can be smoothly switched to the drum cleaning machine, and both of them only need one driving component to complete their respective operation requirements, which significantly reduces the required space. The combination of the two not only optimizes the allocation of resources, but also reduces the necessity of manual participation;

[0021] 2. The spraying assembly can realize flexible cutting of two different apertures during the rotating drum cleaning machine. The smaller aperture design can work in conjunction with the reciprocating trimmer, effectively reducing the dust generated by cutting when trimming the green belt and improving the cleanliness of the working environment. The larger aperture complements the drum cleaner, which not only significantly enhances the wetting effect of the drum, but also pre-wets the guardrail, providing convenience for subsequent cleaning work and ensuring a smoother and more efficient cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of a reciprocating trimmer and a drum cleaning machine of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the reciprocating member, the drum cleaning machine and the switching unit of the present invention;

[0025] Figure 4 is a schematic cross-sectional structural diagram of a switching unit of the present invention;

[0026] Figure 5 It is a schematic diagram of the exploded structure of the switching unit and the reciprocating member of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the movable cylinder, the U-shaped plate and the engaging member of the present invention;

[0028] Figure 7 It is a schematic diagram of the exploded structure of the driving cylinder, the driving shaft and the engaging member of the present invention;

[0029] Figure 8 It is a schematic diagram of the exploded structure of the L-shaped plate, the sleeve ring, the straight rod, the moving ring and the transmission wheel of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the spray assembly and the drive shaft of the present invention;

[0031] Fig.10It is a schematic diagram of the explosion structure of the spray assembly of the present invention;

[0032] Fig.11 It is a schematic diagram of the structure of the slider and the ball of the present invention.

[0033] In the figure: 1. mobile control device; 2. reciprocating trimmer; 3. drum cleaner; 4. protective shell; 5. spray assembly; 51. U-shaped plate; 52. connecting pipe; 53. rotating shell; 54. threaded rod; 55. baffle; 56. hexagonal plate; 57. extrusion plate; 58. nozzle; 59. fixed plate; 510. straight groove; 511. dust suppression hole; 512. cleaning hole; 6. slide; 7. reciprocating member; 71. telescopic rod; 72. movable shaft; 73. rotating cylinder; 74. inclined disc; 75. inclined slot; 8. switching unit; 81. synchronous motor; 82. shaft; 83. secondary gear; 84. Output shaft; 85. Main gear; 86. Return spring; 87. Oblique ring groove; 88. Sliding block; 89. Fixed ring; 810. Insert rod; 811. Circular groove; 812. Fixed plate; 813. Transmission wheel; 814. Rotating rod; 815. Movable cylinder; 816. L-shaped plate; 817. Driven wheel; 818. Drive shaft; 819. Support ring; 9. Drive cylinder; 10. Control cylinder; 11. Engaging part; 111. Sleeve ring; 112. Straight rod; 113. Moving ring; 114. Wedge block; 115. Guide groove; 116. Connecting groove; 117. Guide plate; 12. Ball. DETAILED DESCRIPTION

[0034] 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.

[0035] Example 1: Please refer to Figure 1-10 The present invention provides a technical solution: a multifunctional road and bridge maintenance vehicle, comprising a mobile control device 1 and a protective shell 4 arranged on the mobile control device 1, a reciprocating trimmer 2 is arranged on the side of the protective shell 4, a roller cleaner 3 is movably arranged on the side of the protective shell 4, and also includes:

[0036] A control cylinder 10, which is movably disposed inside the protective shell 4;

[0037] The driving cylinder 9 is movably arranged inside the protective shell 4, and its end surface is movably arranged on the control cylinder 10, and the two are switched to fit together;

[0038] The switching unit 8 is arranged on the protective shell 4 and is used to control the movement of the driving cylinder 9 and then adjust the displacement of the control cylinder 10, so that the driving part of the switching unit 8 turns off the reciprocating trimmer 2 and synchronously switches the driving part of the switching unit 8 to the drum cleaner 3 to rotate and clean it;

[0039] The spraying assembly 5 is arranged on the outside of the protective shell 4, and is used to synchronously adjust the spraying water flow when the rotary drum cleaning machine 3 is switched, so that it is switched to water mist used to cooperate with the drum cleaning machine 3 to clean the guardrail.

[0040] The switching unit 8 includes a synchronous motor 81 arranged in the protective shell 4, and an output shaft 84 is arranged at the output end of the synchronous motor 81. A movable cylinder 815 is movably sleeved on the outer surface of the output shaft 84. The driving cylinder 9 is movably sleeved on the movable cylinder 815, and an oblique annular groove 87 is opened on the inner wall of the driving cylinder 9. A slider 88 is arranged on the movable cylinder 815, and the slider 88 is movably arranged on the inner wall of the oblique annular groove 87. The starting position of the synchronous motor 81 is the same. By sliding the slider 88 inside the oblique annular groove 87, the driving cylinder 9 can be driven to perform reciprocating motion.

[0041] The inner wall of the protective shell 4 is rotatably provided with a shaft 82, and the end face of the shaft 82 is rotatably provided with a secondary gear 83. The outer surface of the output shaft 84 is provided with a main gear 85 meshing with the secondary gear 83. The end face of the secondary gear 83 is provided with a fixing ring 89, and the fixing ring 89 is sleeved on the shaft 82. A plurality of circular grooves 811 are provided at the end of the fixing ring 89 away from the secondary gear 83. The main gear 85 is the driving part, and the secondary gear 83 is the transmission part.

[0042] The control cylinder 10 is sleeved on the shaft 82, and a plurality of plug rods 810 are provided on the end face of the control cylinder 10 close to the secondary gear 83. The plurality of plug rods 810 are movably provided inside the circular groove 811. A return spring 86 is sleeved on the shaft 82. The end face of the return spring 86 is provided on the shaft 82. The other end of the return spring 86 is movably provided on the end face of the control cylinder 10. A reciprocating member 7 for the reciprocating trimmer 2 to perform reciprocating motion is provided on the shaft 82. By inserting the plug rod 810 into the circular groove 811, the control cylinder 10 can rotate under the drive of the secondary gear 83 and drive the shaft 82 to rotate. The return spring 86 can squeeze the plug rod 810 into the circular groove 811. The circular groove 811 and the plug rod 810 are both circumferentially relatively distributed.

[0043] The reciprocating member 7 includes a rotating cylinder 73 arranged on the shaft 82, and an inclined groove 75 is provided on the outer surface of the rotating cylinder 73. An inclined disc 74 is movably provided inside the inclined groove 75, and the inclined disc 74 is movably sleeved on the shaft 82. A movable shaft 72 is provided on the outer surface of the inclined disc 74. A telescopic rod 71 is provided inside the protective shell 4, and the movable shaft 72 is movably provided inside the telescopic rod 71. The output end of the telescopic rod 71 passes through the protective shell 4 and is arranged inside the reciprocating trimmer 2, so that the movable blade of the reciprocating trimmer 2 reciprocates. The rotating cylinder 73 with the inclined groove 75 can drive the inclined disc 74 inside the inclined groove 75 to move, thereby driving the movable shaft 72 to reciprocate.

[0044] A fixing plate 812 is provided on the inner wall of the protective shell 4, and the fixing plate 812 is movably sleeved on the outer surface of the driving cylinder 9. A transmission wheel 813 is rotatably provided on the end face of the output shaft 84, and a rotating rod 814 is movably provided on the end face of the transmission wheel 813. The end face of the rotating rod 814 is rotatably provided on the inner wall of the protective shell 4. The fixing plate 812 serves as a support for the driving cylinder 9, and the rotating rod 814 serves as a support for the transmission wheel 813.

[0045] The outer surface of the rotating rod 814 is movably sleeved with a support ring 819, and a driven wheel 817 meshing with the transmission wheel 813 is arranged on the support ring 819. The end surface of the driven wheel 817 is provided with a driving shaft 818, and the driven wheel 817 is used to drive the cleaning cylinder in the drum cleaning machine 3 to rotate. A slide groove 6 is opened on the protective shell 4, and the driving shaft 818 is movably arranged inside the slide groove 6. An L-shaped plate 816 is movably arranged on the driving shaft 818, and the other side of the L-shaped plate 816 is movably arranged On the outer surface of the movable cylinder 815, and the movement trajectory of the L-shaped plate 816 on the outer surface of the movable cylinder 815 is arc-shaped, the movable cylinder 815 is provided with a clamping part 11 for connecting the driving force of the synchronous motor 81 and the transmission wheel 813, the support ring 819 can make the drum cleaner 3 rotate around it, and drive the driven wheel 817 and the driving shaft 818 to move, the L-shaped plate 816 is arc-shaped on the movable cylinder 815, then the movable cylinder 815 will perform an upward and rotating movement trajectory.

[0046] The engaging member 11 includes a sleeve 111 movably arranged on the end face of the movable cylinder 815, a plurality of straight rods 112 are arranged on the end face of the sleeve 111, a movable ring 113 movably arranged on the end face of the straight rod 112 is arranged on the end face of the output shaft 84, a plurality of guide grooves 115 are provided on the inner wall of the movable ring 113, a plurality of guide plates 117 are provided on the outer surface of the output shaft 84, and the plurality of guide plates 117 are movably arranged on the inner walls of the corresponding guide grooves 115, a plurality of connecting grooves 116 are provided on the end face of the transmission wheel 813 away from the rotating rod 814, a plurality of wedge blocks 114 are arranged on the end face of the movable ring 113, and the plurality of wedge blocks 114 are movably arranged on the inner walls of the corresponding connecting grooves 116, and by inserting the wedge blocks 114 into the corresponding connecting grooves 116, the guide grooves 115 opened inside the movable ring 113 will be synchronously entered into the guide plates 117, so that the transmission wheel 813 can be driven to rotate when the output shaft 84 rotates.

[0047] The spray assembly 5 includes a connecting pipe 52 arranged on the side of the protective shell 4, and the end face of the connecting pipe 52 is provided with a nozzle 58 that is interconnected, and the inner wall of the nozzle 58 is provided with a fixed disk 59, and the end face of the fixed disk 59 is provided with a plurality of straight grooves 510, and the end face of the fixed disk 59 is rotatably provided with a baffle 55, and the end face of the baffle 55 is provided with dust removal holes 511 corresponding to the plurality of straight grooves 510, and the outer surface of the baffle 55 is provided with a plurality of cleaning holes 512, and the outer surface of the baffle 55 is provided with a rotating shell 53, and the rotating shell 53 is provided with a U-shaped plate 51, and the other side of the U-shaped plate 51 is movably provided on the driving shaft 818, and the internal thread of the U-shaped plate 51 is connected with a threaded rod 54, and the end face of the threaded rod 54 is rotatably provided with an extrusion disk 57, and the other end of the threaded rod 54 is provided with a hexagonal disk 56, and the dust removal hole 511 and the cleaning hole can be switched by rotating the drum cleaner 3 by 90 degrees to achieve the conversion between dust removal and cleaning.

[0048] When using this device, first, when using the reciprocating trimmer 2, it is only necessary to start the synchronous motor 81, and the synchronous motor 81 drives the output shaft 84 to rotate. The output shaft 84 will drive the main gear 85 mounted on the outer surface to rotate, and the main gear 85 drives the secondary gear 83 meshing on the outer surface to rotate, and the secondary gear 83 drives the fixing ring 89 set on the end face to rotate. Since the insertion rod 810 is inserted into the corresponding circular groove 811, the fixing ring 89 will drive the control cylinder 10 to rotate through the insertion rod 810, and the control cylinder 10 drives the shaft 82 to rotate. The shaft 82 will drive the rotating cylinder 73 to rotate, and the rotating cylinder 73 drives the inclined disk 74 inside the inclined groove 75 to rotate, and the inclined groove 75 drives the movable shaft 72 to move, and the movable shaft 72 drives the telescopic rod 71 to reciprocate and be used in combination with the reciprocating trimmer 2.

[0049] When it is necessary to switch to the movement of the drum cleaning machine 3, the rotating hexagonal disk 56 drives the threaded rod 54 to rotate, and the extrusion disk 57 is away from the outer surface of the protective shell 4, which can drive the drum cleaning machine 3 to rotate. For this reason, when the drum cleaning machine 3 is rotated, the driving shaft 818 can be driven to slide inside the sliding groove 6, and at the same time, the driven wheel 817 can be driven to rotate on the outer surface of the transmission wheel 813. During the movement, the driving shaft 818 will drive the L-shaped plate 816 to move, and the L-shaped plate 816 drives the movable cylinder 815 to rotate. The movable cylinder 815 drives the slider 88 on the outer surface to move inside the oblique annular groove 87 in the driving cylinder 9, which can drive the driving cylinder 9 to move, so that the driving cylinder 9 drives the control cylinder 10 to move, and the control cylinder 10 drives the plug 810 set on the end surface to move away from the circular groove 811 on the fixed ring 89. Then, when the main gear 85 drives the secondary gear 83 to rotate, it cannot drive the shaft rod 82 to rotate. At this time, the driving cylinder 9 is against the control cylinder 10, and the control cylinder 10 cannot move, so the synchronous driving cylinder 9 It will drive the movable cylinder 815 to move and rotate, and the movable cylinder 815 will drive the ring 111 movably arranged on the end surface to move, the ring 111 drives the straight rod 112 arranged on the end surface to move, the straight rod 112 drives the movable ring 113 arranged on the end surface to move, the movable ring 113 drives the internal guide groove 115 to pass through the corresponding guide plate 117, and the set wedge block 114 will enter the wedge block 114 on the end surface of the connecting groove 116, so that the rotating output shaft 84 can drive the guide plate 117 to rotate, the guide plate 117 drives the movable ring 113 to rotate, the movable ring 113 drives the transmission wheel 813 arranged on the outer surface to rotate, and the transmission wheel 813 drives the meshing drive shaft 818 to rotate, so that the movement of the drum cleaning machine 3 is completed, and during use, it can synchronously drive the U-shaped plate 51 to move, the U-shaped plate 51 drives the rotating shell 53 in the red side to rotate, the rotating shell 53 rotates the baffle 55 arranged inside, and switches the dust removal hole 511 on the baffle 55 to the cleaning hole 512.

[0050] Example 2: Please refer to Fig.11 The present invention provides a technical solution: a ball 12 is movably embedded on a slider 88, and the outer surface of the ball 12 is movably arranged on the inner wall of the oblique ring groove 87. The arrangement of the ball 12 on the slider 88 can reduce the friction force of the slider 88 contacting the oblique ring groove 87, thereby reducing the occurrence of the jamming phenomenon caused by excessive friction.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A multifunctional road and bridge maintenance vehicle, comprising a mobile control device (1) and a protective shell (4) arranged on the mobile control device (1), a reciprocating trimmer (2) being arranged on the side of the protective shell (4), and a roller cleaner (3) being movably arranged on the side of the protective shell (4), characterized in that: Also included are: A control cylinder (10), wherein the control cylinder (10) is movably arranged inside the protective shell (4); A driving cylinder (9), the driving cylinder (9) being movably arranged inside the protective shell (4), and having an end surface movably arranged on the control cylinder (10); A switching unit (8), the switching unit (8) being arranged on the protective shell (4) and used for controlling the movement of the driving cylinder (9) and thereby adjusting the displacement of the control cylinder (10), so that the driving part of the switching unit (8) turns off the reciprocating trimmer (2) and synchronously switches the driving part of the switching unit (8) to the drum cleaning machine (3) to rotate and clean it; A spraying assembly (5) is arranged on the outside of the protective shell (4) and is used to synchronously adjust the spraying water flow when the rotary drum cleaning machine (3) is switched, so that the spraying water flow is switched to a water mist used to cooperate with the drum cleaning machine (3) to clean the guardrail.

2. The multifunctional road and bridge maintenance vehicle according to claim 1 is characterized in that: The switching unit (8) comprises a synchronous motor (81) arranged in a protective shell (4); an output shaft (84) is arranged at the output end of the synchronous motor (81); a movable cylinder (815) is movably sleeved on the outer surface of the output shaft (84); the driving cylinder (9) is movably sleeved on the movable cylinder (815); an oblique annular groove (87) is formed on the inner wall of the driving cylinder (9); a sliding block (88) is arranged on the movable cylinder (815); and the sliding block (88) is movably arranged on the inner wall of the oblique annular groove (87).

3. The multifunctional road and bridge maintenance vehicle according to claim 2 is characterized in that: The inner wall of the protective shell (4) is rotatably provided with a shaft (82), the end surface of the shaft (82) is rotatably provided with a secondary gear (83), the outer surface of the output shaft (84) is provided with a main gear (85) meshing with the secondary gear (83), the end surface of the secondary gear (83) is provided with a fixing ring (89), and the fixing ring (89) is sleeved on the shaft (82), and a port of the fixing ring (89) away from the secondary gear (83) is provided with a plurality of circular grooves (811).

4. The multifunctional road and bridge maintenance vehicle according to claim 3 is characterized in that: The control cylinder (10) is sleeved on the shaft (82), and a plurality of insertion rods (810) are arranged on the end surface of the control cylinder (10) close to the secondary gear (83), and the plurality of insertion rods (810) are movably arranged inside the circular groove (811). A return spring (86) is sleeved on the shaft (82), and the end surface of the return spring (86) is arranged on the shaft (82). The other end of the return spring (86) is movably arranged on the end surface of the control cylinder (10). A reciprocating member (7) for the reciprocating trimmer (2) to perform reciprocating motion is arranged on the shaft (82).

5. The multifunctional road and bridge maintenance vehicle according to claim 4 is characterized in that: The reciprocating member (7) comprises a rotating cylinder (73) arranged on a shaft (82); an outer surface of the rotating cylinder (73) is provided with an inclined groove (75); an inclined disc (74) is movably arranged inside the inclined groove (75); and the inclined disc (74) is movably sleeved on the shaft (82); a movable shaft (72) is arranged on the outer surface of the inclined disc (74); a telescopic rod (71) is arranged inside the protective shell (4); the movable shaft (72) is movably arranged inside the telescopic rod (71); an output end of the telescopic rod (71) passes through the protective shell (4) and is arranged inside the reciprocating trimmer (2), so that the movable blade of the reciprocating trimmer (2) performs reciprocating motion.

6. The multifunctional road and bridge maintenance vehicle according to claim 5 is characterized in that: The inner wall of the protective shell (4) is provided with a fixing plate (812), the fixing plate (812) is movably sleeved on the outer surface of the driving cylinder (9), the end surface of the output shaft (84) is rotatably provided with a transmission wheel (813), the end surface of the transmission wheel (813) is movably provided with a rotating rod (814), and the end surface of the rotating rod (814) is rotatably provided on the inner wall of the protective shell (4).

7. The multifunctional road and bridge maintenance vehicle according to claim 6 is characterized in that: The outer surface of the rotating rod (814) is movably sleeved with a support ring (819), and a driven wheel (817) meshing with the transmission wheel (813) is arranged on the support ring (819), and a driving shaft (818) is arranged on the end surface of the driven wheel (817), and the driven wheel (817) is used to drive the cleaning cylinder in the drum cleaning machine (3) to rotate. The protective shell (4) is provided with a slide groove (6), and the driving shaft (818) is movably arranged inside the slide groove (6). An L-shaped plate (816) is movably arranged on the driving shaft (818), and the other side of the L-shaped plate (816) is movably arranged on the outer surface of the movable cylinder (815), and the movement trajectory of the L-shaped plate (816) on the outer surface of the movable cylinder (815) is in the shape of an arc, and a clamping member (11) for connecting the driving force of the synchronous motor (81) and the transmission wheel (813) is arranged on the movable cylinder (815).

8. The multifunctional road and bridge maintenance vehicle according to claim 7 is characterized in that: The engaging member (11) comprises a sleeve (111) movably arranged on the end face of a movable cylinder (815); a plurality of straight rods (112) are arranged on the end face of the sleeve (111); a movable ring (113) movably sleeved on the output shaft (84) is arranged on the end face of the straight rod (112); a plurality of guide grooves (115) are arranged on the inner wall of the movable ring (113); a plurality of guide plates (117) are arranged on the outer surface of the output shaft (84); the plurality of guide plates (117) are movably arranged on the inner walls of the guide grooves (115) respectively; a plurality of connecting grooves (116) are arranged on the end face of the transmission wheel (813) away from the rotating rod (814); a plurality of wedge blocks (114) are arranged on the end face of the movable ring (113); the plurality of wedge blocks (114) are movably arranged on the inner walls of the corresponding connecting grooves (116).

9. The multifunctional road and bridge maintenance vehicle according to claim 1, characterized in that: The spray assembly (5) comprises a connecting pipe (52) arranged on the side of the protective shell (4); the end surface of the connecting pipe (52) is provided with mutually connected spray heads (58); the inner wall of the spray head (58) is provided with a fixing plate (59); the end surface of the fixing plate (59) is provided with a plurality of straight grooves (510); the end surface of the fixing plate (59) is rotatably provided with a baffle (55); the end surface of the baffle (55) is provided with dust removal holes (511) corresponding to the plurality of straight grooves (510); A plurality of cleaning holes (512) are provided on the outer surface of the baffle plate (55); a rotating shell (53) is provided on the outer surface of the baffle plate (55); a U-shaped plate (51) is provided on the rotating shell (53); the other side of the U-shaped plate (51) is movably provided on the driving shaft (818); a threaded rod (54) is connected to the inner thread of the U-shaped plate (51); an extrusion disk (57) is rotatably provided on the end surface of the threaded rod (54); and a hexagonal disk (56) is provided on the other end of the threaded rod (54).

10. The multifunctional road and bridge maintenance vehicle according to claim 2, characterized in that: A ball (12) is movably embedded on the slider (88), and the outer surface of the ball (12) is movably arranged on the inner wall of the oblique annular groove (87).

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