Spray boom adjustment device and sanitation vehicle

Abstract

This invention relates to the field of sanitation equipment technology, and discloses a spray boom adjustment device and a sanitation vehicle. The spray boom adjustment device includes a spray boom, a driving member, a first rack, and a second rack. A driven gear is fixedly mounted on the spray boom, with its axial direction along the length of the spray boom. The driving member is positioned above the spray boom. The lower part of the first rack meshes with the driven gear, and the upper part is connected to the driving member. The driving member is adapted to drive the first rack to move up and down, thereby rotating the driven gear and causing the spray boom to rotate around its axis. The tooth surface of the second rack is opposite to the tooth surface of the first rack. The second rack has a connected position and a disconnected position. In the connected position, the lower part of the second rack meshes with the driven gear, and the upper part is connected to the driving member. The driving member is adapted to drive the second rack to move up and down, thereby causing the spray boom to move up and down. In the disconnected position, the second rack is separated from the driven gear and the driving member. The spray boom height and angle adjustment device of this invention has a simple structure and is easy to operate.

Description

Technical Field

[0001] This invention relates to the field of sanitation equipment technology, specifically to a spray boom adjustment device and a sanitation vehicle. Background Technology

[0002] Sanitation vehicles include sweeper trucks. Sweeper trucks can be used alone as road sweepers for road cleaning and suction operations; they can also be used as high-pressure flushing trucks for road washing and suction operations; or they can be used in combination with high-pressure water flushing, allowing for multiple combinations of sweeping, flushing, and suction to meet the diverse needs of different users. They are widely applicable to the washing and cleaning operations of main roads and overpasses in urban areas.

[0003] A sweeper truck includes a spray boom with multiple nozzles that spray water for cleaning and sweeping. However, depending on different road conditions and the degree of dirt on the surface, the spray boom needs to be adjusted to different heights or the spray angle of the nozzles to avoid wasting water and improve operational efficiency. Therefore, if the height and angle of the spray boom are not adjustable, it cannot handle different road surfaces and varying degrees of dirt.

[0004] Existing technologies have devices for adjusting the height and angle of the spray boom, but these have drawbacks such as complex structure and cumbersome operation. Summary of the Invention

[0005] In view of this, the present invention provides a spray boom adjustment device and a sanitation vehicle to solve the problems of complex structure and cumbersome operation of the existing spray boom height and angle adjustment device.

[0006] In a first aspect, the present invention provides a spray bar adjustment device, comprising a spray bar, a driving member, a first rack, and a second rack. A driven gear is fixedly mounted on the spray bar, with its axial direction aligned along the length of the spray bar. The driving member is positioned above the spray bar. The lower part of the first rack meshes with the driven gear, and the upper part of the first rack is connected to the driving member. The driving member is adapted to drive the first rack to move up and down, thereby rotating the driven gear and causing the spray bar to rotate around its axis. The second rack is movable, with its tooth surfaces facing the tooth surfaces of the first rack. The second rack has a connected position and a disconnected position. In the connected position, the lower part of the second rack meshes with the driven gear, and the upper part of the second rack is connected to the driving member. The driving member is adapted to drive the second rack to move up and down, thereby causing the spray bar to move vertically. In the disconnected position, the second rack is separated from the driven gear and the driving member.

[0007] Using the technical solution provided by this invention, an active component is set up to input power. A driven gear is set on the spray bar. The upper part of the first rack is connected to the active component and can receive the torque transmitted by the active component. The active component can drive the first rack to move up and down. The lower part of the first rack is connected to the driven gear. Thus, the up and down movement of the first rack driven by the active component is converted into the rotation of the spray bar around its axis through the meshing of the first rack and the driven gear, thereby realizing the adjustment of the spray bar angle. By setting a second rack, the second rack can move. When the second rack moves to the connection position, the upper part of the second rack is connected to the active component and can receive the torque transmitted by the active component. The active component can drive the second rack to move up and down. The lower part of the second rack meshes with the driven gear. Since the driven gear meshes with both the first and second racks simultaneously, and the tooth surfaces of the first and second racks are arranged oppositely, the torque transmission direction to the driven gear is opposite, so that the driven gear does not rotate. Under the drive of the first and second racks, it moves up and down, thereby driving the spray bar to move up and down, adjusting the height of the spray bar. The spray boom adjustment device provided by this invention has a simple and compact structure, low cost, and can adjust the height and angle of the spray boom to improve the operation effect of sanitation vehicles.

[0008] As an optional implementation, the driving component includes a screw, with the screw, a first rack, and a second rack parallel to each other. By configuring the screw, the first rack, and the screw, as well as the second rack and the screw, to be connected via threaded transmission, the structure is simple, easy to manufacture, provides continuous and smooth movement, and has a large load-bearing capacity. By inputting a small rotational torque to the screw, a large axial force is converted, resulting in high transmission accuracy. This is beneficial for improving the precision of adjusting the spray boom angle and height. Furthermore, the threaded transmission of the screw has a self-locking characteristic to maintain the current height or angle of the spray boom.

[0009] As an optional implementation, one end of the screw is connected to a transmission mechanism that drives the screw to rotate. By providing the transmission mechanism, power can be input to the screw.

[0010] As an optional implementation, the transmission mechanism includes a drive shaft, a bidirectional ratchet mechanism, and a transmission pair. The bidirectional ratchet mechanism is connected to the drive shaft and is suitable for driving the drive shaft to rotate in both directions. The drive shaft and the screw are connected by the transmission pair. By setting the bidirectional ratchet mechanism, it is possible to input forward and reverse power to the screw, and the bidirectional ratchet mechanism has self-locking properties, which can maintain the height and angle position of the spray bar, improving the accuracy of adjusting the height and angle of the spray bar. The structure of the transmission mechanism is selected according to the actual needs, choosing different numbers and spatial arrangements of transmission pairs.

[0011] As an optional implementation, the spray bar adjustment device further includes a switching mechanism. The actuating end of the switching mechanism is connected to the second rack, and is adapted to drive the second rack to switch between a connected position and a disconnected position. The actuating end of the switching mechanism is slidably connected to the second rack, and the actuating end of the switching mechanism is adapted to slide along the length direction of the second rack. By setting a switching mechanism, the movement of the second rack can be easily controlled, allowing it to switch between the connected and disconnected positions, thus improving the reliability of the spray bar adjustment device. When the second rack is in the connected position, it is used to adjust the height of the spray bar; when the second rack is in the disconnected position, the angle of the spray bar is adjusted through the meshing transmission of the first rack.

[0012] As an optional implementation, the switching mechanism includes a fixed base, a push-pull assembly, and a locking assembly; the push-pull assembly is slidably disposed on the fixed base, and the first end of the push-pull assembly is the actuating end of the switching mechanism; the locking assembly includes an elastic locking head, which has a first position and a second position. In the first position, the elastic locking head abuts against the locking point to restrict the relative movement of the push-pull assembly and the fixed base, so that the second rack is held in the connected position; in the second position, the elastic locking head disengages from the locking point to allow the push-pull assembly to move relative to the fixed base and drive the second rack to move to the disengaged position.

[0013] By incorporating a resilient locking head, the locking point is secured by the elastic element. Controlling the movement of the push-pull assembly allows the second rack to switch between connected and disengaged positions. The position of the second rack can be changed simply by pushing or pulling the push-pull assembly, and the resilient locking head ensures the rack maintains its current position, making operation convenient and reliable.

[0014] As an optional implementation, the switching mechanism includes a drive cylinder. When the switching mechanism is equipped with a drive cylinder, it has a simple structure, low cost, rapid action, and fast response, enabling precise and rapid switching of the height and angle adjustment process of the spray bar.

[0015] As an optional implementation, the locking assembly includes a limiting groove that mates with the elastic lock head. One of the elastic lock head and the limiting groove is located on a fixed base, and the other is located on the push-pull assembly. The limiting groove, mates with the elastic lock head, limits its movement and improves the reliability of the switching mechanism's control over the second rack. During the movement of the push-pull assembly, when the elastic lock head encounters the limiting groove, it automatically pops out and engages in the limiting groove under the action of elastic force, thus achieving fixed-point limiting of the second rack.

[0016] As an optional implementation, the resilient lock head includes a first resilient element and a top ball, and the push-pull assembly includes a push-pull rod with a guide hole. The first resilient element and the top ball are disposed within the guide hole. This configuration, where the first resilient element and the top ball are located within the guide hole, allows the guide hole to limit and guide the resilient element and the top ball, enabling the top ball to move along the guide hole, improving the accuracy of the top ball's movement, and thus ensuring the accuracy of the second rack's movement.

[0017] As an optional implementation, the push-pull rod has a limiting step, and a second elastic element is provided between the limiting step and the second rack. When the elastic lock head is in the first position, the second elastic element is adapted to apply an elastic force to the second rack to keep the second rack in the connected position. By providing the second elastic element, when the elastic lock head and the limiting groove abut, the second rack is in the connected position, and the second elastic force applies an elastic force to the second rack to keep the second rack in the connected position, ensuring the reliability and temperature resistance of the connection between the second rack and the driving element.

[0018] Secondly, the present invention also provides a sanitation vehicle, including a vehicle body and a spray bar adjustment device according to any of the above technical solutions, wherein a first rack and a second rack are disposed on the vehicle body.

[0019] Sanitation vehicles equipped with the aforementioned boom adjustment device possess all the advantages of such devices, which will not be elaborated upon here. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a spray bar adjustment device according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A cross-sectional view of the spray bar adjustment device shown;

[0023] Figure 3 for Figure 2 A magnified view of part A in the diagram.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Spray bar; 11. Nozzle; 2. Driven gear; 3. Driving component; 31. Screw; 4. First rack; 5. Second rack; 6. Transmission mechanism; 61. Drive shaft; 62. Bidirectional ratchet mechanism; 63. Transmission pair; 7. Switching mechanism; 71. Fixed base; 72. Push-pull assembly; 721. Push-pull rod; 7211. Limiting step; 73. Locking assembly; 731. Elastic lock head; 7311. First elastic element; 7312. Top ball; 732. Limiting groove; 74. Second elastic element; 8. Housing; 91. Guide component; 92. Sliding component. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The following combination Figures 1 to 3 The following describes embodiments of the present invention.

[0028] According to an embodiment of the present invention, a spray bar adjustment device is provided, comprising a spray bar 1, a driving member 3, a first rack 4, and a second rack 5. A driven gear 2 is fixedly mounted on the spray bar 1, with its axial direction along the length of the spray bar 1. The driving member 3 is positioned above the spray bar 1. The lower part of the first rack 4 meshes with the driven gear 2, and the upper part of the first rack 4 is connected to the driving member 3. The driving member 3 is adapted to drive the first rack 4 to move up and down, thereby rotating the driven gear 2 and causing the spray bar 1 to rotate around its axis. The second rack 5 is movable, with its tooth surface facing the tooth surface of the first rack 4. The second rack 5 has a connected position and a disconnected position. In the connected position, the lower part of the second rack 5 meshes with the driven gear 2, and the upper part of the second rack 5 is connected to the driving member 3. The driving member 3 is adapted to drive the second rack 5 to move up and down, thereby causing the spray bar 1 to move vertically. In the disconnected position, the second rack 5 is separated from the driven gear 2 and the driving member 3.

[0029] Using the technical solution provided by this invention, by setting an active member 3 for inputting power, and by setting a driven gear 2 on the spray bar 1, the upper part of the first rack 4 is connected to the active member 3, which can receive the torque transmitted by the active member 3. The active member 3 can drive the first rack 4 to move up and down; the lower part of the first rack 4 is connected to the driven gear 2. Thus, the up and down movement of the first rack 4 driven by the active member 3 is converted into the rotation of the spray bar 1 around its axis through the meshing of the first rack 4 and the driven gear 2, thereby realizing the adjustment of the angle of the spray bar 1. By setting a second rack 5, the second rack 5 can move. When the second rack 5 moves to the connection position, the upper part of the second rack 5 connects with the driving member 3 and can receive the torque transmitted by the driving member 3. The driving member 3 can drive the second rack 5 to move up and down. The lower part of the second rack 5 meshes with the driven gear 2. Since the driven gear 2 meshes with both the first rack 4 and the second rack 5, and the tooth surfaces of the first rack 4 and the second rack 5 are arranged oppositely, the torque transmission direction to the driven gear 2 is opposite, so the driven gear 2 does not rotate. Driven by the first rack 4 and the second rack 5, it moves up and down, thereby driving the spray bar 1 to move up and down, adjusting the height of the spray bar 1. The spray bar adjustment device provided by the present invention has a simple structure. By changing the position of the first rack 4, the height or angle of the spray bar 1 can be adjusted, which is easy to operate and can realize the adjustment of the height and angle of the spray bar 1 to improve the operation effect of the sanitation vehicle.

[0030] Specifically, the spray bar 1 is provided with a number of nozzles 11 at intervals. Adjusting the height of the spray bar 1 is equivalent to adjusting the height of the nozzles 11, and adjusting the angle of the spray bar 1 is equivalent to adjusting the angle of the nozzles 11.

[0031] As an optional implementation, the driving component 3 includes a screw 31, with the screw 31, first rack 4, and second rack 5 parallel to each other. By setting the screw 31, the first rack 4 and the screw 31, as well as the second rack 5 and the screw 31, to be connected by threaded transmission, the structure is simple, easy to manufacture, the movement is continuous and smooth, and the load-bearing capacity is large. By inputting a small rotational torque to the screw 31, a large axial force is converted, resulting in high transmission accuracy, which is beneficial to improving the accuracy of the angle and height adjustment of the spray boom 1. Furthermore, the threaded transmission of the screw 31 has a self-locking characteristic to maintain the current height or angle of the spray boom 1.

[0032] As an optional implementation, one end of the screw 31 is connected to a transmission mechanism 6 that drives the screw 31 to rotate. By providing the transmission mechanism 6, power can be input to the screw 31.

[0033] As an optional implementation, the transmission mechanism 6 includes a transmission shaft 61, a bidirectional ratchet mechanism 62, and a transmission pair 63. The bidirectional ratchet mechanism 62 is connected to the transmission shaft 61 and is suitable for driving the transmission shaft 61 to rotate in both directions. The transmission shaft 61 and the screw 31 are connected by the transmission pair 63. The transmission pair 63 transmits power to the screw 31, causing the screw 31 to rotate forward or in reverse. By setting the bidirectional ratchet mechanism 62, it is possible to input power to the screw 31 in both forward and reverse directions. Furthermore, the bidirectional ratchet mechanism 62 has self-locking properties, which can maintain the height and angle position of the spray boom 1, improving the accuracy of adjusting the height and angle of the spray boom 1. Specifically, refer to... Figure 1 In this embodiment, the drive shaft 61 and the screw 31 are arranged vertically. Therefore, the transmission pair 63 includes a driving bevel gear on the drive shaft 61 and a driven bevel gear at one end of the screw 31. A bidirectional ratchet mechanism 62 is provided at the power input end of the drive shaft 61.

[0034] As an alternative implementation, the bidirectional ratchet mechanism 62 can be replaced by a motor to drive the bidirectional rotation of the screw 31.

[0035] Of course, the structure of the transmission mechanism 6 can be selected according to the actual needs, with different numbers and spatial arrangements of transmission pairs 63, and no restrictions are imposed here.

[0036] As an optional implementation method, refer to Figure 2 and Figure 3 The spray boom adjustment device also includes a switching mechanism 7. The actuating end of the switching mechanism 7 is connected to the second rack 5, and is adapted to drive the second rack 5 to switch between the connected position and the disconnected position. The actuating end of the switching mechanism 7 is slidably connected to the second rack 5, and the actuating end of the switching mechanism 7 is adapted to slide along the length direction of the second rack 5. By setting the switching mechanism 7, the movement of the second rack 5 can be easily controlled, allowing it to switch between the connected position and the disconnected position, thus improving the reliability of the spray boom adjustment device. When the second rack 5 is in the connected position, it is used to adjust the height of the spray boom 1. When the second rack 5 is in the disconnected position, the angle of the spray boom 1 is adjusted through the meshing transmission of the first rack 4.

[0037] As an optional implementation, the switching mechanism 7 includes a fixed base 71, a push-pull assembly 72, and a locking assembly 73; the push-pull assembly 72 is slidably disposed on the fixed base 71, and the first end of the push-pull assembly 72 is the actuating end of the switching mechanism 7; the locking assembly 73 includes an elastic locking head 731, which has a first position and a second position. In the first position, the elastic locking head 731 abuts against the locking point to restrict the relative movement of the push-pull assembly 72 and the fixed base 71, so that the second rack 5 is held in the connected position; in the second position, the elastic locking head 731 disengages from the locking point to allow the push-pull assembly 72 to move relative to the fixed base 71, and drives the second rack 5 to move to the disengaged position.

[0038] By setting the elastic locking head 731, the locking point can be pressed against the elastic force to achieve locking. By controlling the movement of the push-pull assembly 72, the second rack 5 can be switched between the connected and disconnected positions. The position of the second rack 5 can be changed simply by pushing or pulling the push-pull assembly 72, and the elastic locking head 731 can ensure that the current position of the second rack 5 is maintained, which is convenient to operate and reliable in operation.

[0039] As an optional implementation, the locking assembly 73 includes a limiting groove 732 that cooperates with the elastic lock head 731. One of the elastic lock head 731 and the limiting groove 732 is disposed on the fixed base 71, and the other of the elastic lock head 731 and the limiting groove 732 is disposed on the push-pull assembly 72. The limiting groove 732 cooperates with the elastic lock head 731, limiting its movement and improving the reliability of the control of the second rack 5 by the switching mechanism 7. During the movement of the push-pull assembly 72, when the elastic lock head 731 encounters the limiting groove 732, under the action of elastic force, the elastic lock head 731 automatically pops out and engages in the limiting groove 732, achieving fixed-point limiting of the second rack 5.

[0040] As an optional implementation method, in this embodiment, reference is made to... Figure 3 The limiting groove 732 is provided in two parts. The limiting groove 732 closer to the second rack 5 corresponds to the connection position of the second rack 5, and the limiting groove 732 farther away from the second rack 5 corresponds to the separation position of the second rack 5. This arrangement can ensure that when the elastic lock head 731 and the limiting groove 732 abut and cooperate, the second rack 5 is kept in the connection position or the separation position, thereby improving the reliability of the switch mechanism 7 in controlling the second rack 5.

[0041] As an optional implementation, the resilient lock head 731 includes a first elastic element 7311 and a top ball 7312, and the push-pull assembly 72 includes a push-pull rod 721 with a guide hole. The first elastic element 7311 and the top ball 7312 are disposed within the guide hole. This arrangement, with the first elastic element 7311 and the top ball 7312 within the guide hole, allows the guide hole to limit and guide the elastic element and the top ball 7312, enabling the top ball 7312 to move along the guide hole, improving the accuracy of the top ball 7312's movement, and thus ensuring the accuracy of the second rack 5's movement.

[0042] As an optional implementation method, in this embodiment, reference is made to... Figure 3 The spray bar adjustment device also includes a housing 8, and a fixing seat 71 for the switching mechanism 7 is disposed on the housing 8. Optionally, the housing 8 serves as the fixing seat 71 for the switching mechanism 7. Specifically, the housing 8 has a through hole through which a push-pull rod 721 slidably passes, and a limiting groove 732 is disposed on the housing 8. The first end of the push-pull rod 721 is connected to the second rack 5.

[0043] As an optional implementation method, refer to Figure 3 In this embodiment, the second end of the push-pull rod 721 is provided with a handle for easy control. The structure of the handle depends on specific needs, such as being a protrusion.

[0044] As an optional implementation, the push-pull rod 721 has a limiting step 7211, and a second elastic element 74 is provided between the limiting step 7211 and the second rack 5. When the elastic locking head 731 is in the first position, the second elastic element 74 is adapted to apply an elastic force to the second rack 5 to keep the second rack 5 in the connected position. By providing the second elastic element 74, when the elastic locking head 731 and the limiting groove 732 abut, the second rack 5 is in the connected position, and the second elastic force applies an elastic force to the second rack 5 to keep the second rack 5 in the connected position, ensuring the reliability and stability of the connection between the second rack 5 and the driving member 3.

[0045] As an optional implementation, the switching mechanism 7 includes a drive cylinder. When the switching mechanism 7 is equipped with a drive cylinder, it has a simple structure, low cost, rapid action, and fast response, enabling precise and rapid switching of the height and angle adjustment process of the spray bar 1.

[0046] As an optional implementation method, refer to Figure 3 In this embodiment, the push-pull rod 721 includes two sections with different diameters: a first push-pull section that slides on the housing 8 and a second push-pull section that connects to the second rack 5. The first and second push-pull sections can be integrally formed or detachably connected, as in this embodiment. Figure 3 As shown, the second connecting section and the first connecting section are detachably connected by threads. The second elastic element 74 includes a spring, which is sleeved on the second push-pull section.

[0047] As an optional implementation, one end of the second push-pull section and the second rack 5 are slidably connected by a sliding mechanism.

[0048] Specifically, in this embodiment, referring to Figure 3 The second rack 5 is provided with a guide member 91 arranged along its length, and one end of the second push-pull section is provided with a sliding member 92 that cooperates with the guide member 91. Specifically, the guide member 91 is a groove, and the sliding member 92 is a slider. Optionally, to ensure the accuracy of the sliding fit, the slider is set as a long sliding rod. Since the push-pull assembly 72 needs to drive the second rack 5 to move during the push-pull process, as an optional implementation, such as... Figure 3 As shown, the guide member 91 and the slider 92 are connected to prevent detachment. Specifically, the groove is a T-shaped groove, and the cross-section of the slider is a T-shaped slider that is adapted to it.

[0049] According to an embodiment of the present invention, in another aspect, the present invention also provides a sanitation vehicle, including a vehicle body and a spray bar adjustment device according to any of the above technical solutions, wherein a first rack 4 and a second rack 5 are disposed on the vehicle body.

[0050] Sanitation vehicles equipped with the aforementioned boom adjustment device possess all the advantages of such devices, which will not be elaborated upon here.

[0051] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A spray bar adjustment device, characterized in that, include: A spray bar (1) is provided with a driven gear (2) fixed on the spray bar (1), and the axial direction of the driven gear (2) is arranged along the length direction of the spray bar (1); The active component (3) is positioned above the spray bar (1); The first rack (4) has its lower part meshing with the driven gear (2) and its upper part connected to the driving member (3). The driving member (3) is adapted to drive the first rack (4) to move up and down to drive the driven gear (2) to rotate, thereby driving the spray bar (1) to rotate around its axis. A movable second rack (5) is provided, the tooth surface of the second rack (5) being disposed opposite to the tooth surface of the first rack (4); the second rack (5) has a connecting position and a disengaging position, in the connecting position, the lower part of the second rack (5) meshes with the driven gear (2), and the upper part of the second rack (5) is connected to the driving member (3), the driving member (3) being adapted to drive the second rack (5) to move up and down, so as to drive the spray bar (1) to move up and down; In the separated position, the second rack (5) is separated from the driven gear (2) and the driving member (3); The driving component (3) includes a screw (31), the screw (31), the first rack (4) and the second rack (5) are parallel.

2. The spray bar adjustment device according to claim 1, characterized in that, One end of the screw (31) is connected to a transmission mechanism (6) that drives the screw (31) to rotate.

3. The spray bar adjustment device according to claim 2, characterized in that, The transmission mechanism (6) includes a transmission shaft (61), a bidirectional ratchet mechanism (62), and a transmission pair (63). The bidirectional ratchet mechanism (62) is connected to the transmission shaft (61) and is adapted to drive the transmission shaft (61) to rotate in both directions. The transmission shaft (61) and the screw (31) are connected by the transmission pair (63).

4. The spray bar adjusting device according to any one of claims 1 to 3, characterized in that, It also includes a switching mechanism (7), the execution end of which is connected to the second rack (5) and is adapted to drive the second rack (5) to switch between the connected position and the separated position. The execution end of the switching mechanism (7) and the second rack (5) are slidably connected, and the execution end of the switching mechanism (7) is adapted to slide along the length direction of the second rack (5).

5. The spray bar adjusting device according to claim 4, characterized in that, The switching mechanism (7) includes a fixed base (71), a push-pull assembly (72), and a locking assembly (73); The push-pull assembly (72) is slidably disposed on the fixed base (71), and the first end of the push-pull assembly (72) is the actuating end of the switching mechanism (7); The locking assembly (73) includes a resilient locking head (731) having a first position and a second position. In the first position, the resilient locking head (731) abuts against a locking point to restrict the relative movement of the push-pull assembly (72) and the fixed base (71), thereby keeping the second rack (5) in the connected position. In the second position, the resilient locking head (731) disengages from the locking point to allow the push-pull assembly (72) to move relative to the fixed base (71) and drive the second rack (5) to the disengaged position. Alternatively, the switching mechanism (7) may include a drive cylinder.

6. The spray bar adjusting device according to claim 5, characterized in that, The locking assembly (73) includes a limiting groove (732) that cooperates with the elastic lock head (731). One of the elastic lock head (731) and the limiting groove (732) is disposed on the fixed base (71), and the other of the elastic lock head (731) and the limiting groove (732) is disposed on the push-pull assembly (72).

7. The spray bar adjusting device according to claim 6, characterized in that, The elastic lock head (731) includes a first elastic element (7311) and a top ball (7312). The push-pull assembly (72) includes a push-pull rod (721). The push-pull rod (721) is provided with a guide hole. The first elastic element (7311) and the top ball (7312) are disposed in the guide hole.

8. The spray bar adjusting device according to claim 7, characterized in that, The push-pull rod (721) has a limiting step (7211), and a second elastic element (74) is provided between the limiting step (7211) and the second rack (5). When the elastic lock head (731) is in the first position, the second elastic element (74) is adapted to apply an elastic force to the second rack (5) so that the second rack (5) is held in the connection position.

9. A sanitation vehicle, characterized in that, The device includes a vehicle body and a spray bar adjustment device according to any one of claims 1 to 8, wherein the first rack (4) and the second rack (5) are disposed on the vehicle body.

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