Expansion joint cutting equipment for roads and bridges

Abstract

The expansion joint cutting equipment for the roads and the bridges comprises a vehicle body, a joint cutting assembly and a spraying assembly, the vehicle body comprises a chassis, the chassis is rotationally connected with walking wheels, one end of the chassis is fixedly connected with a pushing handle, the joint cutting assembly comprises a sliding rod which penetrates through the chassis and is in sliding connection with the chassis, and a cutting machine is installed at the lower end of the sliding rod. A driving device matched with the sliding rod is further installed on the base plate, the spraying assembly comprises a plurality of sets of spraying nozzles rotationally installed on the base plate, the multiple sets of spraying nozzles are arranged on the periphery of the cutting machine, and the spraying nozzles are provided with adjusting devices for adjusting the spraying angle in a matched mode. And meanwhile, the spraying assembly sprays water flow to wash the expansion joint and the cutting blade, the work of dust falling and cooling of the cutting blade is achieved, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to a cutting device for expansion joints of roads and bridges. Background Technology

[0002] In the process of road and bridge pavement construction, in order to overcome the road surface deformation caused by factors such as temperature changes, expansion joints need to be opened at intervals on the road surface. After the expansion joints are cut, flexible and extensible expansion joint material is installed in the joints, and then polyurethane and other materials are used for grouting to ensure the aesthetics and smoothness of the road surface.

[0003] Currently, road joint cutting machines are commonly used in engineering projects for cutting expansion joints. These machines have a rotating diamond saw blade mounted on the machine body for cutting the road surface. A small gasoline or diesel engine is also installed to power the diamond saw blade. Wheels are mounted at the bottom of the machine to move it. Before cutting, workers first mark the road surface, planning the location and width of the expansion joints. During cutting, workers push the road joint cutting machine slowly along the marked line. As the machine moves, the diamond saw blade cuts the road surface, creating the joint. During this process, the high-speed rotating diamond saw blade generates dust and small particles. At this point, other workers need to spray water on the cutting area to reduce dust and cool the diamond saw blade, ensuring smooth cutting operations.

[0004] The current road joint cutting machine has the following problems when performing expansion joint cutting operations: First, the cutting depth of the cutting machine is manually adjusted and controlled by the worker when pushing the road joint cutting machine. The cutting depth is greatly affected by human interference, which can easily cause inconsistent cutting depth of expansion joints and affect the cutting quality. Second, the dust reduction and cooling process requires other workers and spraying equipment as assistance, resulting in low work efficiency. Utility Model Content

[0005] To address the problems existing in the prior art, a road and bridge expansion joint cutting device is provided. The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A road and bridge expansion joint cutting device, comprising:

[0007] The vehicle body includes a chassis, on which wheels are rotatably connected, and a push handle is fixedly connected to one end of the chassis;

[0008] A kerfing assembly includes a sliding rod that passes through and is slidably connected to a chassis. A cutting machine is mounted on the lower end of the sliding rod, and a driving device is also mounted on the chassis, which cooperates with the sliding rod.

[0009] The spray assembly includes several sets of nozzles rotatably mounted on the chassis. The sets of nozzles are arranged around the periphery of the cutting machine. The nozzles cooperate with the cutting machine. Each nozzle is equipped with an adjustment device for adjusting the spray angle of the nozzle.

[0010] Preferably, the traveling wheels include directional wheels and omnidirectional wheels. The directional wheels are symmetrically installed at the end of the chassis near the pusher, and the omnidirectional wheels are symmetrically installed at the end of the chassis away from the pusher.

[0011] Preferably, the driving device includes a rack fixedly mounted on the sliding rod along the length of the sliding rod, a plurality of gears are rotatably connected to the chassis at intervals, and the plurality of gears are meshed with the rack, one of the gears is coaxially fixedly connected to a worm gear, a drive motor is mounted on the chassis, a worm is fixedly mounted on the shaft end of the drive motor, and the worm gear and the worm are meshed with each other.

[0012] Preferably, a guide block is fixedly connected to the chassis, and a sliding groove is formed on the guide block. The sliding rod passes through the sliding groove and slides in contact with the inner wall of the sliding groove.

[0013] Preferably, the guide block is located on the side of the sliding rod away from the gear.

[0014] Preferably, a rocker switch is installed on the pusher, the rocker switch is electrically connected to the drive motor, and the rocker switch is used to control the forward and reverse rotation of the drive motor.

[0015] Preferably, the rocker switch includes a two-way rocker switch.

[0016] Preferably, a limit switch that cooperates with the rocker switch is fixedly installed on the upper surface of the guide block. The limit switch is electrically connected to the drive motor. A triggering device is installed on the sliding rod. The triggering device is located above the limit switch and cooperates with the limit switch.

[0017] Preferably, the limit switch includes a rocker arm type and a plunger type limit switch.

[0018] Preferably, the triggering device includes a U-shaped block, which is engaged with the sliding rod. A trigger plate is fixedly connected to the side wall of the U-shaped block, and the lower surface of the trigger plate is in contact with the contact of the limit switch.

[0019] Preferably, a fastening bolt is threaded through and connected to the U-shaped block, and one end of the fastening bolt abuts against the surface of the sliding rod.

[0020] Preferably, a water tank is fixedly installed on the chassis, and the water tank is connected to a water pump through a pipeline, and the water pump is connected to a nozzle through a pipeline.

[0021] Preferably, the adjustment device includes an adjustment rod and a connecting block. One end of the adjustment rod is fixedly connected to the nozzle. The connecting blocks are symmetrically fixedly connected to the chassis. The other end of the adjustment rod is located between the connecting blocks and is rotatably connected to the connecting blocks. A first toothed ring is fixedly connected to the side of each connecting block near the adjustment rod. A second toothed ring is provided on both sides of the adjustment rod. The first toothed ring meshes with the second toothed ring.

[0022] Preferably, the two connecting blocks and the adjusting rod are provided with through holes, and an adjusting screw is slidably disposed in the through hole. The adjusting screw passes through the through hole, and a wing nut is threaded to one end of the adjusting screw. The wing nut is disposed on the outer side of the corresponding connecting block, and the adjusting rod and the adjusting screw are rotatably connected.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. This utility model includes a slit-cutting assembly for cutting expansion joints. The assembly includes a drive device comprising a rack fixedly mounted on a sliding rod. Several gears are rotatably connected to the chassis at intervals, each meshing with the rack. One gear is coaxially fixedly connected to a worm gear. A drive motor is mounted on the chassis, with a worm fixedly mounted on its shaft. The worm gear meshes with the worm. In use, the drive motor drives the worm to rotate, which in turn drives the worm gear, which in turn drives the coaxially connected gear. The gear and rack work together to raise or lower the sliding rod, adjusting the cutting depth. Furthermore, the worm and worm gear have a self-locking mechanism; when the worm stops rotating, the sliding rod remains stationary due to the interaction between the worm gear and worm, automatically controlling the cutting depth. This design is convenient to use.

[0025] 2. This utility model features a rocker switch on the pusher, electrically connected to the control circuit of the drive motor. By swinging the rocker on the rocker switch, the forward and reverse rotation of the drive motor can be changed, making operation very convenient. Furthermore, a limit switch that works in conjunction with the rocker switch is installed on the upper surface of the guide block. A trigger device is installed on the sliding rod, located above the limit switch. The trigger device and the limit switch work together to control the cutting depth. In use, when the rocker switch is used to control the drive motor to lower the sliding rod and the cutter, the trigger device and the limit switch move closer together. When the designed cutting depth is reached, the trigger device contacts and presses against the contact of the limit switch, cutting off the control circuit of the drive motor and stopping it. This automatically completes the adjustment of the cutting depth. Throughout the process, the operator does not need to constantly monitor the sliding rod and the operation of the cutter, making operation simple and convenient.

[0026] 3. This utility model includes a spray assembly, which comprises a nozzle positioned around the periphery of the cutting machine. When the cutting machine cuts the road surface, the spray assembly sprays water to impact the cutting area and the cutting blade, thereby reducing dust and cooling the cutting blade. This helps protect the environment and improves the cutting efficiency of expansion joints. The nozzle is connected to an adjustment device, which includes an adjustment rod and connecting blocks. The connecting blocks are symmetrically fixedly connected to the chassis. One end of the adjustment rod is fixedly connected to the nozzle, and the other end is located between the connecting blocks and rotatably connected to them. A first toothed ring is fixedly connected to the side of the connecting block closest to the adjustment rod. The adjustment rod has a first toothed ring fixedly connected to both sides. A second gear ring is provided, which meshes with the first gear ring. Additionally, the connecting block and adjusting rod have through holes, within which an adjusting screw slides. The adjusting screw passes through the through hole, and one end of the adjusting screw is threadedly connected to a wing nut, which is located on the outside of the corresponding connecting block. The adjusting rod and adjusting screw are rotatably connected. When the spray angle of the nozzle needs to be adjusted, the wing nut is loosened, and the adjusting rod is rotated to change the spray angle. This provides strong adaptability. After the spray angle is determined, the wing nut is tightened. Under the meshing action of the first and second gear rings, the spray angle of the nozzle can be better maintained, ensuring a better spraying effect. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a side view of the overall structure of this utility model;

[0029] Figure 2 This is a side view of the connection between the chassis and the sliding rod in this utility model;

[0030] Figure 3 This is a top view of the drive device structure in this utility model;

[0031] Figure 4 This is a top view of the connection between the triggering device and the sliding rod in this utility model;

[0032] Figure 5 yes Figure 1 Enlarged cross-sectional view of section A.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100 Chassis; 101 Directional wheel; 102 Universal wheel; 103 Gear; 104 Worm gear; 105 Drive motor; 106 Worm; 107 Guide block; 108 Slide groove; 109 Limit switch; 110 Push handle; 111 Rocker switch; 112 Support plate; 120 Sliding rod; 121 Cutting machine; 122 Rack; 123 Protective cover; 124 Cutting disc; 125 Cutting motor; 130 Nozzle; 132 Water tank; 133 Water pump; 134 Adjusting rod; 135 Connecting block; 136 First gear ring; 137 Second gear ring; 138 Adjusting screw; 139 Wing nut; 140 U-block; 141 Trigger plate; 142 Fastening bolt. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] like Figure 1 As shown, this utility model proposes a road and bridge expansion joint cutting device, which includes:

[0037] The vehicle body includes a chassis 100, on which a traveling wheel is rotatably connected, and a pusher 110 is fixedly connected to one end of the chassis 100.

[0038] The slit cutting assembly includes a sliding rod 120, which passes through the chassis 100 and is slidably connected to the chassis 100. A cutting machine 121 is installed at the lower end of the sliding rod 120. A drive device is also installed on the chassis 100, and the drive device cooperates with the sliding rod 120.

[0039] The spray assembly includes several sets of nozzles 130 rotatably mounted on the chassis 100. The nozzles 130 are arranged around the cutting machine 121 and cooperate with the cutting machine 121. An adjustment device is provided between the nozzles 130 and the chassis 100 to adjust the spray angle of the nozzles 130.

[0040] In this embodiment, the traveling wheels include directional wheels 101 and omnidirectional wheels 102. The directional wheels 101 are symmetrically installed at the end of the chassis 100 near the pusher 110, and the omnidirectional wheels 102 are symmetrically installed at the end of the chassis 100 away from the pusher 110.

[0041] The cooperation between the directional wheel 101 and the omnidirectional wheel 102 facilitates the movement and steering of this device. Expansion joints in bridges and roads are generally designed to be straight. In order to ensure that the vehicle's movement direction remains unchanged during expansion joint cutting operations, in this embodiment, the omnidirectional wheel 102 is selected to be an omnidirectional wheel with a directional key. The directional key plays a locking role. When performing expansion joint cutting operations, pressing the directional key locks the direction of the omnidirectional wheel 102. With the cooperation of the directional wheel 101, the vehicle's forward direction can be kept unchanged. The omnidirectional wheel 102 with a directional key can be easily obtained on the market. In this embodiment, its structure and use will not be described in detail.

[0042] Before use, according to the design plan, draw planning lines on the road or bridge surface. Each expansion joint corresponds to two parallel planning lines. Determine the location and width of the expansion joint based on the planning lines.

[0043] Push the pusher 110, and with the cooperation of the directional wheel 101 and the omnidirectional wheel 102, move the vehicle body to the starting position of the planned line on one side of the expansion joint.

[0044] Start the drive unit, which drives the sliding rod 120 to slide downwards. The sliding rod 120 drives the cutter 121 to move down closer to the road surface. During the downward movement of the cutter 121 or after the cutting blade 124 contacts the road surface, adjust the position and angle of the vehicle body according to the relative position of the cutting blade 124 and the planned line on the road surface. After determining the position and angle, start the cutter 121 and start the spraying assembly.

[0045] After the cutting machine 121 is started, the control drive device drives the sliding rod 120 and the cutting machine 121 to continue to move down. The cutting blade 124 on the cutting machine 121 cuts the road surface. When the cutting blade 124 reaches the set depth, which meets the set depth of the expansion joint, the drive device stops, the sliding rod 120 stops moving down, and the current cutting depth remains unchanged.

[0046] Push the pusher 110 to move the vehicle body and the cutting machine 121 forward along the planned line to the other end of the planned line. The cutting blade 124 on the cutting machine 121 cuts the road surface where the planned line is located.

[0047] While the cutting blade 124 is cutting the road surface, the nozzles 130 in the spray assembly spray water. Part of the water sprayed from the nozzles 130 impacts the cutting blade 124 to cool it down, while the water sprayed from the other nozzles impacts the cut joint to wash the cut surface and reduce dust.

[0048] After reaching the other end of the planned line, stop the cutting machine 121, control the drive device to move the cutting machine 121 upward, and the cutting machine 121 moves the cutting blade 124 off the road surface to complete the cutting work of the expansion joint on that side.

[0049] Adjust the vehicle's position and move it to the starting position of the planned line on the other side of the expansion joint. Repeat the previous operation and continue cutting along the planned line on the other side of the expansion joint until the cutting work of the expansion joint is completed.

[0050] like Figures 1 to 5 As shown in one embodiment of the road and bridge expansion joint cutting device of this utility model,

[0051] The drive device includes a rack 122 fixedly mounted on the sliding rod 120 along its length. A number of gears 103 are rotatably connected to the chassis 100 at intervals. All gears 103 are meshed with the rack 122. One of the gears 103 is coaxially fixedly connected to a worm gear 104. A drive motor 105 is mounted on the chassis 100. A worm 106 is fixedly mounted on the shaft end of the drive motor 105. The worm gear 104 and the worm 106 are meshed with each other.

[0052] A guide block 107 is fixedly connected to the chassis 100. A groove 108 is provided on the guide block 107. A sliding rod 120 passes through the groove 108 and slides in contact with the inner wall of the groove 108.

[0053] The guide block 107 is located on the side of the sliding rod 120 away from the gear 103.

[0054] In this embodiment, support plates 112 are symmetrically arranged on the chassis 100. The lower end of the support plates 112 is fixedly connected to the chassis 100. Gears 103 are arranged between the two support plates 112 and are rotatably connected to the support plates 112. There is a gap between the gears 103. Setting multiple gears 103 helps to increase the contact area with the rack 122, thereby making the sliding rod 120 more stable during the relative sliding process with the guide block 107. In this embodiment, there are two gears 103, and a worm gear 104 is coaxially fixedly connected to the lowermost gear 103. The worm gear 104 and the worm 106 are meshed together.

[0055] Please refer to the attached document. Figure 3 In this embodiment, the cross-section of the sliding rod 120 is I-shaped, and the cross-section of the guide block 107 after the groove 108 is opened is C-shaped. The sliding rod 120 is adapted to the groove 108, and the sliding rod 120 slides up and down along the groove 108. The guide block 107 and the groove 108 can increase the contact area with the sliding rod 120, so that the sliding rod 120 is more stable when sliding, thereby providing better support for the cutting machine 121 and making it more stable when cutting the road surface.

[0056] A rocker switch 111 is installed on the pusher 110. The rocker switch 111 is electrically connected to the drive motor 105 and is used to control the forward and reverse rotation of the drive motor 105.

[0057] In this embodiment, the rocker switch 111 includes a bidirectional rocker switch, and the drive motor 105 is connected to a forward and reverse circuit. The terminals of the bidirectional rocker switch are respectively connected to the forward rotation control circuit and the reverse rotation control circuit of the drive motor 105. When in use, rotating the rocker switch controls the opening and closing of the forward rotation control circuit and the reverse rotation control circuit, thereby realizing the forward and reverse rotation of the drive motor 105, which is convenient to operate.

[0058] The two-way rocker switch, the forward and reverse circuit of the motor, and the connection method between the rocker switch and the forward and reverse circuit can all be easily obtained from the market, and will not be described in detail in this embodiment.

[0059] It should be noted that a limit switch 109 that cooperates with the rocker switch 111 is fixedly installed on the upper surface of the guide block 107. The limit switch 109 is electrically connected to the drive motor 105. A trigger device is installed on the sliding rod 120. The trigger device is located above the limit switch 109 and cooperates with the limit switch 109.

[0060] Limit switches 109 include rocker arm type and plunger type limit switches.

[0061] The triggering device includes a U-shaped block 140, which is engaged with a sliding rod 120. A trigger plate 141 is fixedly connected to the side wall of the U-shaped block 140, and the lower surface of the trigger plate 141 is in contact with the contacts of the limit switch 109.

[0062] A fastening bolt 142 is threaded through and connected to the U-shaped block 140, with one end of the fastening bolt 142 abutting against the surface of the sliding rod 120.

[0063] The fastening bolt 142 serves to fix the U-shaped block 140. Loosening the fastening bolt 142 allows the U-shaped block 140 to slide up and down along the sliding rod 120. Tightening the fastening bolt 142 allows the U-shaped block 140 to remain in its current position due to the contact between the fastening bolt 142 and the surface of the sliding rod 120.

[0064] The interaction between the trigger device and the limit switch 109 is used to set the cutting depth of the cutting seam. During use, when the lower end of the cutting blade 124 contacts the ground, the fastening bolt 142 is loosened, and the U-shaped block 140 slides up and down along the surface of the sliding rod 120. The distance between the lower surface of the trigger plate 141 and the contact of the limit switch 109 is the set cutting depth of the expansion joint.

[0065] In this embodiment, in the initial state, the limit switch 109 remains closed, and the trigger plate 141 is located above the contacts of the limit switch 109, with a gap between the trigger plate 141 and the contacts of the limit switch 109.

[0066] Limit switches are existing technology, and the selection and usage of limit switches can be easily obtained from the market. This embodiment will not elaborate further.

[0067] The forward and reverse rotation of the drive motor 105 respectively causes the sliding rod 120 to slide down and rise. Due to the installation position of the drive motor 105 and the cooperation between the worm gear 104 and the worm 106, there are two correspondences between the forward and reverse rotation of the drive motor 105 and the sliding rod 120 sliding down and rising. These include the forward rotation of the drive motor 105 causing the sliding rod 120 to slide down and the reverse rotation of the drive motor 105 causing the sliding rod 120 to slide down. In this embodiment, the correspondence of the forward rotation of the drive motor 105 causing the sliding rod 120 to slide down is selected.

[0068] In this embodiment, a limit switch 109 is connected to the forward rotation control circuit of the drive motor 105. Initially, the limit switch 109 is closed. At this time, the forward rotation control circuit is controlled by the rocker switch 111. When the rocker switch 111 is swung to close the forward rotation control circuit, the drive motor 105 drives the sliding rod 120 and the cutting machine 121 to descend. The triggering device and the limit switch 109 approach each other. When the designed cutting depth is reached, the trigger plate 141 in the triggering device contacts and presses against the contact of the limit switch 109. The limit switch 109 cuts off the forward rotation control circuit of the drive motor 105. At this time, the rocker switch 111 can no longer control the drive motor 105 to continue to rotate forward, thus automatically completing the adjustment of the cutting depth. During the descent, the operator does not need to constantly observe the operation of the sliding rod and the cutting machine. The operation is simple and convenient.

[0069] When the drive motor 105 is turned off, the worm gear 106 stops rotating. The cooperation between the worm gear 106 and the worm wheel 104 has a self-locking function. With the cooperation of the worm gear 106 and the worm wheel 104, the sliding rod 120 remains stationary in its current position, thereby automatically completing the control of the cutting depth and keeping the current cutting depth unchanged, which is convenient to use.

[0070] A water tank 132 is fixedly installed on the chassis 100. The water tank 132 is connected to a water pump 133 through a pipe. The water pump 133 is connected to the nozzle 130 through a pipe.

[0071] Please refer to Figure 5The adjustment device includes an adjusting rod 134 and a connecting block 135. One end of the adjusting rod 134 is fixedly connected to the nozzle 130. The connecting blocks 135 are symmetrically fixedly connected to the chassis 100. The other end of the adjusting rod 134 is located between the connecting blocks 135 and is rotatably connected to the connecting blocks 135. A first gear ring 136 is fixedly connected to the side of the connecting block 135 near the adjusting rod 134. A second gear ring 137 is provided on both sides of the adjusting rod 134. The first gear ring 136 meshes with the second gear ring 137.

[0072] Two connecting blocks 135 and adjusting rod 134 are provided with through holes. An adjusting screw 138 is slidably installed in the through hole. The adjusting screw 138 passes through the through hole. One end of the adjusting screw 138 is threadedly connected to a wing nut 139. The wing nut 139 is located on the outside of the corresponding connecting block 135. The adjusting rod 134 and the adjusting screw 138 are rotatably connected.

[0073] Please refer to Figure 1 In this embodiment, the nozzles 130 are set in four groups. One nozzle 130 is set on each side of the sliding rod 120. The connecting block 135 in the adjustment device corresponding to each nozzle 130 is symmetrically fixedly connected to the chassis 100. The two nozzles 130 mainly play the role of dust reduction and rinsing the expansion joint, so as to prevent dust and small particles from being dispersed in the air during the cutting process of the cutting blade 124.

[0074] In addition, two nozzles 130 are also provided on the protective cover 123. The connecting block 135 in the adjustment device corresponding to each nozzle 130 is symmetrically fixedly connected to the protective cover 123. The water jets from these two nozzles 130 impact the cutting blade 124, which cools the cutting blade 124 and assists in cutting. Of course, two more nozzles 130 can also be provided on the protective cover 123 on the other side of the cutting blade 124. The installation method is the same as described above, and will not be elaborated further in this embodiment.

[0075] In use, after moving the vehicle body to the starting position of the planned line on one side of the expansion joint, turn the rocker switch 111 to close the forward rotation control circuit and start the drive motor 105. The drive motor 105 drives the worm gear 106 to rotate, the worm gear 106 rotates and drives the worm wheel 104 to rotate, the worm wheel 104 drives the coaxially connected gear 103 to rotate, and with the cooperation of the gear 103 and the rack 122, the rotation of the gear 103 drives the sliding rod 120 to descend.

[0076] After the cutting disc 124 comes into contact with the road surface, loosen the fastening bolt 142 so that the U-shaped block 140 slides up and down along the surface of the sliding rod 120, and adjust the distance between the lower surface of the trigger plate 141 and the contact of the limit switch 109 to the set cutting depth of the expansion joint.

[0077] When the spray angle of the nozzle 130 needs to be adjusted according to actual needs, loosen the wing nut 139 to reduce the meshing force between the first gear ring 136 and the second gear ring 137, rotate the adjusting rod 134, and the rotation of the adjusting rod 134 will drive the nozzle 130 to rotate, thereby changing the spray angle of the nozzle 130. It has strong adaptability.

[0078] Once the spray angle is determined, tighten the wing nut 139 to increase the meshing force between the first gear ring 136 and the second gear ring 137. Under the meshing action of the first gear ring 136 and the second gear ring 137, the spray angle of the nozzle 130 can be better maintained when the machine body vibrates during the cutting process, which helps to ensure the spraying effect.

[0079] After all nozzles 130 are adjusted, start the cutting machine 121 and control the drive motor 105 to drive the cutting machine 121 to continue to move down. The trigger plate 141 and the limit switch 109 approach each other. When the designed cutting depth is reached, the trigger plate 141 contacts and presses against the contacts of the limit switch 109, and the limit switch 109 cuts off the forward rotation control circuit of the drive motor 105.

[0080] When the drive motor 105 is turned off, the worm gear 106 stops rotating. With the cooperation of the worm gear 106 and the worm wheel 104, the sliding rod 120 remains stationary in its current position, thereby automatically completing the control of the cutting depth and keeping the current cutting depth unchanged, which is convenient to use.

[0081] Push the pusher 110 to move the vehicle body and the cutting machine 121 forward along the planned line to the other end of the planned line. The cutting blade 124 on the cutting machine 121 cuts the road surface where the planned line is located.

[0082] While the cutting disc 124 is cutting the road surface, the nozzle 130 sprays water. Part of the water sprayed from the nozzle 130 impacts the cutting disc 124 to cool it down, while the other part of the water sprayed from the nozzle impacts the cut joint to wash the cut surface and reduce dust.

[0083] After reaching the other end of the planned line, stop the cutting machine 121, turn the rocker switch 111 to close the reverse control circuit, drive the motor 105 to rotate in the opposite direction to move the cutting machine 121 upward, and the cutting machine 121 drives the cutting blade 124 to move out of the road surface, completing the cutting work of the expansion joint on this side.

[0084] Adjust the vehicle's position and move it to the starting position of the planned line on the other side of the expansion joint. Repeat the previous operation and continue cutting along the planned line on the other side of the expansion joint until the cutting work of the expansion joint is completed.

[0085] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A road and bridge expansion joint cutting device, characterized in that, It includes: The vehicle body includes a chassis (100), on which a traveling wheel is rotatably connected, and a pusher (110) is fixedly connected to one end of the chassis (100). A slit cutting assembly, the slit cutting assembly including a sliding rod (120), the sliding rod (120) passing through the chassis (100) and slidably connected to the chassis (100), a cutting machine (121) is installed at the lower end of the sliding rod (120), and a driving device is also installed on the chassis (100), the driving device cooperating with the sliding rod (120); The spray assembly includes a plurality of spray heads (130) rotatably mounted on the chassis (100). The plurality of spray heads (130) are arranged around the cutting machine (121). The spray heads (130) cooperate with the cutting machine (121). The spray heads (130) are equipped with an adjustment device for adjusting the spray angle of the spray heads (130).

2. The road and bridge expansion joint cutting equipment according to claim 1, characterized in that, The traveling wheels include directional wheels (101) and omnidirectional wheels (102). The directional wheels (101) are symmetrically installed on the end of the chassis (100) near the pusher (110), and the omnidirectional wheels (102) are symmetrically installed on the end of the chassis (100) away from the pusher (110).

3. The road and bridge expansion joint cutting equipment according to claim 1, characterized in that, The driving device includes a rack (122) fixedly mounted on the sliding rod (120) along the length of the sliding rod (120). The chassis (100) is rotatably connected with a plurality of gears (103) at intervals. All of the gears (103) are meshed with the rack (122). One of the gears (103) is coaxially fixedly connected with a worm gear (104). A drive motor (105) is mounted on the chassis (100). A worm (106) is fixedly mounted on the shaft end of the drive motor (105). The worm gear (104) and the worm (106) are meshed with each other.

4. The road and bridge expansion joint cutting equipment according to claim 3, characterized in that, A guide block (107) is fixedly connected to the chassis (100). A groove (108) is provided on the guide block (107). A sliding rod (120) passes through the groove (108) and slides in contact with the inner wall of the groove (108).

5. The road and bridge expansion joint cutting equipment according to claim 4, characterized in that, A rocker switch (111) is installed on the pusher (110). The rocker switch (111) is electrically connected to the drive motor (105). The rocker switch (111) is used to control the forward and reverse rotation of the drive motor (105).

6. The road and bridge expansion joint cutting equipment according to claim 5, characterized in that, The upper surface of the guide block (107) is fixedly equipped with a limit switch (109) that cooperates with the rocker switch (111). The limit switch (109) is electrically connected to the drive motor (105). A triggering device is installed on the sliding rod (120). The triggering device is located above the limit switch (109) and cooperates with the limit switch (109).

7. The road and bridge expansion joint cutting equipment according to claim 6, characterized in that, The triggering device includes a U-shaped block (140), which is engaged with the sliding rod (120). A trigger plate (141) is fixedly connected to the side wall of the U-shaped block (140), and the lower surface of the trigger plate (141) is in contact with the contact of the limit switch (109).

8. The road and bridge expansion joint cutting equipment according to claim 1, characterized in that, A water tank (132) is fixedly installed on the chassis (100). The water tank (132) is connected to a water pump (133) through a pipeline. The water pump (133) is connected to the nozzle (130) through a pipeline.

9. The road and bridge expansion joint cutting equipment according to claim 1, characterized in that, The adjustment device includes an adjustment rod (134) and a connecting block (135). One end of the adjustment rod (134) is fixedly connected to the nozzle (130). The connecting blocks (135) are symmetrically fixedly connected to the chassis (100). The other end of the adjustment rod (134) is located between the connecting blocks (135) and is rotatably connected to the connecting blocks (135). A first toothed ring (136) is fixedly connected to one side of the connecting blocks (135) near the adjustment rod (134). A second toothed ring (137) is provided on both sides of the adjustment rod (134). The first toothed ring (136) meshes with the second toothed ring (137).

10. A road and bridge expansion joint cutting device according to claim 9, characterized in that, The two connecting blocks (135) and the adjusting rod (134) are provided with through holes. An adjusting screw (138) is slidably disposed in the through hole. The adjusting screw (138) passes through the through hole. One end of the adjusting screw (138) is threadedly connected to a wing nut (139). The wing nut (139) is disposed on the outside of the corresponding connecting block (135). The adjusting rod (134) and the adjusting screw (138) are rotatably connected.

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