A gap filling device with distance measuring linkage and discharge control

Abstract

A road surface crack pouring device with distance measurement and anti-blocking feeding linkage comprises a vehicle body, a front drive shaft, a front wheel, a discharge port and a discharge door. A linkage meter is connected with the front drive shaft chain wheel through a chain to realize distance measurement. A discharge opening and closing assembly drives the discharge door to vertically slide in the door plate guide groove. A limiting anti-turbulent linkage assembly is linked with the discharge handrail rod to make the limiting frame fall to the ground to guide and inhibit overflow, and is automatically reset by a rebound reset assembly. A mixing cavity is matched with a stirring motor and a heating bottom plate for stirring and heating. The pouring stability and crack pouring length statistics can be improved.

Description

Technical Field

[0001] This invention belongs to the field of road maintenance and construction equipment, specifically relating to a crack sealing device with distance measurement and linkage material release control. Background Technology

[0002] In current road crack sealing construction, hand-push crack sealing equipment is often used in conjunction with heated and melted sealing materials to clean, fill, and seal cracks. This type of equipment typically includes a vehicle body, a wheel system, a material receiving chamber, and a heating structure. After the material is melted, it is discharged into the crack through a discharge port. The operator controls the pushing and discharging of the equipment using a handle or linkage mechanism. Because road cracks vary in length and construction pace is greatly affected by road conditions, it is often necessary to estimate and record the workable distance for each application of material on-site to schedule replenishment, control consumption, and calculate project quantities. However, existing equipment relies heavily on manual experience or manual step counting / marking, lacking distance measurement methods linked to the wheel system. This results in inaccurate construction distance statistics, poor traceability, and negatively impacts construction organization and cost management. On the other hand, existing hand-push crack sealing equipment often uses simple opening and closing components or valve structures for material discharge control. When discharging, the material flow is affected by factors such as temperature, viscosity, and road slope, easily leading to unstable discharge, overflow, or deviation from the crack location. Furthermore, the discharge structure and the limiting guide for the discharge position are often independent, requiring the operator to simultaneously control the discharge and adjust the guide or limiting components, resulting in insufficient operational coordination and affecting the uniformity of material distribution and the cleanliness of the site. In addition, if the molten material is not sufficiently stirred in the containment cavity or the temperature control is unstable, localized overheating or underheating can easily occur, leading to fluctuations in material properties, blockage of the discharge port, or disruption of discharge continuity. While some equipment is equipped with heating sources or stirring mechanisms, there are insufficient supporting features in temperature monitoring, abnormal status alerts, and heating safety control, resulting in strong operational dependence and instability and safety issues influenced by human factors. Therefore, existing technologies still need to further improve the measurability and recordability of walking distance in hand-push crack sealing equipment, enhance the coordination between material discharge opening and closing and material discharge position guidance, and improve the stability and safety of the mixing and heating process, so as to better adapt to the needs of continuous on-site operation and quality control. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a joint grouting device with distance-based linkage material release control, which effectively solves the problem that the travel distance during joint grouting construction is difficult to measure accurately, resulting in a lack of reliable basis for material release operations and project quantity statistics.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows:

[0005] A road crack sealing device with distance measurement and anti-clogging material dispensing linkage includes a vehicle body, a front drive axle, front wheels, a material outlet, and a material outlet gate located at the material outlet, and further includes:

[0006] A linkage meter counter is fixedly installed on the vehicle body. The front drive shaft is coaxially rotatable with the front wheel, and a sprocket is provided on the front drive shaft. The linkage meter counter is connected to the sprocket via a chain to measure the distance traveled when the vehicle is moving.

[0007] The discharge opening and closing assembly includes a discharge pull rod, a discharge handrail, a discharge connecting rod, and a door panel guide groove. The discharge door is slidably disposed in the door panel guide groove. The bottom end of the discharge connecting rod is hinged to the discharge door, the upper end of the discharge connecting rod is hinged to the discharge pull rod, the rear end of the discharge pull rod is rotatably connected to the vehicle body, and the discharge pull rod is fixedly connected to the discharge handrail, so as to drive the discharge door to slide in the door panel guide groove through the discharge handrail to realize the opening and closing of the discharge port.

[0008] The limiting anti-turbulence linkage component includes a limiting swing rod, a limiting frame, a limiting connecting rod, a relay corner plate, a limiting linkage rod, and a limiting linkage ring. The limiting swing rod is rotatably connected to the vehicle body via a rotating shaft. The limiting swing rod is hinged to the limiting frame, and the limiting frame is fixedly connected to the limiting connecting rod. The upper part of the relay corner plate is rotatably connected to the vehicle body, and the front and rear of the relay corner plate are respectively hinged to the limiting connecting rod and the limiting linkage rod. The limiting linkage rod is sleeved inside the limiting linkage ring, and the limiting linkage ring is fixedly connected to the discharge handrail. This allows the limiting swing rod to drive the limiting frame to swing relative to the ground to the limiting position or the reset position when the discharge handrail is activated, thereby limiting and guiding the discharge position during the material discharge process to suppress material turbulence and overflow.

[0009] The springback reset assembly includes a springback mounting plate, a reset mounting plate, and a reset spring. The springback mounting plate is fixed to the vehicle body, the reset mounting plate is fixed to the discharge handle, and the two ends of the reset spring are respectively connected to the reset mounting plate and the springback mounting plate to provide reset and springback force to the discharge opening and closing assembly and the limit anti-turbulence linkage assembly.

[0010] A mixing and heating assembly includes a mixing chamber, a fixed cover, a flip cover, a stirring motor, a stirring shaft, a stirring baffle, and a hopper heating base plate. The fixed cover is fixedly installed at the top opening of the mixing chamber, and the flip cover is hinged to the fixed cover to open and close the mixing chamber. The stirring motor is fixedly installed on the fixed cover and is drivenly connected to the stirring shaft. The stirring shaft extends into the mixing chamber, and its lower end is equipped with a stirring base and a stirring baffle to mix the materials within the mixing chamber. The hopper heating base plate is located at the bottom of the mixing chamber. The assembly also includes a gas cylinder receiving chamber for accommodating the gas cylinder, with the gas cylinder's ignition nozzle positioned correspondingly at the hopper heating base plate to heat the mixing chamber.

[0011] Preferably, the linkage meter counter includes a meter counter bracket fixed to the vehicle body, an input shaft rotatably mounted on the meter counter bracket, and a driven sprocket disposed on the input shaft. A drive sprocket is fixedly disposed on the front drive shaft, and the drive sprocket and the driven sprocket are connected by chain drive. The linkage meter counter also includes a counting mechanism coaxially connected to the input shaft. The counting mechanism is disposed inside the housing of the linkage meter counter and performs cumulative counting as the input shaft rotates.

[0012] Preferably, the discharge door is a vertical sliding door, and the door panel guide groove is vertically arranged on both sides of the discharge port. The discharge door slides up and down in the door panel guide groove to open or close the discharge port.

[0013] Preferably, a guide trough is provided below the discharge gate. The guide trough has an inverted triangular flow guiding structure, which is used to collect the material flowing out after the discharge gate is opened and guide it to the predetermined grouting position.

[0014] Preferably, the device further includes a power supply box, a speed controller, a battery, and a charging interface. The speed controller and the battery are both housed inside the power supply box. The speed controller has an output terminal for speed adjustment. The stirring motor is electrically connected to the output terminal via a wiring harness, and the positive and negative terminals of the battery are electrically connected to the power input terminal of the speed controller via wiring harnesses, respectively. The charging interface is fixedly installed on the outer wall of the power supply box and electrically connected to the positive and negative terminals of the battery. The charging interface uses a charging socket of the same type as that used in two-wheeled electric vehicles to allow an external charger to charge the battery.

[0015] Preferably, a fixed cover is provided on the top of the mixing chamber, and the flip cover is hinged to the fixed cover; a flip cover connecting rod is hinged on the flip cover, and a flip cover guide ring is fixedly installed on the vehicle body. The flip cover connecting rod passes through and is sleeved in the flip cover guide ring, so that during the opening and closing process of the flip cover rotating around its hinge point, the flip cover connecting rod is limited and guided by the flip cover guide ring to constrain the opening and closing trajectory of the flip cover.

[0016] Preferably, a chain protection cover is provided on the vehicle body, which covers the chain drive area between the sprocket at the front drive shaft and the linkage meter.

[0017] Preferably, a temperature sensor is installed inside the mixing chamber, and a temperature controller and an alarm are installed on the vehicle body. The temperature sensor is electrically connected to the temperature controller. An electrically controlled shut-off valve is installed on the gas supply pipeline at the gas tank accommodating cavity. The electrically controlled shut-off valve is electrically connected to the temperature controller. The temperature controller is configured to drive the electrically controlled shut-off valve to shut off the gas supply when the temperature sensor detects that the temperature inside the mixing chamber has reached a preset upper limit threshold, and to drive the alarm to sound an alarm when the temperature exceeds a preset alarm threshold.

[0018] Preferably, a pushcart handle is fixedly connected to the rear end of the vehicle body; a steering wheel is provided at the bottom of the rear end of the vehicle body, the steering wheel is rotatably connected to the vehicle body through a steering shaft, the lower end of the steering shaft is connected to a steering bracket, and the steering bracket is fixedly connected to the steering wheel, so that the steering wheel can rotate relative to the vehicle body around the steering shaft to achieve rear-end steering guidance of the vehicle body.

[0019] This invention features a novel structure, ingenious design, and simple and convenient operation, offering the following advantages compared to existing technologies:

[0020] 1. The linkage meter counter is connected to the sprocket on the front drive shaft via a chain, and the meter counter is fixed to the vehicle body. When the front wheel rotates with the front drive shaft, it can stably drive the input shaft of the meter counter and the counting mechanism to accumulate counts. This directly converts the rotation of the walking wheel system into a visual measurement and record of the travel distance, avoiding errors caused by manual estimation and marking. It improves the reliability and consistency of single material feeding construction distance statistics and engineering quantity calculation. The transmission area is protected by a chain guard to enhance safety and durability.

[0021] 2. The discharge gate is vertically slidable within the gate panel guide groove. A transmission chain consisting of the discharge pull rod, discharge handrail, and discharge connecting rod ensures precise transmission of opening and closing actions. Simultaneously, the limit and anti-turbulence linkage component establishes synchronous linkage with the discharge handrail through a multi-bar articulated transmission relationship of "limit linkage ring—limit linkage rod—relay corner plate—limit connecting rod—limit frame / limit swing rod." This allows the operator to complete the opening and closing of the discharge port and the limiting guidance of the discharge position with a single control action. Combined with the inverted triangular guide groove below the discharge gate, it guides the flow of fluid, effectively reducing flow deviation and overflow during discharge, improving discharge stability and site cleanliness. The rebound plate, reset plate, and reset spring form a rebound and reset path, ensuring that the opening, closing, and limit mechanisms automatically reset after release, reducing operational burden and minimizing the risk of misoperation.

[0022] 3. A fixed cover is installed on the top of the mixing chamber, which can be opened and closed by a hinged flip cover. The stirring motor is installed on the fixed cover and drives the stirring shaft to extend into the mixing chamber. The stirring base and stirring baffle at the lower end of the stirring shaft form an effective stirring structure. With the help of the bottom material hopper heating plate and gas tank heating, the material can be continuously heated and uniformly mixed, reducing the risk of poor material discharge caused by material sedimentation and agglomeration. On this basis, a temperature sensor is installed in the mixing chamber and forms a control link with the temperature controller, electric shut-off valve and alarm. When the temperature reaches the threshold, the gas supply can be automatically cut off and an alarm can be issued, improving the controllability and safety of the heating process. At the same time, the power box integrates a battery and speed controller. The stirring motor can be operated at adjustable speed and can be easily recharged through an external charging interface. The arrangement of the push handle and steering wheels at the rear of the vehicle body improves the flexibility of the machine's movement and steering, adapting to the needs of continuous crack sealing operations under different road conditions. Attached Figure Description

[0023] Figure 1 This is an isometric view of a crack filling device with distance-based linkage material feeding control according to the present invention.

[0024] Figure 2 This is a front view of a crack filling device with distance-based linkage material feeding control according to the present invention.

[0025] Figure 3 This is a rear view of a crack filling device with distance-based linkage material feeding control according to the present invention.

[0026] Figure 4 This is a top view of a crack filling device with distance-based linkage material feeding control according to the present invention.

[0027] Figure 5 This is a schematic diagram of the mixing chamber of a crack filling device with distance-based linkage material dispensing control according to the present invention.

[0028] In the attached diagram: 1-Car body, 2-Front drive axle, 3-Front wheel, 4-Limiting swing rod, 5-Limiting frame, 6-Limiting linkage rod, 7-Intermediate angle plate, 8-Limiting linkage rod, 9-Discharge port, 10-Door panel guide groove, 11-Guide groove, 12-Discharge door, 13-Discharge linkage rod, 14-Discharge pull rod, 15-Discharge handrail, 16-Rebound hanging plate, 17-Reset hanging plate, 18-Reset spring, 19-Limiting linkage ring, 2 0-Trolley handle, 21-Gas cylinder containment cavity, 22-Power supply box, 23-Speed ​​controller, 24-Battery, 25-Mixing chamber, 26-Fixed cover, 27-Flip cover, 28-Flip cover linkage rod, 29-Flip cover guide ring, 30-Linkage meter counter, 31-Agitator motor, 32-Agitator shaft, 33-Steering wheel, 34-Chain protection cover, 35-Agitator base, 36-Agitator baffle, 37-Hopper heating base plate. Detailed Implementation

[0029] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] like Figure 1-5As shown, the distance-measuring linkage material discharge control crack sealing device in this embodiment is a hand-push structure. The vehicle body 1 can be made of rectangular tubes / bent steel plates welded into a frame-type load-bearing component, preferably Q235B or equivalent strength carbon steel, with powder coating or hot-dip galvanizing for corrosion protection. It is used to install the mixing heating component, the discharge opening and closing component, the limit anti-turbulence linkage component, and the meter-counting transmission component. The front of the vehicle body 1 is provided with a front drive shaft 2, which is coaxially and fixedly connected to the front wheel 3 or fixedly connected by a key. The front wheel 3 can be a high-temperature resistant and wear-resistant solid rubber wheel or a polyurethane wheel, with a wheel diameter of preferably 200-350mm and a wheel width of preferably 40-80mm, to adapt to the rough road surface of the construction site and provide stable rolling. In order to achieve reliable measurement of the travel distance, the linkage meter counter 30 is fixedly installed on the side of the vehicle body 1. The input shaft and the counting mechanism are set inside. A driven sprocket is fixed on the outside of the input shaft, and a driving sprocket is fixed on the front drive shaft 2. The two sprockets are connected by chain drive. The preferred standard roller chain is 06B / 08B or equivalent. The number of sprocket teeth can be matched within the range of 10-20 teeth to obtain a suitable counting resolution. When the vehicle body 1 is pushed, the front wheel 3 drives the front drive shaft 2 to rotate. The driving sprocket synchronously drives the chain to drive the driven sprocket and the input shaft to rotate. The counting mechanism accumulates the count along with the input shaft and converts it into the travel distance. Since the linkage meter counter 30 is fixed to the vehicle body 1, the measurement benchmark is stable and is not affected by human factors such as the operator's stride and the spacing of the marks. It can directly convert the mechanical link of "wheel system rotation - chain drive - counting accumulation" into traceable distance data, improving the accuracy of crack filling length statistics from the source. In order to improve the reliability of transmission and the safety of use, a chain protection cover 34 is set in the chain drive area. It can be made of 1.0-2.0mm steel plate or engineering plastic molding to cover the exposed parts of the sprocket and chain to prevent sand and gravel intrusion and entanglement risks.

[0031] The discharge control of the device adopts a coordinated method of "discharge gate sliding opening and closing + linkage limit guidance": the discharge port 9 is located at the lower part of the vehicle body 1 and is connected to the flow channel below the mixing chamber 25. The discharge gate 12 is a vertical sliding gate structure. The door plate guide groove 10 is fixed vertically on both sides of the discharge port 9. The discharge gate 12 slides up and down in the door plate guide groove 10 to complete the opening and closing. The guide groove and the door plate can be clearance fit and wear-resistant lining such as PTFE / nylon lining strip is set on the contact surface to reduce the probability of jamming in the sticky environment. The bottom end of the discharge connecting rod 13 is hinged to the discharge gate 12 and the top end is hinged to the discharge pull rod 14. The rear end of the discharge pull rod 14 The discharge pull rod 14 is rotatably connected to the vehicle body 1 via a rotating shaft, and the discharge handle rod 15 is fixed as a whole. When the operator holds the discharge handle rod 15 and swings / presses it down, the force is transmitted through the "handle rod - pull rod - connecting rod", which causes the discharge gate 12 to produce a stable up and down displacement along the door panel guide groove 10, thereby realizing the rapid switching of the opening degree of the discharge port 9. A guide groove 11 is set below the discharge gate 12. The cross-section of the guide groove 11 is an inverted triangular flow guiding structure, which can be V-shaped or approximately V-shaped. A concentrated flow stream is formed at the bottom of the groove, so that the material is converged and guided to the predetermined drop position above the crack after flowing out of the discharge port 9, reducing the spread of pollution.

[0032] To address the common problems of material overflow, deviation, and the need for repeated alignment during discharge, this device integrates the limiting guide with the discharge opening and closing mechanism: the limiting swing rod 4 is rotatably connected to the vehicle body 1 via a rotating shaft, and its outer end is hinged to the limiting frame 5. The limiting frame 5 can serve as a ground-based limiting component, and its lower edge can be fitted with a wear-resistant plate or a curved edge to adapt to the ground. The limiting frame 5 is fixedly connected to the limiting connecting rod 6, which is then hinged to the front side of the relay angle plate 7. The upper part of the relay angle plate 7 is rotatably connected to the vehicle body 1 to form a relay swing arm, and its rear side is hinged to the limiting linkage rod 8. The limiting linkage rod 8 is sleeved inside the limiting linkage ring 19, and the limiting linkage ring 19 is fixed to the discharge handrail 15. When the operator drives the discharge handle 15 to open or close the discharge gate 12, the limit linkage ring 19 synchronously drives the limit linkage rod 8 to generate relative movement. The force transmission direction is changed and the displacement is amplified / converted through the relay angle plate 7, and finally the limit linkage rod 6 drives the limit frame 5 to swing around the limit swing rod 4 to the limit position or the reset position. In the limit position, the limit frame 5 forms a limit guide boundary that is close to or abuts against the ground, so that the discharge stream of the guide trough 11 is geometrically constrained and falls more concentratedly into the crack area, thereby reducing the turbulent overflow of material and improving the consistency of material discharge. In the reset position, the limit frame 5 is raised, which facilitates the transfer and obstacle avoidance.

[0033] To ensure that the above-mentioned opening, closing and limit linkage actions have a clear return torque and reduce the operator's burden, the spring-loaded hanging plate 16 is fixed to the vehicle body 1, the reset hanging plate 17 is fixed to the discharge handrail 15, and the two ends of the reset spring 18 are connected to the reset hanging plate 17 and the spring-loaded hanging plate 16 respectively, forming a spring-loaded reset path of "handrail - spring - vehicle body". After the operator releases the hand, the reset spring 18 provides a spring force to make the discharge handrail 15 return to the initial angle. At the same time, the limit linkage ring 19 drives the limit frame 5 to reset. From the principle of mechanism, "single control point control of opening and closing + limit and automatic return" is realized to avoid leakage or material sticking caused by forgetting to reset after opening and closing. Regarding the mixing and heating components, the mixing chamber 25 is used to contain sealant and other grouting materials. It can be made of high-temperature resistant metal, such as 304 stainless steel or carbon steel with a high-temperature resistant coating on the inner wall. The volume can be designed according to the commonly used single-barrel / half-barrel configuration on site, for example, in the range of 20-60L. A fixed cover 26 is fixedly installed at the top opening. The flip cover 27 is hinged to the fixed cover 26 for material feeding and maintenance. In order to stabilize the opening and closing trajectory of the flip cover 27 and avoid hinge vibration under high temperature environment, a flip cover connecting rod 28 is hinged on the flip cover 27. The flip cover guide ring 29 is fixed on the vehicle body 1. The flip cover connecting rod 28 passes through and is sleeved in the flip cover guide ring 29. When the flip cover 27 rotates around the hinge, the guide ring 29 limits and guides the connecting rod 28, thereby constraining the opening and closing path of the flip cover 27, reducing lateral swing and improving the consistency of closing positioning.

[0034] The mixing system is driven by a stirring motor 31, which is fixedly mounted on a fixed cover 26 and connected to a stirring shaft 32 via a coupling or key. The stirring shaft 32 extends into the mixing chamber 25, and a stirring base 35 and a stirring baffle 36 are provided at the lower end to form the mixing section. The baffle can be a symmetrical blade or toothed structure, and the material can be high-temperature resistant steel, to continuously agitate the molten material, reduce local overheating and sedimentation, reduce the risk of material blockage, and make the output viscosity more uniform. The stirring motor 31 can be a DC geared motor or a DC brushless motor, with a rated voltage preferably of 12V / 24V and a rated power range of 60-300W. The optimal stirring speed after deceleration is 20-80 rpm to balance stirring intensity and energy consumption. The power supply section is equipped with a power box 22, which houses a battery 24 and a speed controller 23. The output terminals of the speed controller 23 are electrically connected to the stirring motor 31 via a wiring harness, and the positive and negative terminals of the battery 24 are electrically connected to the power input terminals of the speed controller 23 via a wiring harness, thereby enabling the adjustment of the stirring speed to adapt to different temperature and viscosity conditions. A charging interface is provided on the outer wall of the power box 22. The charging interface is electrically connected to the positive and negative terminals of the battery 24 and uses the same type of charging socket as two-wheeled electric vehicles, which facilitates the use of a universal charger for quick power replenishment on the construction site and reduces downtime waiting.

[0035] Regarding the heating system, the silo heating base plate 37 is located at the bottom of the mixing chamber 25 and makes heat transfer contact with the bottom wall of the mixing chamber 25. A gas cylinder receiving cavity 21 is provided on the vehicle body 1 for fixing the gas cylinder. The ignition nozzle of the gas cylinder is arranged below the silo heating base plate 37 to form a combustion heating zone, so that the base plate 37 heats the mixing chamber 25. To improve the controllability and safety of the heating process, a temperature sensor is installed in the mixing chamber 25, which can be a K-type thermocouple or an NTC probe, with a preferred temperature resistance of ≥250℃. A temperature controller and an alarm are installed on the vehicle body 1. The temperature sensor is electrically connected to the temperature controller. An electrically controlled shut-off valve is installed on the gas supply pipeline and is electrically connected to the temperature controller. When the temperature reaches the preset upper limit threshold, the temperature controller drives the electrically controlled shut-off valve to close the gas supply to suppress overheating. When the temperature exceeds the alarm threshold, the alarm is activated to issue an audible / visual alarm. Thus, without introducing a complex control system, a basic closed loop of "detection-control-shutdown-prompt" is formed, reducing material overheating and deterioration or safety hazards caused by human negligence.

[0036] Through the above-mentioned structural combination of "walking chain drive distance measurement, integrated handrail opening and closing and limit linkage, and coordinated and controllable stirring and heating", this device can reliably measure the distance of crack filling, stably guide the material feeding process, and uniformly control the material state without adding too many operation steps. This allows readers to clearly understand its structural composition, assembly relationship and working principle. Manufacturers can also complete the processing, assembly and mass production based on the above-mentioned component material selection, typical size range and electrical specifications.

[0037] In this embodiment, to ensure a stable mechanical reference for distance measurement and adaptability to working conditions such as dust, vibration, and occasional impacts at the construction site, the linkage meter counter 30 preferably adopts a configuration of "fixed vehicle body + shaft input + chain drive + enclosed counting shell". Specifically, the meter counter bracket is fixedly mounted on the side or front reinforcing beam of the vehicle body 1. The bracket can be made of steel plate bending parts or welded steel sections with a thickness of 3mm or more. The bracket and the vehicle body 1 are preferably connected by bolts and secured with spring washers or nylon lock nuts to prevent loosening. A bearing seat is provided on the bracket, and the input shaft is rotatably mounted in the bearing seat through the bearing. The bearing can be a 6001 / 6002 type deep groove ball bearing or a sealed bearing of the same specification to adapt to the dusty environment. A driven sprocket is fixedly mounted on the outer end of the input shaft, and a driving sprocket is fixedly mounted on the front drive shaft 2. The driving sprocket and the driven sprocket are connected by a standard roller chain drive. Choose model 06B or 08B. The sprocket material can be 45# steel, heat-treated and surface-blackened or galvanized for rust prevention. The number of sprocket teeth can be selected according to the counting resolution requirements. For example, a 12-tooth drive sprocket and a 12-tooth driven sprocket can be used for a 1:1 transmission, or a 10-tooth drive sprocket and a 20-tooth driven sprocket can be used for a 1:2 reduction transmission. This allows adjustment of the counting mechanism's speed range without changing the wheel diameter. The chain tension can be finely adjusted through the elongated hole in the meter counter bracket or the tensioning seat, so that the chain deflection in the middle is controlled within a reasonable range of 3-8mm, avoiding both excessive looseness causing tooth breakage and excessive tightness increasing the bearing load. The counting mechanism of the linkage meter counter 30 is housed within the casing. The casing can be made of die-cast aluminum alloy or injection-molded engineering plastic and equipped with a sealing ring to isolate the counting mechanism from external mud and sand. The counting mechanism can be implemented in one of two forms: a mechanical gear counter or an electronic counter with rotary encoding. When using a mechanical gear counter, the input shaft is coaxial with the main gear of the counter or driven by a pinion gear, and the counting window outputs the cumulative number of revolutions or the cumulative distance. When using an electronic counter, a magnet can be installed at the end of the input shaft, and a Hall sensor or photoelectric encoder is installed inside the casing. This works in conjunction with a microcontroller to count and drive the display screen to show the cumulative distance and single mileage. The display resolution can be set to 0.1m or 1m. Regardless of whether a mechanical or electronic form is used, distance conversion and calibration can be completed by combining "wheel diameter parameters + chain drive ratio + counting resolution". For example, if the diameter of the current wheel 3 is 300mm, its circumference is approximately 0.942m. If the chain drive ratio is 1:1 and the counting mechanism counts once per revolution, then the distance corresponding to one revolution of the front wheel 3 is approximately 0.942m, and the cumulative distance corresponding to N revolutions of the counting mechanism is approximately 0.942N. m; if a 1:2 transmission is used, each revolution of the counting mechanism corresponds to half a revolution of the front wheel, and the conversion coefficient is adjusted accordingly. In actual production, the linkage meter counter 30 can be calibrated before leaving the factory: push it 10m on a flat ground, read the count value and fine-tune the sprocket gear ratio or software coefficient to control the error within ±1%, so that the "single feeding construction distance statistics" have repeatability and engineering usability.To prevent the counter from loosening, misaligning, or accumulating errors during vibration, the counter bracket is preferably equipped with positioning ribs or positioning pin holes, and the outer end of the input shaft and the driven sprocket are connected by a key or double-locked with a set screw; rubber damping pads can be added between the counter housing and the bracket to reduce the transmission of high-frequency vibration and extend the life of the counting mechanism.

[0038] In the discharge control section, this embodiment adopts a vertical sliding door opening and closing method to achieve more intuitive and anti-adhesion interception control of high-viscosity sealant material. The discharge port 9 is located at the lower part of the vehicle body 1 and is connected to the flow channel below the mixing chamber 25. The door panel guide groove 10 is fixed vertically on both sides of the discharge port 9. The guide groove can be made of U-shaped or C-shaped profile, preferably stainless steel or wear-resistant steel plate. Wear-resistant lining strips or polytetrafluoroethylene sliding strips can be installed on the inner wall of the guide groove to reduce friction. The discharge door 12 is a flat door body with a thickness of 3-6mm. It can be made of stainless steel plate or wear-resistant steel plate. A 0.5-1.5mm assembly gap is maintained between the two sides of the door body and the guide groove so that it can still slide smoothly without jamming when there is a small amount of adhesive adhering. The upper end of the discharge gate 12 is connected to the discharge connecting rod 13 via a hinge point. The upper end of the discharge connecting rod 13 is hinged to the discharge pull rod 14. The rear end of the discharge pull rod 14 is rotatably connected to the vehicle body 1 and fixed to the discharge handrail 15 to form a control lever. When the operator pushes or presses down the discharge handrail 15, the discharge pull rod 14 swings around its rear end pivot. The swing is converted into the linear lifting and lowering displacement of the discharge gate 12 through the discharge connecting rod 13. The force transmission link of this "lever-connecting rod-sliding gate" has clear geometric constraints, which can achieve rapid opening and closing within a short stroke. Moreover, by changing the swing angle of the discharge handrail 15, the discharge gate 12 can be in a half-open state, thereby roughly adjusting the effective opening area of ​​the discharge port 9 to adapt to the material release rhythm under different crack widths, material viscosities, and pushing speeds. To improve the interception effect, a heat-resistant sealing strip or a metal bonding surface can be set on the mating surface of the discharge gate 12 and the discharge port 9. When the discharge gate 12 moves down to the closed position, it will block the discharge port 9. Due to the vertical sliding structure, when closed, the weight of the gate body and the rebound force of the pull rod work together to reduce the phenomenon of "backflow and leakage" that traditional plug valves are prone to under high viscosity materials, and improve the cleanliness and safety during the stop and transfer process.

[0039] To further concentrate the material's impact point and reduce spillage, this embodiment includes a guide trough 11 below the discharge gate 12. The guide trough 11 has an inverted triangular cross-section, meaning it is wider at the top and narrower at the bottom, with the inner two sides converging to form a pointed or narrow outlet. The guide trough 11 can be formed by bending and welding 2-4mm thick stainless steel plates, with the slope angle preferably between 30° and 60°. The lower opening of the guide trough 11 is located within the vertical projection range of the discharge port 9 or slightly offset from the center of the crack. This ensures that after the material flows out of the discharge port 9, it is first gathered and collected by the slope of the guide trough 11, forming a more stable flow stream and reducing splashing and lateral diffusion caused by the material falling freely in the air. For high-temperature hot-melt grouting materials, the guide trough 11 can also serve as a short-distance heat buffer channel, reducing the temperature drop and stringing phenomenon at the outlet. The inner surface of the guide trough 11 can be polished or coated with a high-temperature resistant non-stick coating to reduce adhesive residue buildup. In actual use, the operator pushes the vehicle body 1 and adjusts its posture according to the crack direction. The opening of the discharge gate 12 is controlled by the discharge handle 15. After the material enters the guide trough 11 through the discharge port 9, it is guided to the crack position, forming a material discharge effect of "clear opening and closing interception, controllable landing point, and reduced spillage". Combined with the real-time accumulation of the travel distance by the aforementioned linkage meter 30, the construction personnel can obtain quantifiable data of "filled crack length" in the same operation process, thus forming a stable basis for material consumption management, process connection and construction record. At the same time, the structural cooperation between the vertical sliding door and the inverted triangular guide trough reduces the probability of secondary cleaning and rework caused by material adhesion and overflow, reduces the dependence on experience in on-site operation, and allows the manufacturer to achieve stable mass production and assembly consistency by only relying on the above-mentioned component materials, typical size range, fit clearance, transmission ratio and calibration method.

[0040] In this embodiment, to ensure a stable power supply for the mixing drive, facilitate on-site power replenishment, and reduce the professional requirements of the electrical system for construction personnel, the device is equipped with a power supply box 22 as an electrical integrated unit. The power supply box 22 preferably uses a thin metal sheet enclosure or a flame-retardant engineering plastic enclosure (such as ABS with a flame-retardant rating of V0), and is fixed to the side or rear of the vehicle body 1 with bolts. The enclosure shell is equipped with sealing strips and a locking structure to provide basic dust and splash protection. The power supply box 22 integrates a battery 24 and a speed controller 23. The battery 24 can be a lead-acid battery or a lithium battery pack, taking into account the large temperature difference at the construction site and cost considerations. For the mixing motor 31, a 12V or 24V system is preferred, and the capacity can be selected within the range of 12Ah-40Ah. For example, a 12V 20Ah system can meet the typical operating requirements of the mixing motor 31 for continuous operation at low and medium speeds for 2-6 hours. If a 24V system is used, the current at the same power can be reduced and the voltage drop of the wiring harness can be reduced. The speed controller 23 can be a DC PWM speed controller or a brushless motor controller (matching the type of the mixing motor 31). Its rated current is preferably not less than 1.5 times the rated current of the motor (for example, if the motor is rated at 10A, the controller is rated at ≥15A) to cover the starting current and the transient load during high viscosity mixing. The speed controller 23 is equipped with a power input terminal and a speed control output terminal. The positive and negative terminals of the battery 24 are connected to the power input terminal of the speed controller 23 through a heat-resistant and wear-resistant wire harness. The cross-sectional area of ​​the wire harness is preferably 2.5-6mm² and is equipped with cold-pressed terminals and an insulating sleeve to reduce contact resistance and heat generation. The stirring motor 31 is connected to the output terminal of the speed controller 23 through a wire harness. The speed controller 23 adjusts the speed of the stirring motor 31 by changing the duty cycle of the output PWM. The operator can adjust the stirring intensity according to the viscosity of the material, the heating state, and the discharge rhythm. For example, a lower speed is used in the early stage of heating to reduce splashing and energy consumption, and the speed is increased after the material melts to enhance uniform mixing. Thus, "adjustable speed stirring" is achieved at the electrical level to match the mixing and heating process and reduce the risk of poor discharge caused by local overheating and sedimentation. To facilitate rapid on-site power replenishment, a charging interface is installed on the outer wall of the power supply box 22. The charging interface is directly electrically connected to the positive and negative terminals of the battery 24 and preferably connected in series with a fuse or a self-resetting fuse (e.g., in the range of 15A-30A) to provide basic protection in case of charging or short circuit abnormalities. The charging interface adopts the same type of charging socket as two-wheeled electric vehicles, allowing construction parties to directly use common electric vehicle chargers to complete the power replenishment, reducing the supporting costs and the usage threshold. The charger output parameters can be matched with the battery 24 (e.g., 14.4V constant voltage charging for 12V lead-acid and 28.8V constant voltage charging for 24V system), which facilitates the manufacturer to form a standardized supply solution.

[0041] Regarding the opening and closing structure of the mixing chamber 25, the fixed cover 26 is fixedly installed at the top opening of the mixing chamber 25. The fixed cover 26 can serve as a motor mounting and sealing support base. Its connection with the mixing chamber 25 can be achieved by bolt flange connection or circumferential clamp connection, and a heat-resistant sealing gasket (such as a silicone gasket or asbestos rubber gasket) is provided on the contact surface to reduce the escape of hot melt material vapor and odor. The flip cover 27 is connected to the fixed cover 26 by a hinge. The hinge shaft can be a stainless steel pin shaft with a cotter pin limiter to ensure reliable rotation even under long-term high temperature conditions. To prevent the flip cover 27 from lateral swaying, rebounding, or accidental collisions during opening or closing, this embodiment sets up a guide constraint structure with the flip cover connecting rod 28 and the flip cover guide ring 29: one end of the flip cover connecting rod 28 is hinged to the flip cover 27, and the other end passes through and is sleeved in the flip cover guide ring 29 along its length. The flip cover guide ring 29 is fixedly installed at the corresponding position of the vehicle body 1, so that when the flip cover 27 rotates around the hinge, the flip cover connecting rod 28 is constrained and guided in the guide ring 29 to form a relatively stable motion trajectory. This structure is equivalent to adding a "guide sliding pair" to the flip cover 27, which can improve the controllability and repeatability of the flip cover opening and closing without adding complex latches, reduce problems such as pinching, collision, or poor sealing caused by the cover shaking during high-temperature operation, and facilitate manufacturers to achieve mass production using conventional sheet metal parts and pins.

[0042] Furthermore, given that the linkage meter counter 30 and the front drive shaft 2 are connected by a chain drive, there are risks of sand and gravel splashing, mud pollution, and clothing entanglement at the construction site. Therefore, this embodiment includes a chain protection cover 34 on the vehicle body 1 to cover and protect the sprocket and chain drive area. The chain protection cover 34 can be made of bent steel plate or impact-resistant plastic shell. Its fixing method is preferably screw + rivet nut or quick-release buckle structure, ensuring both the rigidity of the cover and facilitating disassembly for routine maintenance to check chain tension and lubrication. Inspection holes or ventilation holes can be reserved near the chain to facilitate heat dissipation and waste removal. Through the modular integration of the power supply box 22, the charging interface compatible with universal electric vehicle standards, the guide constraint opening and closing structure of the flip cover 27, and the safety protection configuration of the chain protection cover 34, this device not only ensures the stability and reliability of key actuators (mixing motor 31, metering transmission link), but also further improves the convenience and safety of on-site use. It enables the whole machine to achieve sustainable operation in the complex environment of road maintenance, and provides manufacturers with a clear assembly path and a range of standard parts that can be purchased, facilitating manufacturing according to drawings and large-scale production.

[0043] In this embodiment, to improve the controllability and safety of the mixing and heating process, and to ensure that the hot-melt material maintains stable fluidity within a suitable temperature range, a temperature sensor is installed inside the mixing chamber 25, and a temperature controller and alarm are installed on the vehicle body 1. The temperature sensor is electrically connected to the temperature controller, thereby enabling real-time acquisition and feedback of the actual temperature inside the mixing chamber 25. The temperature sensor can be selected from either a K-type thermocouple probe or a PT100 platinum resistance probe, depending on cost and temperature resistance requirements. When using a K-type thermocouple, the probe's temperature resistance range can reach 0-400℃, suitable for rapid temperature measurement in gas heating environments. When using a PT100, a three-wire connection method is preferred to reduce measurement errors caused by wire resistance, and the temperature resistance range can cover 0-250℃, meeting the process temperature requirements of most hot-melt grouting materials. The preferred installation method for the temperature sensor is "insertion-type or wall-mounted": for example, a threaded mounting hole is opened on the side wall of the mixing chamber 25, and a high-temperature resistant sleeve is used to insert the probe into the chamber 10-30mm, so that the probe tip is located in the main flow area of ​​the material, avoiding distortion due to only measuring the wall temperature; or the probe is attached to the bottom of the mixing chamber 25 and thermal conductivity is enhanced by thermal grease, so as to reflect the temperature rise caused by the heating of the bottom plate in a timely manner. The temperature controller can be a common industrial temperature controller or a small temperature control module (rated voltage matched with the power supply system, such as 12V / 24V power supply, or a separate DC-DC module power supply), which has temperature display, threshold setting and relay output / drive output functions; the alarm can be an integrated sound and light buzzer (such as 12V / 24V, 80-100dB, LED flashing prompt), and installed near the trolley handle 20 or in a visible area outside the power box 22, so that the operator can detect abnormalities in a timely manner during the pushing operation. The threshold setting of the temperature controller can be selected in conjunction with the application temperature range of commonly used hot melt sealants. For example, the upper threshold can be set in the range of 180-220℃, and the alarm threshold can be set 10-30℃ above the upper threshold to balance material flowability and safety margin. This threshold does not have to be fixed. Manufacturers can set it within a certain range by using buttons / knobs according to the instruction manual of the matching material or user needs, so as to achieve compatibility with different material systems.

[0044] To ensure the temperature control signal effectively constrains the heating source, this embodiment includes an electrically controlled shut-off valve on the gas supply pipeline at the gas tank's accommodating cavity 21. This valve is electrically connected to the temperature controller. The electrically controlled shut-off valve can be a normally closed solenoid valve or an electric ball valve, preferably a normally closed type, meaning it automatically closes in the absence of power or under abnormal conditions to meet on-site safety requirements. Its pressure and temperature resistance specifications can be selected according to the liquefied petroleum gas / natural gas pipeline, for example, a rated pressure of 0.5-1.6 MPa and an operating temperature of -20℃ to +80℃. The valve body material is preferably brass or stainless steel, and quick-connect fittings or threaded fittings are provided at the inlet and outlet for easy maintenance and replacement. After receiving a signal from the temperature sensor, the temperature controller outputs a control signal to de-energize and close the electrically controlled shut-off valve when the temperature inside the mixing chamber 25 reaches a preset upper limit threshold, thereby cutting off the gas supply and suppressing further temperature rise. When the temperature drops to the hysteresis threshold (e.g., a drop of 5-20°C), the gas supply can be restored (if the controller has a hysteresis setting function) to avoid frequent valve opening and closing. If the temperature continues to rise and exceeds the alarm threshold, the temperature controller synchronously drives the alarm to issue an audible and visual alarm, prompting the operator to check the combustion status, material loading, or lid sealing status, thus forming a closed-loop control path of "temperature measurement—judgment—shutdown—alarm". The significance of this closed-loop control is twofold: firstly, it reduces reliance on operator experience, avoiding prolonged heating that could lead to material overheating and deterioration, increased smoke, or safety risks; secondly, by automatically cutting off the gas supply, it reduces the probability of neglecting fire source control due to being busy pushing and discharging materials, thus improving the safety and stability of on-site operations. In actual production, to further improve reliability, a manual valve can be installed in front of the electrically controlled shut-off valve as a redundant shut-off method in the gas supply pipeline, and oil-resistant and gas-resistant hoses and clamps can be installed before and after the electrically controlled shut-off valve to prevent loosening due to vibration.

[0045] Regarding the overall mobility, a trolley handle 20 is fixedly connected to the rear end of the vehicle body 1. The trolley handle 20 can be made of round or square tubes welded into a U-shaped or gate-shaped structure (e.g., outer diameter 25-32mm, wall thickness 1.5-2.5mm), and the grip area is covered with a wear-resistant and non-slip rubber sleeve to improve the feel and heat insulation effect. A steering wheel 33 is set at the bottom of the rear end of the vehicle body 1. The steering wheel 33 is rotatably connected to the vehicle body 1 through a steering shaft. The lower end of the steering shaft is connected to a steering bracket, and the steering bracket is fixedly connected to the steering wheel 33, so that the steering wheel 33 can rotate freely relative to the vehicle body 1 around the steering shaft to achieve rear-end steering guidance. The steering wheel 33 is preferably a heavy-duty swivel caster or a caster assembly with a ball bearing turntable. Its wheel diameter can be selected from 125-200mm, and the rated load can be selected from 100-300kg to meet the total mass bearing capacity after the mixing chamber is fully loaded, the gas tank is loaded, and the power supply box is assembled. The steering bracket is preferably made of galvanized steel sheet stamping or cast steel. Ball bearings or roller bearings are set at the steering turntable to reduce steering resistance. Since the front wheel 3 mainly bears the straight rolling and metering reference, and the rear steering wheel 33 is responsible for directional adjustment, the operator can achieve the steering of the whole machine by applying a deflection torque through the push handle 20. Especially when the crack direction changes or the construction site is moved, the direction of travel can be quickly adjusted. At the same time, the steering wheel 33 is located at the rear end below the discharge handle 15, so that the operator can control the material discharge and also take into account the walking guidance, making the overall operation more centralized. Through the combination of the above-mentioned closed-loop temperature control structure and the rear steering support structure, this device can achieve more stable temperature management and safety protection during the heating process of hot melt materials, and maintain good pushing and steering performance in road maintenance environments. It ensures that the ranging, feeding, mixing and heating processes can operate continuously and collaboratively on the same equipment, making it convenient for manufacturers to purchase standard parts (temperature controller, thermocouple, solenoid valve, casters) and complete assembly production according to the modular approach.

[0046] When using this device, ① first, place the gas cylinder in the gas cylinder receiving cavity 21 and fix it in place. After checking that the gas supply line and the electrically controlled shut-off valve are reliably connected, turn on the gas source, close the power box 22 and confirm that the battery 24 has sufficient power and the charging interface is not loose. Then, open the flip cover 27, add the grouting material into the mixing chamber 25, and close the flip cover 27, so that the flip cover connecting rod 28 completes the closing under the constraint of the flip cover guide ring 29; ② start the stirring motor 31, the stirring shaft 32 drives the stirring base 35 and the stirring baffle 36 to stir and mix the material. At the same time, ignite the lighter nozzle to heat the heating base plate 37 of the hopper. The temperature sensor detects the temperature in the mixing chamber 25 in real time and transmits the signal to the temperature controller. When the temperature reaches the preset upper limit threshold, the temperature controller drives the electrically controlled shut-off valve to automatically shut off the gas supply. When the temperature exceeds the alarm threshold, the alarm prompts the operator to check and adjust; ③ after the material reaches a workable molten state, the operator holds the trolley handle 20 and pushes the trolley body 1, so that the front wheel 3 drives the trolley body 1. The front drive shaft 2 rotates and is driven by the chain to connect with the meter counter 30 to accumulate the travel distance. When it encounters a crack, the discharge handle 15 applies force to drive the discharge pull rod 14 and the discharge connecting rod 13 to drive the discharge gate 12 to move upward in the door guide groove 10 and open the discharge port 9. The material flows through the guide groove 11 and is guided to the crack position. At the same time, the discharge handle 15 drives the limit linkage ring 19 to drive the limit swing rod 4 to make the limit frame 5 swing to the limit position to suppress turbulent overflow. ④ When it is necessary to pause or end the material discharge, release the discharge handle 15. The material handle 15, under the action of the return spring 18, closes the discharge door 12 and causes the limit frame 5 to be reset and lifted through the return hanging plate 17 and the rebound hanging plate 16. When continuing to push or transferring, the steering wheel 33 at the bottom of the rear end of the vehicle body 1 rotates around the steering vertical axis to adjust the direction. After the operation is completed, turn off the air source and disconnect the power. If necessary, use the two-wheeled electric vehicle standard charger through the charging interface to charge the battery 24. After the remaining material in the mixing chamber 25 is processed and cleaned, open the flip cover 27 for maintenance.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A road surface crack sealing device with distance measurement and anti-clogging material dispensing linkage, characterized in that, Including the vehicle body (1), front drive axle (2), front wheels (3), discharge port (9) and discharge gate (12) located at the discharge port (9), and also including: Linkage meter counter (30), the linkage meter counter (30) is fixedly installed on the vehicle body (1), the front drive shaft (2) is coaxially rotatably arranged with the front wheel (3), and a sprocket is provided on the front drive shaft (2). The linkage meter counter (30) is connected to the sprocket through a chain to measure the distance traveled when the vehicle body (1) is moving. The discharge opening and closing assembly includes a discharge pull rod (14), a discharge handrail (15), a discharge connecting rod (13), and a door panel guide groove (10). The discharge door (12) is slidably disposed in the door panel guide groove (10). The bottom end of the discharge connecting rod (13) is hinged to the discharge door (12), and the upper end of the discharge connecting rod (13) is hinged to the discharge pull rod (14). The rear end of the discharge pull rod (14) is rotatably connected to the vehicle body (1), and the discharge pull rod (14) is fixedly connected to the discharge handrail (15) so that the discharge door (12) can be driven to slide in the door panel guide groove (10) through the discharge handrail (15) to realize the opening and closing of the discharge port (9). The limiting anti-turbulence linkage assembly includes a limiting swing rod (4), a limiting frame (5), a limiting connecting rod (6), a relay corner plate (7), a limiting linkage rod (8), and a limiting linkage ring (19). The limiting swing rod (4) is rotatably connected to the vehicle body (1) via a rotating shaft. The limiting swing rod (4) is hinged to the limiting frame (5). The limiting frame (5) is fixedly connected to the limiting connecting rod (6). The upper part of the relay corner plate (7) is rotatably connected to the vehicle body (1). The front and rear are respectively hinged to the limiting link (6) and the limiting linkage rod (8). The limiting linkage rod (8) is sleeved in the limiting linkage ring (19), and the limiting linkage ring (19) is fixedly connected to the discharge handrail (15) so that when the discharge handrail (15) moves, it drives the limiting swing rod (4) to drive the limiting frame (5) to swing relative to the ground to the limiting position or the reset position, thereby limiting and guiding the discharge position during the discharge process to suppress the turbulent flow and overflow of materials. The spring-back reset assembly includes a spring-back mounting plate (16), a reset mounting plate (17), and a reset spring (18). The spring-back mounting plate (16) is fixed to the vehicle body (1), the reset mounting plate (17) is fixed to the discharge handle (15), and the two ends of the reset spring (18) are connected to the reset mounting plate (17) and the spring-back mounting plate (16) respectively, so as to provide reset and spring-back force to the discharge opening and closing assembly and the limit anti-turbulence linkage assembly. The mixing and heating assembly includes a mixing chamber (25), a fixed cover (26), a flip cover (27), a stirring motor (31), a stirring shaft (32), a stirring baffle (36), and a hopper heating base plate (37). The fixed cover (26) is fixedly installed at the top opening of the mixing chamber (25), and the flip cover (27) is hinged to the fixed cover (26) to open and close the mixing chamber (25). The stirring motor (31) is fixedly installed on the fixed cover (26) and connected to the stirring shaft (32). The device is connected by a drive, and the stirring shaft (32) extends into the mixing chamber (25). The lower end of the stirring shaft (32) is provided with a stirring base (35) and a stirring baffle (36) to stir and mix the materials in the mixing chamber (25). The silo heating base plate (37) is located at the bottom of the mixing chamber (25). The device also includes a gas cylinder receiving chamber (21) for receiving the gas cylinder and setting the ignition nozzle of the gas cylinder at the corresponding position on the silo heating base plate (37) to heat the mixing chamber (25).

2. The road crack sealing device with distance measurement and anti-clogging material dispensing linkage as described in claim 1, characterized in that, The linkage meter counter (30) includes a meter counter bracket fixed to the vehicle body (1), an input shaft rotatably mounted on the meter counter bracket, and a driven sprocket set on the input shaft. A drive sprocket is fixedly set on the front drive shaft (2), and the drive sprocket and the driven sprocket are connected by chain drive. The linkage meter counter (30) also includes a counting mechanism coaxially connected to the input shaft. The counting mechanism is set inside the housing of the linkage meter counter (30) and performs cumulative counting as the input shaft rotates.

3. The road crack sealing device with distance measurement and anti-clogging material dispensing linkage as described in claim 1, characterized in that, The discharge door (12) is a vertical sliding door. The door panel guide groove (10) is vertically arranged on both sides of the discharge port (9). The discharge door (12) slides up and down in the door panel guide groove (10) to open or close the discharge port (9).

4. The road crack sealing device with distance measurement and anti-clogging material dispensing linkage as described in claim 1, characterized in that, The material guide trough (11) is provided below the discharge gate (12). The material guide trough (11) has an inverted triangular flow guiding structure, which is used to collect the material flowing out after the discharge gate (12) is opened and guide it to the predetermined grouting position.

5. A road surface crack sealing device with distance measurement and anti-clogging material dispensing linkage as described in claim 1, characterized in that, It also includes a power supply box (22), a speed controller (23), a battery (24), and a charging interface. The speed controller (23) and the battery (24) are both located inside the power supply box (22). The speed controller (23) has an output terminal for speed adjustment. The stirring motor (31) is electrically connected to the output terminal through a wiring harness. The positive and negative terminals of the battery (24) are electrically connected to the power input terminal of the speed controller (23) through wiring harnesses. The charging interface is fixedly installed on the outer wall of the power supply box (22) and electrically connected to the positive and negative terminals of the battery (24). The charging interface adopts the same type of charging socket as the two-wheeled electric vehicle so that an external charger can charge the battery (24).

6. A road surface crack sealing device with distance measurement and anti-clogging material dispensing linkage as described in claim 1, characterized in that, The mixing chamber (25) is provided with a fixed cover (26) at the top, and the flip cover (27) is hinged to the fixed cover (26); a flip cover connecting rod (28) is hinged on the flip cover (27), and a flip cover guide ring (29) is fixedly installed on the vehicle body (1). The flip cover connecting rod (28) passes through and is sleeved in the flip cover guide ring (29), so that during the opening and closing process of the flip cover (27) around its hinge, the flip cover connecting rod (28) is limited and guided by the flip cover guide ring (29) to constrain the opening and closing trajectory of the flip cover (27).

7. A road surface crack sealing device with distance measurement and anti-clogging material dispensing linkage as described in claim 2, characterized in that, A chain protection cover (34) is provided on the vehicle body (1), which covers the chain transmission area between the sprocket at the front drive shaft (2) and the linkage meter (30).

8. A road surface crack sealing device with distance measurement and anti-clogging material dispensing linkage as described in claim 1, characterized in that, A temperature sensor is installed in the mixing chamber (25), and a temperature controller and an alarm are installed on the vehicle body (1). The temperature sensor is electrically connected to the temperature controller. An electrically controlled shut-off valve is installed on the gas supply pipeline at the gas tank accommodating chamber (21). The electrically controlled shut-off valve is electrically connected to the temperature controller. The temperature controller is configured to drive the electrically controlled shut-off valve to shut off the gas supply when the temperature sensor detects that the temperature in the mixing chamber (25) has reached a preset upper limit threshold, and to drive the alarm to sound an alarm when the temperature exceeds a preset alarm threshold.

9. A road surface crack sealing device with distance measurement and anti-blocking material dispensing linkage as described in claim 1, characterized in that, The rear end of the vehicle body (1) is fixedly connected to a pushcart handle (20); a steering wheel (33) is provided at the bottom of the rear end of the vehicle body (1). The steering wheel (33) is rotatably connected to the vehicle body (1) through a steering shaft. The lower end of the steering shaft is connected to a steering bracket. The steering bracket is fixedly connected to the steering wheel (33), so that the steering wheel (33) can rotate relative to the vehicle body (1) around the steering shaft to achieve rear-end steering guidance of the vehicle body (1).

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