Asphalt spreading following trolley of paver

Abstract

A left side driving wheel assembly and a right side driving wheel assembly are arranged on the two sides of the front end of a trolley bottom plate respectively, and the two ends of a push rod assembly are connected with the left side driving wheel assembly and the right side driving wheel assembly respectively. The push rod assembly is used for connecting or disconnecting driving wheels of the left driving wheel assembly and the right driving wheel assembly with a front axle in a key mode, when the driving wheels are connected with the front axle in a key mode, the control assembly controls the driving wheel assemblies to enable the asphalt spreading trolley to move, and when the driving wheels are disconnected with the front axle, the asphalt spreading trolley is hung behind the paver. The driven wheel assembly comprises a left driven wheel assembly and a right driven wheel assembly, the left driven wheel assembly and the right driven wheel assembly are arranged on the two sides of the rear end of the trolley bottom plate respectively, the hopper assembly is installed on the trolley bottom plate, and the output end of the hopper assembly is connected with the spreading assembly; the spreading assembly is installed on the trolley bottom plate on the rear side of the driven wheel assembly and used for spreading asphalt left and right.

Description

TECHNICAL FIELD

[0001] The utility model belongs to road building machinery technical field, concretely relates to a paving machine follows asphalt spreading trolley. BACKGROUND

[0002] In the asphalt mixture paving operation, the road edge paving effect is often poor, because the asphalt mixture is generally spread from the middle of the asphalt paver to both sides, and the asphalt content in the paving edge of the asphalt mixture is low due to the segregation effect, the road edge paving effect is often poor, which affects the road paving effect and the service life of the road. At present, the commonly used spreading trolley is manually pushed or directly installed at the end of the paving machine and used as an auxiliary mechanism.

[0003] Therefore, a paving machine follows asphalt spreading trolley is developed to eliminate the paving defects of the road edge, liberate the manual labor and realize the integration of automatic and follow-up functions, which has a good market prospect. SUMMARY

[0004] The utility model discloses a paving machine follows asphalt spreading trolley to solve the prior art's problem.

[0005] In order to solve the technical problem, the technical scheme of the utility model is: a paving machine follows asphalt spreading trolley, including trolley bottom plate, drive wheel assembly, driven wheel assembly, hopper assembly, spreading assembly and control assembly, the drive wheel assembly includes left side drive wheel assembly, right side drive wheel assembly and push rod assembly, and the left side drive wheel assembly and the right side drive wheel assembly are arranged on both sides of the front end of the trolley bottom plate respectively, and the push rod assembly is connected with the left side drive wheel assembly and the right side drive wheel assembly at both ends respectively, the push rod assembly is used for connecting or disconnecting the drive wheels of the left side drive wheel assembly and the right side drive wheel assembly with the front side axle key, when the drive wheels are connected with the front side axle key, the control assembly moves the asphalt spreading trolley by controlling the drive wheel assembly, when the drive wheels are disconnected with the front side axle, the asphalt spreading trolley is hung behind the paving machine, the driven wheel assembly includes left side driven wheel assembly and right side driven wheel assembly, and the left side driven wheel assembly and the right side driven wheel assembly are arranged on both sides of the rear end of the trolley bottom plate respectively, the hopper assembly is installed on the trolley bottom plate, the hopper assembly output end is connected with the spreading assembly, and the spreading assembly is installed on the trolley bottom plate behind the driven wheel assembly and is used for spreading asphalt.

[0006] Preferably, the left and right drive wheel assemblies each comprise a drive motor, a pinion gear, a spur gear, a front axle, a front axle holder, a sensor and a drive wheel, the drive motor and the front axle holder are fixedly installed on the trolley bottom plate, the power output end of the drive motor is connected with the pinion gear, the pinion gear is engaged with the spur gear, the center key of the spur gear is connected with the front axle, one end of the front axle is rotatably installed on the front axle holder, the other end of the front axle is connected with the center key of the drive wheel, the sensor is arranged on the drive wheel, and the sensor is electrically connected with the control assembly.

[0007] Preferably, the front axle and the drive wheel are connected through a spline.

[0008] Preferably, the push rod assembly comprises a push rod motor, a push rod support, two push rods and two drive wheel displacement frames, the power output end of the push rod motor is connected with the push rod support, the two ends of the push rod support are respectively connected with the two push rods, the other ends of the two push rods are respectively connected with the two drive wheel displacement frames, the bottom sides of the two drive wheel displacement frames are respectively sleeved on the two front axles on the two sides of the drive wheel, the axial movement of the push rod driven by the push rod motor causes the drive wheel displacement frame to drive the drive wheel to be connected or disconnected with the front axle through the key, and the push rod motor is electrically connected with the control assembly.

[0009] Preferably, the drive wheel displacement frame comprises an upper connecting part and a lower connecting part, the upper side of the upper connecting part is connected with the push rod, the bottom of the upper connecting part is connected with the lower connecting part, and the lower connecting part has a U-shaped structure, and the two ends of the opening side of the U-shaped structure are respectively sleeved on the two front axles on the two sides of the drive wheel.

[0010] Preferably, the left and right driven wheel assemblies each comprise a rear axle, a rear axle holder, a driven wheel and a rear axle connecting frame, the rear axle holder is installed on the trolley bottom plate, one end of the rear axle is rotatably installed on the rear axle holder, the other end of the rear axle is connected with the center key of the driven wheel, and the two ends of the rear axle connecting frame are respectively connected with the rear axle holders of the left and right driven wheel assemblies.

[0011] Preferably, the hopper assembly comprises a hopper, a hopper upper cover, a hopper holder, a gear pump, a gear pump motor and an asphalt conveying pipe, the hopper holder is fixedly installed on the trolley bottom plate, the hopper is installed on the top of the hopper holder, the top of the hopper is provided with the hopper upper cover, the bottom of the hopper is connected with the gear pump through the asphalt conveying pipe, the gear pump is connected with the spreading assembly through the asphalt conveying pipe, the power output end of the gear pump motor is connected with the gear pump, and the gear pump motor is electrically connected with the control assembly.

[0012] Preferably, the scattering assembly comprises a lead screw motor, a shaft coupling, a lead screw, a lead screw nut, a spray pipe and a spray head, the lead screw is installed on the rear axle bracket through a connecting bracket, one end of the lead screw is connected to the power output end of the lead screw motor through the shaft coupling, the lead screw nut is threadedly connected to the lead screw, the bottom of the lead screw nut is provided with the spray pipe, the spray pipe is connected to the asphalt conveying pipe, and a plurality of spray heads are arranged on the spray pipe and face the ground.

[0013] Preferably, the vehicle shell is installed on the top of the trolley bottom plate.

[0014] Preferably, the front end of the vehicle shell is provided with a trailer hook for being connected to the paver.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] (1) The utility model discloses a paver following asphalt scattering trolley, and the asphalt scattering trolley works following the paver, and the spray head of the scattering assembly is used for uniformly spraying asphalt to the paving edge, thereby solving the problem of low asphalt content in the asphalt mixture of the paving edge and improving the paving effect of the road surface.

[0017] (2) The utility model discloses an asphalt scattering trolley, which is designed with two following driving modes, one of which is driven to run by relying on the driving motor of the trolley, and the other of which is connected to the paver by the trailer hook arranged at the front of the trolley, and the paver provides the front driving force for the trolley to ensure the cooperative work, and the utility model liberates manual work and realizes the integration of automatic and follow-up functions.

[0018] (3) The driving wheel assembly of the utility model is connected or disconnected with the front axle by the push rod assembly, when the driving wheel is connected with the front axle, the control assembly drives the asphalt scattering trolley to move by controlling the driving wheel assembly, and when the driving wheel is disconnected with the front axle, the asphalt scattering trolley is connected to the rear of the paver, thereby realizing the arbitrary switching of the two following driving modes.

[0019] (4) The scattering assembly of the utility model drives the lead screw nut to move by the lead screw motor, thereby driving the spray head to move left and right, so as to realize the uniform scattering of asphalt in a certain width working area. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the utility model discloses a paver following asphalt scattering trolley.

[0021] Figure 2 It is an internal structure schematic view of the utility model discloses a paver following asphalt scattering trolley.

[0022] Figure 3The utility model relates to a paving machine follows asphalt scattering trolley's front view structure schematic diagram.

[0023] Figure 4 The utility model relates to a paving machine follows asphalt scattering trolley's rear view structure schematic diagram.

[0024] Mark explanation:

[0025] 1, trolley bottom plate, 2, drive wheel assembly, 3, driven wheel assembly, 4, hopper assembly, 5, scattering assembly, 6, car shell, 7, trailer hook,

[0026] 2-1, left drive wheel assembly, 2-2, right drive wheel assembly, 2-3, push rod assembly, 2-4, drive motor, 2-5, pinion, 2-6, gear, 2-7, front axle, 2-8, front axle holder, 2-9, sensor, 2-10, drive wheel,

[0027] 2-3-1, push rod motor, 2-3-2, push rod support, 2-3-3, push rod, 2-3-4, drive wheel displacement frame,

[0028] 3-1, left driven wheel assembly, 3-2, right driven wheel assembly, 3-3, rear axle, 3-4, rear axle holder, 3-5, driven wheel, 3-6, rear axle connecting frame,

[0029] 4-1, hopper, 4-2, hopper upper cover, 4-3, hopper holder, 4-4, gear pump, 4-5, gear pump motor, 4-6, asphalt delivery pipe,

[0030] 5-1, lead screw motor, 5-2, shaft coupling, 5-3, lead screw, 5-4, lead screw nut, 5-5, spray pipe, 5-6, spray head. DETAILED DESCRIPTION

[0031] The utility model is described in detail below in connection with the drawings and specific embodiments, but the utility model is not only limited to these embodiments.The utility model covers any substitution, modification, equivalent method and scheme made on the essence and scope of the utility model.In order to make the public have the thorough understanding of the utility model, the specific details are explained in the following utility model embodiments, and the utility model can also be completely understood without the description of these details for the person skilled in the art.

[0032] Example 1

[0033] As Figures 1-3As shown, the utility model discloses a paving machine follows asphalt spreading trolley, including trolley bottom plate 1, drive wheel subassembly 2, driven wheel subassembly 3, hopper subassembly 4, spreading subassembly 5 and control assembly, drive wheel subassembly 2 includes left drive wheel subassembly 2-1, right drive wheel subassembly 2-2 and push rod subassembly 2-3, and left drive wheel subassembly 2-1 and right drive wheel subassembly 2-2 are arranged respectively in trolley bottom plate 1 front end both sides, and the both ends of push rod subassembly 2-3 are connected left drive wheel subassembly 2-1 and right drive wheel subassembly 2-2 respectively, and push rod subassembly 2-3 is used to drive wheel 2-10 of left drive wheel subassembly 2-1 and right drive wheel subassembly 2-2 with front side axle 2-7 key connection or disconnect, when drive wheel 2-10 with front side axle 2-7 key connection, control assembly makes asphalt spreading trolley move through control drive wheel subassembly 2, when drive wheel 2-10 with front side axle 2-7 disconnect, asphalt spreading trolley is hung in paving machine rear, follows paving machine and moves, driven wheel subassembly 3 includes left driven wheel subassembly 3-1 and right driven wheel subassembly 3-2, and left driven wheel subassembly 3-1 and right driven wheel subassembly 3-2 are arranged respectively in trolley bottom plate 1 rear end both sides, hopper subassembly 4 is installed on trolley bottom plate 1, and hopper subassembly 4 output end connects spreading subassembly 5, and spreading subassembly 5 is installed on trolley bottom plate 1 in driven wheel subassembly 3 rear side for spreading asphalt.

[0034] Embodiment 2

[0035] Preferably, as shown in Figure 2 、 3 The left drive wheel subassembly 2-1 and the right drive wheel subassembly 2-2 each include a drive motor 2-4, a pinion gear 2-5, a spur gear 2-6, a front axle 2-7, a front axle holder 2-8, a sensor 2-9, and a drive wheel 2-10. The drive motor 2-4 and the front axle holder 2-8 are fixedly installed on the trolley bottom plate 1. The power output end of the drive motor 2-4 is connected to the pinion gear 2-5. The pinion gear 2-5 is engaged with the spur gear 2-6. The spur gear 2-6 is centrally keyed to the front axle 2-7. One end of the front axle 2-7 is rotatably installed on the front axle holder 2-8. The other end of the front axle 2-7 is centrally keyed to the drive wheel 2-10. The sensor 2-9 is provided on the drive wheel 2-10 and is electrically connected to the control assembly.

[0036] The sensor 2-9 is a speed sensor.

[0037] Preferably, as shown in Figure 3 The front axle 2-7 and the drive wheel 2-10 are connected by a spline.

[0038] A sensor is provided on the front side of the trolley bottom plate 1. When the paving machine is started, the sensor captures the corresponding signal to control the drive motor to start.

[0039] Embodiment 3

[0040] Preferably, as shown in Figure 2 , 3 , the push rod assembly 2-3 includes a push rod motor 2-3-1, a push rod support 2-3-2, two push rods 2-3-3 and two drive wheel displacement frames 2-3-4, the power output end of the push rod motor 2-3-1 is connected to the push rod support 2-3-2, the two ends of the push rod support 2-3-2 are respectively connected to the two push rods 2-3-3, the other ends of the two push rods 2-3-3 are respectively connected to the two drive wheel displacement frames 2-3-4, the bottom sides of the two drive wheel displacement frames 2-3-4 are respectively sleeved on the front side axles 2-7 on the two sides of the drive wheels 2-10, the push rod motor 2-3-1 drives the axial movement of the push rods 2-3-3 to make the drive wheel displacement frames 2-3-4 drive the drive wheels 2-10 to be connected or disconnected with the front side axles 2-7, and the push rod motor 2-3-1 is electrically connected with the control assembly.

[0041] Preferably, as shown in Figure 2 , 3 , the drive wheel displacement frame 2-3-4 includes an upper connecting part and a lower connecting part, the upper side of the upper connecting part is connected to the push rod 2-3-3, the bottom of the upper connecting part is connected to the lower connecting part, and the lower connecting part has a U-shaped structure, and the two ends of the opening side of the U-shaped structure are respectively sleeved on the front side axles 2-7 on the two sides of the drive wheels 2-10.

[0042] Embodiment 4

[0043] Preferably, as shown in Figure 2 , the left driven wheel assembly 3-1 and the right driven wheel assembly 3-2 each include a rear axle 3-3, a rear axle holder 3-4, a driven wheel 3-5 and a rear axle connecting frame 3-6, the rear axle holder 3-4 is installed on the trolley bottom plate 1, one end of the rear axle 3-3 is rotatably installed on the rear axle holder 3-4, the other end of the rear axle 3-3 is connected to the center of the driven wheel 3-5 in a key connection manner, and the two ends of the rear axle connecting frame 3-6 are respectively connected to the rear axle holders 3-4 of the left driven wheel assembly 3-1 and the right driven wheel assembly 3-2.

[0044] The rear axle 3-3 is also provided with a sensor, and the sensor is electrically connected with the control assembly.

[0045] Embodiment 5

[0046] Preferably, as shown in Figure 2As shown, the hopper assembly 4 includes a hopper 4-1, a hopper upper cover 4-2, a hopper holder 4-3, a gear pump 4-4, a gear pump motor 4-5 and an asphalt conveying pipe 4-6, the hopper holder 4-3 is fixedly installed on the trolley base plate 1, the hopper 4-1 is installed on the top of the hopper holder 4-3, the top of the hopper 4-1 is provided with the hopper upper cover 4-2, the bottom of the hopper 4-1 is connected with the gear pump 4-4 through the asphalt conveying pipe 4-6, the gear pump 4-4 is connected with the spreading assembly 5 through the asphalt conveying pipe 4-6, the power output end of the gear pump motor 4-5 is connected with the gear pump 4-4, and the gear pump motor 4-5 is electrically connected with the control assembly.

[0047] The hopper 4-1 is conical, the bottom of the hopper 4-1 is supported by the hopper holder 4-3, and the middle part of the hopper 4-1 is supported by the vehicle shell 6.

[0048] The asphalt conveying pipe 4-6 is provided with an electromagnetic valve, and the electromagnetic valve is electrically connected with the control assembly.

[0049] Embodiment 6

[0050] Preferably, as shown in Figure 2 , 4 As shown, the spreading assembly 5 includes a lead screw motor 5-1, a shaft coupling 5-2, a lead screw 5-3, a lead screw nut 5-4, a spray pipe 5-5 and a spray head 5-6, the lead screw 5-3 is installed on the rear axle connecting frame 3-6 through a connecting frame, one end of the lead screw 5-3 is connected with the power output end of the lead screw motor 5-1 through the shaft coupling 5-2, the lead screw nut 5-4 is threadedly connected on the lead screw 5-3, the bottom of the lead screw nut 5-4 is provided with the spray pipe 5-5, the spray pipe 5-5 is connected with the asphalt conveying pipe 4-6, a plurality of spray heads 5-6 are arranged on the spray pipe 5-5, and the spray heads 5-6 are arranged on the spray pipe 5-5.

[0051] Preferably, as shown in Figure 1 Further comprising a vehicle shell 6, and the vehicle shell 6 is installed on the top of the trolley base plate 1.

[0052] Preferably, as shown in Figure 1 The front end of the vehicle shell 6 is provided with a trailer hook 7, and the trailer hook 7 is used for being hung with a paver.

[0053] The working principle of the utility model is as follows:

[0054] As shown in Figures 1-4The utility model discloses a paving machine follows pitch spreads dolly, including dolly bottom plate 1, drive wheel subassembly 2, driven wheel subassembly 3, hopper subassembly 4, spreads subassembly 5 and control assembly, push rod subassembly 2-3 two ends are connected left side drive wheel subassembly 2-1 and right side drive wheel subassembly 2-2 respectively, push rod subassembly 2-3 is used for the drive wheel 2-10 of left side drive wheel subassembly 2-1 and right side drive wheel subassembly 2-2 with the front axle 2-7 key connection or disconnect when drive wheel 2-10 with front axle 2-7 key connection, control assembly makes pitch spreads dolly move through control drive wheel subassembly 2, when drive wheel 2-10 with front axle 2-7 disconnect, pitch spreads dolly and hang in paving machine rear, follow paving machine moves, hopper subassembly 4 installs on dolly bottom plate 1, hopper subassembly 4 output end connects spreads subassembly 5, spreads subassembly 5 installs on dolly bottom plate 1 rear side of driven wheel subassembly 3 for spreading pitch, pitch spreads dolly and follow paving machine work, through the nozzle of spreads subassembly even pitch spraying to paving edge, solve the problem of low pitch content in the pitch mixture of paving edge, improve the road paving effect.

[0055] The utility model pitch spreads dolly design has two kinds of follow drive mode, one relies on the drive motor drive operation of dolly self, flexible independent, another help dolly front setting trailer hook, with paving machine closely linked, by paving machine provides the forward motion for it, guarantees the cooperation work.

[0056] The utility model's drive wheel subassembly through push rod subassembly the drive wheel of left side drive wheel subassembly and right side drive wheel subassembly with front axle key connection or disconnect, when drive wheel with front axle key connection, control assembly makes pitch spreads dolly move through control drive wheel subassembly, when drive wheel with front axle disconnect, pitch spreads dolly and hang in paving machine rear, realize the arbitrary switching of two kinds of follow drive mode.

[0057] The utility model's spreads subassembly through screw rod motor drive screw rod nut moves, to realize the even pitch spreading in certain width work area with the left and right movement of nozzle.

[0058] The following will be respectively to these two kinds of working state expansion introduction:

[0059] 1) motor drive, motor drive mode, is a kind of intelligent efficient automatic follow work mode, relies on the sensor (for sensing the position of paving machine) of dolly, control drive motor's start-stop operation, realize the cooperation linkage with pitch paving machine.In this system, drive wheel is connected with front axle through spline, and constructs the stable reliable power transmission path.

[0060] When the asphalt paver moves forward to carry out paving operation, the sensor of the trolley captures the corresponding signal, and the control driving motor starts. The power generated by the driving motor is transmitted to the front axle through the meshing of the pinion and the gear, and the front axle drives the driving wheel to rotate by means of the spline connection, and the trolley closely follows the paver body and moves synchronously.

[0061] Meanwhile, the speed sensor installed on the driving wheel of the trolley sends a signal when the driving wheel starts to rotate, and the control component receives the signal sent by the speed sensor, and triggers the gear pump motor to start. The asphalt stored in the hopper is conveyed to the spraying assembly along the asphalt conveying pipeline. The nozzle inside the spraying assembly adjusts the pose by the screw rod motor control to realize the spraying operation. When the screw rod motor rotates forward, the screw rod rotates forward synchronously, and the screw nut moves steadily to the right, and the asphalt is uniformly sprayed on the road surface in this process; on the contrary, when the screw rod motor reverses, the screw rod also reverses, and the screw nut moves to the left to meet the spraying demand of the road surface of different widths. The signal of the speed sensor controls the opening degree of the electromagnetic valve at the same time, so that the asphalt spraying flow can be automatically adapted at different speeds.

[0062] 2) Trailer hook connection

[0063] The trolley is connected with the paver through the trailer hook to obtain power, so as to realize the passive following operation mode, which breaks the dependence on the independent power supply of the driving motor and achieves the operation purpose by external traction.

[0064] In the initial stage of operation, the push rod motor starts to operate first, and drives the driving wheel displacement frame to execute the action. In this mechanical transmission process, the driving wheel displacement frame pushes the two driving wheels to the two sides, so that the driving wheels originally connected by the spline are smoothly separated from the front axle, and the driving wheels are connected with the axle by the bearing after being separated.

[0065] When the asphalt paver moves forward to work, the trailer hook transmits the traction force to the trolley, so that the trolley moves synchronously. At the same time, when the driving wheel starts to rotate, the speed sensor generates and transmits a signal. The control component receives the signal from the speed sensor and activates the gear pump motor. The asphalt stored in the hopper is conveyed to the spraying assembly through the asphalt conveying pipe and conveyed to the terminal end of the spraying pipe along the conveying pipeline, and the nozzle uniformly sprays the asphalt on the road surface. The signal of the speed sensor controls the opening degree of the electromagnetic valve at the same time, so that the asphalt spraying flow can be automatically adapted at different speeds.

[0066] The utility model discloses a paving machine follows asphalt spraying trolley, asphalt spraying trolley follows paving machine work, through the nozzle of spraying assembly even spraying asphalt to paving edge, solved the problem that asphalt content in the asphalt mixture of paving edge is low, improved the road paving effect.

[0067] The utility model asphalt scattering trolley design has two kinds of following drive mode, one is driven operation relying on the drive motor of trolley self -contained, flexible independent, another kind of trailer hook is set up with the help of trolley front, and is closely connected with paver, provides the forward motion for it by paver, guarantees the cooperation of work, the utility model liberates manual work, and realizes the integration of automatic, follow -up function.

[0068] The utility model discloses a drive wheel assembly is connected or disconnected with the front axle key to the drive wheel of left side drive wheel assembly and right side drive wheel assembly through push rod component, when the drive wheel is connected with the front axle key, control assembly moves asphalt scattering trolley through control drive wheel assembly, when the drive wheel is disconnected with the front axle, asphalt scattering trolley is hung in paver rear, realizes the arbitrary switching of two kinds of following drive mode.

[0069] The utility model discloses a drive screw nut moves through screw rod motor drive screw rod of scattering subassembly, to drive the left and right movement of the nozzle, to realize the even scattering of asphalt in certain width work area.

[0070] The above has made the detailed explanation to the preferred implementation of the utility model, but the utility model is not limited to the above -mentioned implementation, still can make various changes in the knowledge range of the ordinary skill of the people in the art without departing from the utility model's purpose, under the premise of not deviating from the utility model.

[0071] Many other changes and modifications can be made without departing from the spirit and scope of the utility model. It should be understood that the utility model is not limited to the specific embodiments, and the scope of the utility model is defined by the appended claims.

Claims

1. A paver follow behind asphalt distribution cart, characterized by: The invention discloses a trolley for asphalt paving, which comprises a trolley bottom plate (1), a driving wheel assembly (2), a driven wheel assembly (3), a hopper assembly (4), a spreading assembly (5) and a control assembly. The driving wheel assembly (2) comprises a left driving wheel assembly (2-1), a right driving wheel assembly (2-2) and a push rod assembly (2-3). The left driving wheel assembly (2-1) and the right driving wheel assembly (2-2) are arranged on the two sides of the front end of the trolley bottom plate (1) respectively. The two ends of the push rod assembly (2-3) are connected with the left driving wheel assembly (2-1) and the right driving wheel assembly (2-2) respectively. The push rod assembly (2-3) is used for connecting or disconnecting the driving wheel (2-10) of the left driving wheel assembly (2-1) and the right driving wheel assembly (2-2) with the front axle (2-7) by a key. When the driving wheel (2-10) is connected with the front axle (2-7), the control assembly controls the driving wheel assembly (2) to move the trolley. When the driving wheel (2-10) is disconnected with the front axle (2-7), the trolley is hung on the paver. The driven wheel assembly (3) comprises a left driven wheel assembly (3-1) and a right driven wheel assembly (3-2). The left driven wheel assembly (3-1) and the right driven wheel assembly (3-2) are arranged on the two sides of the rear end of the trolley bottom plate (1) respectively. The hopper assembly (4) is installed on the trolley bottom plate (1). The output end of the hopper assembly (4) is connected with the spreading assembly (5). The spreading assembly (5) is installed on the trolley bottom plate (1) behind the driven wheel assembly (3) and is used for spreading asphalt.

2. A paving screed following asphalt distribution cart according to claim 1, characterized in that: The left driving wheel assembly (2-1) and the right driving wheel assembly (2-2) each comprise a driving motor (2-4), a pinion (2-5), a gear wheel (2-6), a front axle (2-7), a front axle holder (2-8), a sensor (2-9) and a driving wheel (2-10). The driving motor (2-4) and the front axle holder (2-8) are fixedly installed on the trolley bottom plate (1) respectively. The power output end of the driving motor (2-4) is connected with the pinion (2-5). The pinion (2-5) is engaged with the gear wheel (2-6). The gear wheel (2-6) is connected with the front axle (2-7) by a key. One end of the front axle (2-7) is rotatably installed on the front axle holder (2-8). The other end of the front axle (2-7) is connected with the driving wheel (2-10) by a key. The sensor (2-9) is arranged on the driving wheel (2-10) and is electrically connected with the control assembly.

3. A paving screed following asphalt distribution cart according to claim 2, characterized in that: The front axle (2-7) and the driving wheel (2-10) are connected by a spline.

4. A paving screed following asphalt distribution cart according to claim 3, characterized in that: The push rod assembly (2-3) comprises a push rod motor (2-3-1), a push rod support (2-3-2), two push rods (2-3-3) and two drive wheel displacement frames (2-3-4), the power output end of the push rod motor (2-3-1) is connected with the push rod support (2-3-2), the two ends of the push rod support (2-3-2) are respectively connected with the two push rods (2-3-3), the other ends of the two push rods (2-3-3) are respectively connected with the two drive wheel displacement frames (2-3-4), the bottom sides of the two drive wheel displacement frames (2-3-4) are respectively sleeved on the front side axles (2-7) on the two sides of the drive wheels (2-10), the push rod motor (2-3-1) drives the push rods (2-3-3) to move axially so as to make the drive wheel displacement frames (2-3-4) drive the drive wheels (2-10) to be connected with or disconnected from the front side axles (2-7), and the push rod motor (2-3-1) is electrically connected with the control assembly.

5. A paving screed following asphalt distribution cart according to claim 4, characterized in that: The drive wheel displacement frame (2-3-4) comprises an upper connecting part and a lower connecting part, the upper side of the upper connecting part is connected with the push rod (2-3-3), the bottom of the upper connecting part is connected with the lower connecting part, and the lower connecting part has a U-shaped structure, and the two ends of the opening side of the U-shaped structure are respectively sleeved on the front side axles (2-7) on the two sides of the drive wheels (2-10).

6. The asphalt paving screed of claim 1, wherein: The left driven wheel assembly (3-1) and the right driven wheel assembly (3-2) each comprise a rear axle (3-3), a rear axle holder (3-4), a driven wheel (3-5) and a rear axle connecting frame (3-6), the rear axle holder (3-4) is installed on the trolley bottom plate (1), one end of the rear axle (3-3) is rotatably installed on the rear axle holder (3-4), the other end of the rear axle (3-3) is connected with the center of the driven wheel (3-5) in a key connection mode, and the two ends of the rear axle connecting frame (3-6) are respectively connected with the rear axle holders (3-4) of the left driven wheel assembly (3-1) and the right driven wheel assembly (3-2).

7. A paving screed follow behind asphalt distribution cart as claimed in claim 6, wherein: The hopper assembly (4) comprises a hopper (4-1), a hopper upper cover (4-2), a hopper holder (4-3), a gear pump (4-4), a gear pump motor (4-5) and an asphalt conveying pipe (4-6), the hopper holder (4-3) is fixedly installed on the trolley bottom plate (1), the hopper (4-1) is installed on the top of the hopper holder (4-3), the top of the hopper (4-1) is provided with the hopper upper cover (4-2), the bottom of the hopper (4-1) is connected with the gear pump (4-4) through the asphalt conveying pipe (4-6), the gear pump (4-4) is connected with the spreading assembly (5) through the asphalt conveying pipe (4-6), the power output end of the gear pump motor (4-5) is connected with the gear pump (4-4), and the gear pump motor (4-5) is electrically connected with the control assembly.

8. A paving screed follow behind asphalt distribution cart as claimed in claim 7, characterized in that: The scattering assembly (5) comprises a lead screw motor (5-1), a shaft coupling (5-2), a lead screw (5-3), a lead screw nut (5-4), a spray pipe (5-5) and a spray head (5-6), the lead screw (5-3) is installed on the rear axle connecting frame (3-6) through a connecting frame, one end of the lead screw (5-3) is connected to the power output end of the lead screw motor (5-1) through the shaft coupling (5-2), the lead screw nut (5-4) is threadedly connected to the lead screw (5-3), the bottom of the lead screw nut (5-4) is provided with the spray pipe (5-5), the spray pipe (5-5) is connected to the asphalt conveying pipe (4-6), a plurality of spray heads (5-6) are arranged on the spray pipe (5-5), and the spray nozzles of the spray heads (5-6) are directed towards the ground.

9. The asphalt paving screed of claim 1, wherein: Further comprising a vehicle shell (6) installed on the top of the trolley bottom plate (1).

10. A paving screed follow behind asphalt distribution cart as claimed in claim 9, wherein: The front end of the vehicle shell (6) is provided with a trailer hook (7) for being hung with a paver.

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