CN112172642A

CN112172642A - Self-discharging vehicle

Info

Publication number: CN112172642A
Application number: CN202011026790.2A
Authority: CN
Inventors: 冯广信; 冯立; 张江涛; 任廷志; 张连东
Original assignee: Hebei Tuoxi Machinery Technology Co ltd
Current assignee: Hebei Tuoxi Machinery Technology Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-01-05

Abstract

The invention provides a dump truck which comprises a carriage and a distributing roller, wherein the carriage can turn over between a lifting position and a leveling position, the bottom of the rear wall of the carriage is provided with a discharge opening, the distributing roller is rotatably arranged on the carriage and is close to the discharge opening, the distributing roller is used for distributing materials in the carriage on the ground, the highest point of the peripheral surface of the distributing roller is higher than the inner bottom surface of the carriage when the carriage is positioned at the leveling position, and h ═ is (omega x r x L)₁) and/V. The dumper provided by the embodiment of the invention can conveniently control the material distribution thickness through the material distribution roller, and has the advantages of high material distribution efficiency, low cost and good material distribution uniformity.

Description

Self-discharging vehicle

Technical Field

The invention relates to the technical field of transportation equipment, in particular to a dumper.

Background

The dump truck is a widely used transport vehicle, and the dump truck lifts a carriage, a rear breast board of the carriage is opened, the material carriage slides out to form a material pile, and in some application occasions, such as paving, the material pile is scattered by using equipment such as a hook machine, so that the material distribution is uneven, the material distribution thickness is difficult to control, the operation is complex, and the cost is high.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a dump truck, which can conveniently control the thickness of the cloth, and has the advantages of high cloth efficiency, low cost and good cloth uniformity.

According to an embodiment of the present invention, a dump truck includes: automobile body, wheel, carriage and cloth roller, the carriage is installed on the automobile body and can overturn lifting up the position and putting the level position between, the back wall bottom in carriage has the discharge opening, cloth roller rotationally installs just next-door neighbour on the carriage the discharge opening, cloth roller be used for with material distribution in the carriage is subaerial, the carriage is located when putting the level position the highest point of the outer peripheral face of cloth roller is higher than the interior bottom surface in carriage, wherein h ═ r (ω xrxl) x L₁) V, where h is the thickness of the cloth in millimeters, ω is the angular velocity of the cloth roller in radians per second, r is the radius of the cloth roller in millimeters, L₁The distance from the upper edge of the discharge opening to the horizontal plane where the highest point of the peripheral surface of the distributing roller is located is represented by millimeters, and V is the vehicle speed and is represented by meters per minute.

According to the dumper provided by the embodiment of the invention, the material distribution thickness can be conveniently controlled through the material distribution roller, and the dumper is high in material distribution efficiency, low in cost and good in material distribution uniformity.

In addition, the dump truck according to the invention also has the following additional technical features:

in some embodiments, wherein L₁Not less than 30 mm.

In some embodiments, V is 30-400 m/min, 0.5 rad/sec ω 6 rad/sec, 175 mm r 325 mm.

In some embodiments, an included angle between a connecting line of a point of intersection of the inner bottom surface of the carriage and the outer peripheral surface of the distributing roller and the circle center of the distributing roller and the vertical direction is more than or equal to 0 degree and less than or equal to 25 degrees.

In some embodiments of the present invention, the,

wherein L is₂The distance from the upper edge of the discharge opening to the inner bottom surface of the carriage is in millimeters, alpha is an included angle between a connecting line of an intersection point of the outer bottom surface of the carriage and the outer peripheral surface of the distributing roller and the circle center of the distributing roller and the vertical direction, lambda is a coefficient, s is the length of the discharge opening in the axial direction of the distributing roller, and is in millimeters, g is a gravity constant, and the unit is the square of meters per second.

In some embodiments, the dump truck further comprises: and a drive device for driving the distribution roller to rotate, wherein the drive device comprises: the driven chain wheel is arranged on the roll neck of the distributing roll; a clutch mounted on the wheel; the driving chain wheel is arranged on the clutch, and the clutch is used for transmitting the driving force of the wheel to the driving chain wheel or disconnecting the transmission of the driving force of the wheel to the driving chain wheel; a chain connected between the drive sprocket and the driven sprocket; a guide sprocket mounted on the vehicle body; the first end of the counterweight rod is provided with a counterweight, and the second end of the counterweight rod is provided with a tensioning chain wheel; the chain is arranged on the mounting frame of the distributing roller, and the chain sequentially bypasses the guide chain wheel, the driven chain wheel, the first direction changing chain wheel, the second direction changing chain wheel and the tensioning chain wheel from the driving chain wheel.

In some embodiments, the clutch comprises: a hollow transmission shaft; the transmission disc is arranged on the hollow transmission shaft and is connected with the wheels;

the ratchet wheel is rotatably arranged on the hollow transmission shaft, and the driving chain wheel is connected with the ratchet wheel so as to synchronously rotate with the ratchet wheel; the pawl component comprises a pawl seat and a pawl arranged on the pawl seat, and the pawl seat is arranged on the transmission disc and can pivot between an engagement position where the pawl is engaged with the ratchet wheel and a disengagement position where the pawl is disengaged from the ratchet wheel; the push rod is provided with a first end and a second end, and the first end of the push rod is abutted to the pawl seat; the adjusting shaft is rotatably matched in the hollow transmission shaft and is provided with a cam part, and a second end of the push rod is abutted against the cam part so that the cam part drives the push rod to push the pawl seat towards one of the engagement position and the disengagement position through rotation; and the first end of the resetting component is connected with the transmission disc, the second end of the resetting component is abutted against the pawl seat, and the resetting component is used for pushing the pawl seat towards one of the engaging position and the disengaging position.

In some embodiments, the pawl seat includes a first arm and a second arm, the first arm and the second arm are located on both sides of a pivot center of the pawl seat, a first end of the push rod abuts the first arm, a second end of the return member abuts the second arm, the push rod pushes the pawl seat to the disengaged position when the second end of the push rod abuts a farthest point from a center of the cam portion, and the return member pushes the pawl seat to the engaged position when the second end of the push rod abuts a closest point from the center of the cam portion.

In some embodiments, the cam portion is formed by removing a portion of the adjusting shaft along the circumferential direction of the adjusting shaft, and the cam portion forms a first step and a second step on two sides of the adjusting shaft in the circumferential direction, the adjusting shaft includes an adjusting portion extending from the inside of the hollow transmission shaft, the reset member includes a spring and a spring shaft, a first end of the spring is connected to the transmission disc, a second end of the spring abuts against the first end of the spring shaft, a second end of the spring shaft abuts against the pawl seat, a circumferential step is provided on the outer circumferential wall of the spring shaft, and a second end of the spring is sleeved on the spring shaft and abuts against the circumferential step.

In some embodiments, the outer circumferential surface of the transmission disc is provided with a blind hole and a through hole communicated with the inner cavity of the hollow transmission shaft, the push rod is movably fitted in the through hole, and the spring shaft are installed in the blind hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of a dump truck at a discharge port with a car in a raised state according to an embodiment of the present invention.

Fig. 2 is a schematic view of the dump truck according to the embodiment of the invention, in which the car is in a raised state.

Fig. 3 is a partially enlarged schematic view of the dump truck shown in fig. 1.

Fig. 4 is a partial schematic view of a dump truck according to an embodiment of the invention, with the car in a flat position.

Fig. 5 is an enlarged schematic view of a portion a in fig. 4.

Fig. 6 is an enlarged schematic view of a portion B in fig. 4.

Fig. 7 is another schematic view of a dump truck at a discharge port according to an embodiment of the invention.

Fig. 8 is a perspective view schematically showing a clutch of a driving apparatus of a dump truck according to an embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view of the clutch shown in FIG. 8.

Fig. 10 is a schematic front view of the clutch shown in fig. 8.

FIG. 11 is a cross-sectional schematic view of the clutch shown in FIG. 8 with the pawl engaged with the ratchet.

FIG. 12 is another cross-sectional schematic view of the clutch shown in FIG. 8 with the pawl disengaged from the ratchet.

FIG. 13 is a partial schematic view of the clutch shown in FIG. 8.

FIG. 14 is a schematic view of the clutch shown in FIG. 8 with the pawl engaged with the ratchet.

FIG. 15 is another schematic view of the clutch shown in FIG. 8, with the pawl disengaged from the ratchet.

Reference numerals:

a dump truck 100;

a vehicle body 1; a front wheel 11; a rear wheel 12; a compartment 2; a discharge opening 21; a hydraulic or pneumatic cylinder 22; a pivot 23; an inner bottom surface 24; a preflow port 25; an outer bottom surface 26; a distributing roller 3; a driven sprocket 41; the clutch 42; a hollow drive shaft 421; a drive plate 422; a mounting portion 4221; a blind hole 4222; a through hole 4223; a ratchet 423; a ratchet portion 4231; a mounting shaft portion 4232; a pawl member 424; a pawl seat 4241; a first arm 4242; a second arm 4243; a pawl 4244; a pivot 4245; a push rod 425; an adjustment shaft 426; a cam portion 4261; a first step 4262; a second step 4263; an adjustment portion 4264; a restoring member 427; a spring shaft 4271; a spring 4272; a bearing 428; a connecting sleeve 429; a reinforcement wing 4291; a connection flange 4210; a drive sprocket 43; a chain 44; a guide sprocket 45; a weight lever 46; a tension sprocket 47; a first direction changing sprocket 48; a second direction-changing sprocket 49; a dust cover 5; a dust cloth 6; a discharge opening adjusting device 7; a rotating shaft 71; an adjusting bolt 72; an adjustment lever 73.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A dump truck according to an embodiment of the invention is described below with reference to the drawings.

As shown in fig. 1 and 2, the dump truck 100 according to the embodiment of the invention includes a vehicle body 1, wheels, a car 2, and a distributing roller 3. The carriage 2 is reversible between a raised position and a flat position, and the bottom of the rear wall of the carriage 2 has a discharge opening 21. The flat position of the car 2 refers to a position state of the car 2 when the bottom wall of the car 2 is parallel to the ground, and the raised position of the car 2 refers to a position state of the car 2 when the front side of the car 2 is raised and the bottom wall of the car 2 forms a certain angle with the ground. For example, when the material in the carriage 2 needs to be distributed, the carriage 2 is lifted to the lifting position, and after the material distribution is finished, the carriage 2 is turned over from the lifting position to the leveling position. Of course, when loading the car 2, the car 2 is in a flat position.

As shown in fig. 2, the wheels include a front wheel 11 and a rear wheel 12 that are spaced apart in the front-rear direction of the vehicle body 1, the front wheel 11 may be two and opposed in the width direction of the vehicle body 1 (left-right direction in fig. 4), and the rear wheel 12 may be two and opposed in the width direction of the vehicle body 1.

In some embodiments, as shown in fig. 2, the vehicle body 1 is provided with a hydraulic cylinder or air cylinder 22, and the hydraulic cylinder or air cylinder 22 is used to raise the vehicle cabin 2 from the flat position to the raised position, and to retract the vehicle cabin 2 from the raised position to the flat position. As an example, the cylinder block of the hydraulic cylinder or air cylinder 22 is mounted on the head of the vehicle body 1, and the free end of the piston rod of the hydraulic cylinder or air cylinder 22 is connected to the front wall of the car 2. The car 2 is also connected to the vehicle body 1 via a pivot shaft 23, whereby the car 2 can be pivoted about the pivot shaft 23 relative to the vehicle body 1 under the action of a hydraulic or pneumatic cylinder 22 to be turned between a raised position and a flat position.

As shown in fig. 2, when the vehicle body 2 is in the flat position, the bottom wall of the vehicle body 2 is parallel to the ground. When the material in the carriage 2 needs to be distributed, the hydraulic cylinder or the air cylinder 22 acts, for example, the piston rod extends out, so as to lift the front end of the carriage 2 upwards, the carriage 2 rotates clockwise around the pivot 23, the bottom wall of the carriage 2 forms a certain included angle with the ground, and the carriage 2 is lifted from the flat position to the lifted position. When the distribution is over, the hydraulic or pneumatic cylinder 22 acts, for example, the piston rod retracts, to retract the front end of the carriage 2, i.e., the rear end of the carriage 2 rotates counterclockwise about the pivot 23, the bottom wall of the carriage 2 is finally parallel to the ground, and the carriage 2 returns from the raised position to the flat position.

The distribution roller 3 is rotatably mounted on the car 2 in the immediate vicinity of the discharge opening 21. The distributing roller 3 is used for distributing the material (such as lime or dry cement) in the carriage 2 on the ground, so as to form a material layer with a certain thickness on the ground. In other words, the distribution roller 3 carries out and distributes the material located near the discharge opening 21 by rotating.

When the carriage 2 is located the position of laying level, the highest point of the outer peripheral face of the distributing roller 3 is higher than the inner bottom face of the carriage 2, so that the distributing roller 3 can resist the material and prevent the material from flowing out of the discharge opening 21. When the carriage 2 is in the raised position and it is necessary to discharge and distribute the material in the carriage 2, the distributing roller 3 rotates to take the material in the carriage 2 out of the discharge opening 21. Meanwhile, the dumper moves forwards, so that the materials are uniformly distributed on the ground.

According to the dump truck provided by the embodiment of the invention, the relation is satisfied as follows: h ═ ω × r × L₁)/V。

Wherein h is the thickness of the cloth and the unit is millimeter; omega is the angular velocity of the distributing roller 3, and the unit is radian/second; r is the radius of the distributing roller 3 and the unit is millimeter; l is₁The distance from the upper edge of the discharge opening 21 to the horizontal plane where the highest point of the peripheral surface of the distributing roller 3 is located is represented by millimeter, the distance from the upper edge of the discharge opening 21 to the horizontal plane where the highest point of the peripheral surface of the distributing roller 3 is located is represented by L, namely the distance from the upper edge of the discharge opening 21 to the highest point of the peripheral surface of the distributing roller 3 in the vertical direction₁Indicated as the width of discharge opening 21; v is the vehicle speed in meters per minute.

For example, when the dump truck 100 according to the embodiment of the present invention is applied to a road paving project, the car 2 is brought to the raised position, and the dump truck 100 travels forward at the speed V, the distributing roller 3 rotates, and the material in the car 2 can be uniformly laid on the road surface. The cloth thickness h can be controlled by controlling omega, r and L₁And V for convenient control. Compared with the traditional dumper for unloading piled materials on the road surface and distributing the piled materials by using equipment such as a hook machine, the cloth uniformity is greatly improved, the cloth time is saved, additional equipment is not needed, and the cost is saved.

According to the dumper provided by the embodiment of the invention, the cloth thickness can be conveniently controlled, the cloth efficiency is high, the cost is low, and the cloth uniformity is good.

In some embodiments, L₁Not less than 30 mm. L is₁Can be determined according to the size of the particles of the materials in the carriage 2, and ensure that the materials can smoothly flow out from the discharge opening 21.

In some embodiments, V is 30-400 meters/minute. 0.5 radian/second ≦ ω ≦ 6 radian/second. R is more than or equal to 175 mm and less than or equal to 325 mm.

As shown in fig. 1, an angle between a line connecting an intersection point of the inner bottom surface 24 of the carriage 2 and the outer peripheral surface of the distributing roller 3 and the center of the distributing roller 3 and the vertical direction is θ. The inner bottom surface 24 of the car 2 is a surface of the car 3 which is in contact with the material. In some embodiments, 0 ≦ θ ≦ 25. The determination of theta needs to be considered to ensure that the material in the carriage 2 can be taken out by the distributing roller 3, that is, the friction force generated by the distributing roller 3 on the material can drive the material to flow out.

In some embodiments, as shown in fig. 1, an angle between a connecting line of a center of the distribution roller 3 and a vertical direction of an intersection point of the outer bottom surface 26 of the car 2 and the outer peripheral surface of the distribution roller 3 is α, and α is a motion repose angle of the material, and optionally, 30 ° < α <35 °.

In some embodiments, as shown in fig. 1, the car 2 further has a preflow 25, the preflow 25 having a width L₂In millimeters. The width of the preflow port 25 is the distance from the upper edge of the discharge port 21 to the inner bottom surface 24 of the vehicle compartment 2.

In some embodiments, L₁And L₂Satisfies the following relationship:

wherein, the lambda is a coefficient, and the lambda is more than or equal to 0.6 and less than or equal to 1.2. For example, when limestone is distributed, 0.6 ≦ λ ≦ 0.8. As shown in fig. 4, s is the length of the discharge opening 21 in the left-right direction, and is in millimeters. The length of the preflow port 25 in the left-right direction is equal to the length of the discharge port 21 in the left-right direction, both s. The left and right direction is the axial direction of the distributing roller 3. g is the gravitational constant in meters per second squared.

In some embodiments, discharge opening 21 has a width L₁Is adjustable.

In some embodiments, the dump truck 100 includes a discharge port adjustment device 7. As shown in fig. 1, a discharge port adjusting device 7 is installed on the rear wall of the car body 2 for adjusting the width L of the discharge port 21₁Size.

As an example, as shown in fig. 7, the discharge opening adjusting device 7 includes a rotating shaft 71, an adjusting bolt 72, and an adjusting lever 73, a first end of the adjusting lever 73 being connected to the rotating shaft 71 so that the adjusting lever 73 can rotate about the rotating shaft 71, and a second end of the adjusting lever 73 being located at the discharge opening 21. The lower end of the second end of the adjustment lever 73 is the upper edge of the discharge opening 21, and the position of the lower end of the second end of the adjustment lever 73 determines L₁The size of (2). The adjustment lever 73 can change the position of the lower end of the second end by rotating about the rotation shaft 71. The adjustment bolt 72 is coupled to the adjustment lever 73 so as to adjust the rotation angle of the adjustment lever 73. For example, as shown in FIG. 6, when L is needed₁And the adjusting bolt 72 is adjusted to be enlarged, so that the adjusting lever 73 is rotated clockwise about the rotating shaft 71, and the lower end of the second end of the adjusting lever 73 is moved upward, thus L₁Can be enlarged. Conversely, when it is desired to convert L₁Turned down, the adjusting bolt 72 is adjusted such that the adjusting lever 73 is rotated counterclockwise about the rotating shaft 71 and the lower end of the adjusting lever 73 is moved downward, thus L₁Can be turned down.

In some embodiments, the dump truck 100 drives a device, as shown in fig. 2. The driving device is connected with the distributing roller 3 to drive the distributing roller 3 to rotate for distributing.

In some embodiments, the ratio of the rotational speed of the drive means to the rotational speed of the distribution roller 3 (i.e. the transmission ratio) is i, the thickness of the cloth h and the ratio of the rotational speeds i to L₁Satisfies the following relationship:

thus L can be obtained from the thicknesses h and i of the cloth₁Thereby obtaining L from the relation (1)₂. In some embodiments, as shown in fig. 2-6, the drive device includes a driven sprocket 41, a clutch 42, a drive sprocket 43, and a chain 44. The chain 44 is connected between the driving sprocket 43 and the driven sprocket 41. The driving means is connected to an external power source to drive the driving sprocket 43 to rotate. The chain 44 transmits the power of the driving sprocket 43 to the driven sprocket 41, thereby driving the rotation of the driven sprocket 41. i is the ratio of the rotational speed of the drive sprocket 43 to the distribution roller 3.

In some embodiments, the driven sprocket 41 is mounted on the neck of the distribution roller 3, the driven sprocket 41 being able to rotate synchronously with the distribution roller 3. As shown in fig. 4, the axial direction of the distributing roller 3 extends in the left-right direction, a driven sprocket 41 is mounted on the roller neck of the distributing roller 3, the driven sprocket 41 is coaxial with the distributing roller 3, and the rotation of the driven sprocket 41 can drive the rotation of the distributing roller 3.

In some embodiments, the clutch 42 is mounted on a wheel. At this time, the wheels are used as an external power source, and i is the rotation speed ratio of the wheels to the distributing roller 3. Alternatively, as shown in fig. 2 and 6, the clutch 42 is mounted on the rear wheel 12, and rotation of the rear wheel 12 drives the clutch 42 to rotate synchronously. Preferably, the clutch 42 is coaxial with the rear wheel 12. The drive sprocket 43 is mounted on the clutch 42. The clutch 42 is used to transmit the driving force of the on wheel to the driving sprocket 43 or to transmit the driving force of the off wheel to the driving sprocket 43. By providing the clutch 42 in a different state, the driving force of the wheels can be turned on or off and transmitted to the driving sprocket 43. For example, the driving force of the wheels can be transmitted to the driving sprocket 43 through the clutch 42, the driving sprocket 43 transmits the driving force to the driven sprocket 41 through the chain 44, and the driven sprocket 41 finally drives the distributing roller 3 to rotate to realize distributing. When the clutch 42 disconnects the driving force of the wheels from being transmitted to the driving sprocket 43, the rotation of the wheels does not drive the rotation of the driving sprocket 43, so that the rotation of the distributing roller 3 is not caused, and the dump truck 100 does not distribute the material.

In some embodiments, as shown in fig. 2, the drive device further includes a guide sprocket 45, a counterweight rod 46, a first direction changing sprocket 48, and a second direction changing sprocket 49.

In some embodiments, as shown in fig. 2-6, a guide sprocket 45 is mounted on the journal of the pivot 23. The guide sprocket 45 is located between the drive sprocket 43 and the driven sprocket 41. The guide sprocket 45 performs a guiding function.

In some embodiments, as shown in fig. 2-6, a first end of the weight bar 46 is provided with a weight and a second end of the weight bar 46 is provided with a tensioning sprocket 47. As an example, the weight lever 46 is mounted on the roll neck of the distribution roll 3, and the tension sprocket 47 is located between the drive sprocket 43 and the driven sprocket 41. The tensioning sprocket 47 abuts against the outside of the chain 44 so that the tensioning force of the chain 44 can be adjusted. The position of the tension sprocket 47 can be adjusted by adjusting the installation angle of the weight lever 46 so as to adjust the tension of the chain 44. As shown in fig. 2, the position of the tension sprocket 47 is adjusted by adjusting the angle of the weight lever 46, and the tension of the chain 44 can be achieved because the tension sprocket 47 abuts against the outside of the chain 44. It will be appreciated that in other embodiments, the tensioning sprocket 47 may also abut the inside of the chain 44 to provide tension to the chain 44.

In some embodiments, as shown in fig. 2 to 6, the first direction-changing sprocket 48 and the second direction-changing sprocket 49 are mounted on a mounting frame of the distribution roller 3. Wherein the chain 44 passes from the driving sprocket 43 sequentially around the guide sprocket 45, the driven sprocket 41, the first direction changing sprocket 48, the second direction changing sprocket 49 and the tension sprocket 47. The first direction changing sprocket 48 and the second direction changing sprocket 49 are used to change the orientation of the chain 44 so that the direction of rotation of the distribution roller 3 is opposite to the direction of rotation of the rear wheel 12. This is because the rear wheel 12 rotates counterclockwise when the dump truck 100 travels forward, the counterclockwise rotation of the rear wheel 12 can drive the driving sprocket 43 to rotate counterclockwise, and the distributing roller 3 needs to rotate clockwise if the distributing roller 3 is to discharge the material. That is, the counterclockwise rotation of the driving sprocket 43 is required to drive the driven sprocket 41 to rotate clockwise. The first direction-changing chain wheel 48 and the second direction-changing chain wheel 49 are arranged, so that the driven chain wheel 41 can be driven to rotate clockwise by the anticlockwise rotation of the driving chain wheel 43, and the cloth discharging is realized.

As shown in fig. 2, after the chain 44 passes around the guide sprocket 45 from the driving sprocket 43, it passes under the driven sprocket 41, i.e., the driven sprocket 41 abuts against the outer side of the chain 44. Subsequently, the chain 44 passes around the first and second direction-changing

sprockets

48, 49 and the tension sprocket 47. Therefore, as shown in fig. 2, when the dump truck 100 travels forward, the rear wheel 12 rotates counterclockwise, and at this time, if the clutch 42 is in a transmission state (the pawl 4244 is in an engagement state with the ratchet wheel 423), the clutch 42 transmits the driving force of the rear wheel 12 to the driving sprocket 43, the driving sprocket 43 rotates counterclockwise with the rear wheel 12, since the chain 44 passes under the driven sprocket 41, the driven sprocket 41 abuts against the outer side of the chain 44, the driven sprocket 41 rotates clockwise under the driving of the chain 44, and the clockwise rotation of the driven sprocket 41 drives the clockwise rotation of the distributing roller 3. The clockwise rotation of the distributing roller 3 can discharge the materials in the carriage 2 from the discharge opening 23, and the materials carried out by the distributing roller 3 from the discharge opening 23 simultaneously realize the distribution on the traveling route of the dump truck 100 because the dump truck 100 travels forward. That is, the material distribution position is on the travel route of the dump truck 100. When the dump truck 100 stops running forwards, the rear wheels 12 stop rotating, at this time, the driving device does not drive the distributing roller 3 to rotate any more, the distributing action stops, and the materials in the carriage 2 cannot be discharged out by self due to the blocking of the distributing roller 3.

As an example, as shown in fig. 4, when the car 2 is in the flat state, the first redirecting sprocket 48 is located above the second redirecting sprocket 49, and both the first redirecting sprocket 48 and the second redirecting sprocket 49 are located behind the driven sprocket 41. In the up-down direction, the axis of the first redirecting sprocket 48 is located above the axis of the driven sprocket 41, and the axis of the second redirecting sprocket 49 is located below the axis of the driven sprocket 41.

The drive device of the dump truck 100 shown in fig. 2 to 6 is located on the right side of the vehicle body 1, and the clutch 42 is attached to the rear wheel 12 on the right side. Alternatively, the drive device of the dump truck 100 may be mounted on the rear wheel 12 on the left side. Further alternatively, the drive device of the dump truck 100 may be mounted on both of the rear wheels 12. Alternatively, the drive device of the dump truck 100 may be mounted on the front wheel 11.

The clutch 42 of the drive device of the dump truck according to the embodiment of the invention is described below with reference to fig. 8 to 15.

As shown in fig. 8-15, the clutch 42 includes a hollow drive shaft 421, a drive plate 422, a ratchet wheel 423, a pawl member 424, a push rod 425, an adjustment shaft 426, and a reset member 427.

For convenience, in the following description, the driving plate 422 serves as a driving member, the wheel is connected to the driving plate 422 to drive the driving plate 422 to rotate, the ratchet 423 serves as a driven member, and the driving force of the driving plate 422 can be selectively transmitted to the ratchet 423.

As shown in fig. 9, a driving plate 422 is mounted on the hollow driving shaft 421 to be connected to the wheels, and the driving plate 422 can rotate synchronously with the hollow driving shaft 421. The ratchet 423 is rotatably mounted on the hollow drive shaft 421, i.e. the ratchet 423 is rotatable relative to the hollow drive shaft 421, e.g. the ratchet 423 is bearing mounted on the hollow drive shaft 421. The driving sprocket 43 is connected to the ratchet gear 423 to rotate in synchronization with the ratchet gear 423. That is, the rotation of the wheels can drive the hollow transmission shaft 421 and the transmission disc 422 to rotate, and the rotation of the transmission disc 422 can drive the drive sprocket 43 to rotate by driving the ratchet 423.

As shown in fig. 8 and 10-15, the pawl member 424 includes a pawl seat 4241 and a pawl 4244 mounted on the pawl seat 4241. The pawl seat 4241 is mounted on the drive plate 422 and is pivotable between an engaged position in which the pawl 4244 is engaged with the ratchet gear 423 and a disengaged position in which the pawl 4244 is disengaged from the ratchet gear 423. In other words, the pawl seat 4241 is pivotally mounted on the drive plate 422 between the engaged and disengaged positions. It is understood that the engaged position may also be referred to as the engaged position of the pawl 4244 and the disengaged position may also be referred to as the disengaged position of the pawl 4244.

Since the pawl seat 4241 is mounted on the transmission disc 422 and can rotate synchronously with the transmission disc 422 and the hollow transmission shaft 421, when the pawl seat 4241 is in the engaged position, as shown in fig. 11 and 14, the pawl 4244 is engaged with the ratchet gear 423. Since the pawls 4244 are mounted on the pawl seat 4241 and the pawl seat 4241 is mounted on the transmission disc 422, in this case, the wheel drives the transmission disc 422 and thus drives the pawl seat 4241 and the pawls 4244. If the driving disk 422 and the pawl seat 4241 and the pawl 4244 rotate clockwise in fig. 14, the pawl 4244 drives the ratchet gear 423 to rotate synchronously with the driving disk 422 and the hollow driving shaft 421, and the ratchet gear 423 is in a driving state (also referred to as the clutch 42 is in a driving state). If the driving plate 422 and the pawl seat 4241 and the pawl 4244 rotate counterclockwise in fig. 14, the pawl 4244 cannot drive the ratchet 423 to rotate synchronously with the driving plate 422 and the hollow driving shaft 421, and the ratchet 423 is in a non-driving state (also called the clutch 42 is in a non-driving state)

When the pawl seat 4241 is in the disengaged position, as shown in fig. 12 and 15, the pawl 4244 is disengaged from the ratchet gear 423, and no matter the wheel drives the transmission disc 422 and the pawl seat 4241 and the pawl 4244 rotate in the counterclockwise direction or the clockwise direction in fig. 15, the pawl 4244 cannot drive the ratchet gear 42, that is, the rotation of the transmission disc 422 and the hollow transmission shaft 421 cannot be transmitted to the ratchet gear 423, and the ratchet gear 423 is in a free state (also referred to as the clutch 42 is in a free state).

As described above, the transmission state means that the ratchet 423 can be synchronously rotated by the pawl 4244 when the transmission disc 422 and the hollow transmission shaft 421 rotate in a first direction (for example, clockwise rotation in fig. 14), and thus the power of the transmission disc 422 is transmitted to the ratchet 423, and the transmission state means that the pawl 4244 is engaged with the ratchet 423 but cannot rotate relative to the ratchet 423 to drive the ratchet 423 to rotate when the transmission disc 422 and the hollow transmission shaft 421 rotate in a second direction (for example, counterclockwise rotation in fig. 14), which is opposite to the first direction, and thus the power of the transmission disc 422 cannot be transmitted to the ratchet 423. The free state means that the pawl 2 is not able to drive the ratchet wheel 423 to rotate synchronously with the transmission disc 422 and the hollow transmission shaft 421 because the pawl 2 is disengaged from the ratchet wheel 423 regardless of whether the transmission disc 422 rotates clockwise or counterclockwise.

Thus, the clutch 42 has three states, i.e., a transmission state in which power can be transmitted between the transmission disc 422 and the ratchet gear 423 when the transmission disc 422 rotates in the first direction, a non-transmission state in which power cannot be transmitted between the transmission disc 2 and the ratchet gear 423 when the transmission disc 422 rotates in the second direction, and a free state in which power cannot be transmitted between the transmission disc 2 and the ratchet gear 423 when the transmission disc 422 rotates in both the first direction and the second direction. When the clutch 42 is in the transmission state, the driving force of the conducting wheel is transmitted to the driving sprocket 43, i.e. the rotation of the wheel can drive the driving sprocket 43 to rotate. When the clutch 42 is in the non-transmission state or the free state, it disconnects the transmission of the driving force of the wheels to the driving sprocket 43, i.e. the rotation of the wheels cannot drive the driving sprocket 43 to rotate.

As shown in fig. 11-15, the pushrod 425 has a first end and a second end, and the first end of the pushrod 425 abuts the pawl seat 4241.

As shown in fig. 8 to 15, the adjustment shaft 426 is rotatably fitted in the hollow transmission shaft 421, the adjustment shaft 426 has a cam portion 4261, the second end of the push rod 425 abuts against the cam portion 4261, and the cam portion 4261 urges the pawl seat 4241 toward one of the engaged position and the disengaged position by rotating the drive rod 425. That is, by rotating the adjustment shaft 426, the cam portion 4261 of the adjustment shaft 426 is simultaneously rotated, and the cam portion 4261 drives the push rod 425 to push the first end of the push rod 425 against the pawl seat 4241, thereby pushing the pawl seat 4241 to one of the engaged position and the disengaged position.

As shown in fig. 11-15, a first end of the reset member 427 is connected to the transmission disc 422 and a second end of the reset member 427 abuts the pawl seat 4241. The return member 427 serves to urge the pawl seat 4241 toward the other of the engaged position and the disengaged position. For example, when the cam portion 4261 rotates to drive the push rod 425 to push the pawl seat 4241 toward the engaged position, the return member 427 serves to push the pawl seat 4241 toward the disengaged position. When the cam portion 4261 rotates to drive the push rod 425 to push the pawl seat 4241 toward the disengaged position, the return member 427 serves to push the pawl seat 4241 toward the engaged position.

In some embodiments, as shown in fig. 9, a driving plate 422 is mounted at the rear end of the hollow driving shaft 421 in the front-rear direction, for example, may be mounted at the rear end of the hollow driving shaft 421 by bolts or welding. Preferably, the drive disc 422 is coaxial with the hollow drive shaft 421. Alternatively, the driving plate 422 and the hollow driving shaft 421 may be integrally formed.

As an example, as shown in fig. 9, the driving disk 422 has a mounting portion 4221 located at an outer peripheral edge in the radial direction, and the pawl seat 4241 may be mounted on the mounting portion 4221. The mounting portion 4221 is provided with a mounting hole axially therethrough, and the pivot shaft 4245 passes through the pawl seat 4241 and the mounting hole to mount the pawl seat 4241 on the transmission disc 422. The pawl seat 4241 is able to pivot about a pivot axis 4245.

As shown in fig. 10-15, in some embodiments the pawl seat 4241 includes a first arm 4242 and a second arm 4243. The first and

second arms

4242, 4243 are located on opposite sides of the center of pivot of the pawl seat 4241. As mentioned above, the center of pivot of the pawl seat 4241 is the center of the pivot axis 4245 and the first and

second arms

4242 and 4243 are located on opposite sides of the pivot axis 4245. The first and

second arms

4242 and 4243 are located outside the outer circumferential surface of the transmission disc 422 in the radial direction of the transmission disc 422.

Illustratively, the ratchet gear 423 is located on a front side of the drive plate 422, as shown in fig. 8 and 9. The pawl seat 4241 is installed on the transmission disc 422, the pawl 4244 is connected with the pawl seat 4241 so as to be synchronous with the pawl seat 4241, and the pawl 4244 is positioned at the front side of the pawl seat 4241. The pawl 4244 is engageable and disengageable with the ratchet gear 423.

As shown in fig. 10-15, a first end of the push rod 425 (the radially outer end of the hollow drive shaft 421 in fig. 11) abuts the first arm 4242, and a second end of the restoring member 427 (the radially outer end of the hollow drive shaft 421 in fig. 11) abuts the second arm 4243. When the cam portion 4261 is rotated in the clockwise direction from the position shown in fig. 11 to the position shown in fig. 12, the cam portion 4261 drives the push rod 425 to move radially outward, the pawl seat 4241 pivots about the pivot shaft 4245 by being urged by the push rod 425, and the first arm 4242 swings in the radial direction of the hollow transmission shaft 421 toward a direction away from the central axis of the hollow transmission shaft 421. Meanwhile, the second arm 4243 swings in the radial direction of the hollow transmission shaft 421 toward a direction close to the central axis of the hollow transmission shaft 421. Since the second arm 4243 abuts the second end of the restoring member 427, the second arm 4243 pushes the restoring member 427. As an example, at this time the pawl seat 4241 pivots toward the disengaged position, i.e., the push rod 425 pushes the pawl seat 4241 toward the disengaged position. In the disengaged position, the pawl 2 is disengaged from the ratchet gear 423, so that no driving force is transmitted to the ratchet gear 423 regardless of whether the driving plate 422 rotates counterclockwise or clockwise. It will be understood, of course, that if the pawl seat 4241 is now pivoted toward the engaged position, that is, the push rod 425 is pushing the pawl seat 4241 toward the engaged position.

When the cam portion 4261 is rotated in the needle-reversing direction from the position shown in fig. 12 to the position shown in fig. 11, the cam portion 4261 allows the push rod 425 to move radially inward, the pawl seat 4241 pivots about the pivot shaft 4245 by the urging of the return member 427, and the second arm 4243 swings radially of the hollow transmission shaft 421 in a direction away from the central axis of the hollow transmission shaft 421. Meanwhile, the first arm 4242 swings in the radial direction of the hollow transmission shaft 421 toward a direction close to the central axis of the hollow transmission shaft 421. At this time, the pawl seat 4241 pivots toward the engaged position where the pawl 2 is engaged with the ratchet gear 423 so that the driving force can be transmitted to the ratchet gear 423 when the rotating disc 2 rotates in the clockwise direction in fig. 11, and the driving force cannot be transmitted to the ratchet gear 423 when the rotating disc 2 rotates in the counterclockwise direction in fig. 11, that is, the reset member 427 urges the pawl seat 4241 toward the engaged position.

As shown in fig. 10-15, in some embodiments, the cam portions 4261 are formed by removing a portion of the adjustment shaft 426 in a circumferential direction of the adjustment shaft 426, and the cam portions 4261 form a first step 4262 and a second step 4263 on both sides of the adjustment shaft 426 in the circumferential direction, respectively. The first step 4262 and the second step 4263 play a limiting role, and the relationship between the rotation angle of the cam portion 4261 and the translation distance of the push rod 425 can be adjusted by adjusting the distance between the first step 4262 and the second step 4263 in the circumferential direction. The second end of the push rod 425 may be always in relatively slidable contact with the outer peripheral surface of the cam portion 4261.

The cam portion 4261 has a farthest point a farthest from the center of the cam portion 4261 (an intersection of the first step 4262 and the outer peripheral surface of the cam portion 4261) and a closest point b closest to the center of the cam portion 4261 (an intersection of the second step 4263 and the outer peripheral surface of the cam portion 4261).

When the second end of the plunger 425 abuts the farthest point a of the cam portion 4261, the plunger 425 can be stopped by the first step 4262. When the second end of the plunger 425 abuts on the closest point b of the cam portion 4261, the plunger 425 can be stopped by the second step 4263. When the second end of the push rod 425 slides along the circumferential surface of the cam portion 4261 from the closest point b to the closest point b, the push rod 425 pushes the pawl seat 4241 toward one of the engaged position and the disengaged position. That is, when the second end of the push rod 425 abuts on the farthest point a of the cam portion 4261, the pawl seat 4241 is located at one of the engaged position and the disengaged position; when the second end of the push rod 425 abuts on the closest point b of the cam portion 4261, the pawl seat 4241 is located at the other of the engaged position and the disengaged position.

In some embodiments, as shown in fig. 12, when the second end of the pushrod 425 abuts the distal-most point a, the pushrod 425 pushes the pawl seat 4241 to the disengaged position and the pawl 2 disengages from the ratchet 423. As shown in fig. 11, when the second end of the push rod 425 abuts on the closest point b, the return member 427 pushes the pawl seat 4241 to the engagement position, and the pawl 2 engages with the ratchet 423. Namely, when the second end of the push rod 425 abuts against the farthest point a, the pawl seat 4241 is located at the disengaging position; when the second end of the push rod 425 abuts at the closest point b, the pawl seat 4241 is located at the engaged position.

In the above embodiments, as shown in fig. 10-15, the pawl 4244 is located on the same side of the pivot 4245 as the first arm 4242, and the pawl 4244 is located on opposite sides of the pivot 4245 as the second arm 4243.

In the above embodiment, as shown in fig. 10 to 15, when the second end of the push rod 425 moves from the closest point b to the farthest point a and finally comes into contact with the farthest point a, the first end of the push rod 425 pushes the first arm 4242 in a direction away from the central axis of the hollow transmission shaft 421. Since the pawl 4244 is located on the same side of the pivot center of the pawl seat 4241 as the first arm 4242, the pawl 4244 is driven away from the central axis of the hollow transmission shaft 421 by the pawl seat 4241, so that the pawl 4244 is disengaged from the ratchet gear 423, the ratchet gear 423 is not driven by the pawl 4244, and the ratchet gear 423 is in a free state.

When the second end of the plunger 425 moves from the distal-most point a to the proximal-most point b and finally abuts the proximal-most point b, the second end of the restoring member 427 pushes the second arm 4243 in a direction away from the central axis of the hollow drive shaft 421. Since the pawl 4244 and the second arm 4243 are located on opposite sides of the pivot center of the pawl seat 4241, the pawl 4244 will swing in a direction approaching the central axis of the hollow transmission shaft 421, so that the pawl 4244 engages with the ratchet gear 423, and the ratchet gear 423 can be driven to rotate by the pawl 4244. As described above and shown in fig. 14, when the pawl 4244 rotates clockwise, the ratchet 423 is driven to rotate, the ratchet 423 is in a transmission state, when the pawl 4244 rotates counterclockwise, the ratchet 423 cannot be driven to rotate, and the ratchet 423 is in a non-transmission state.

In other embodiments, the return member 427 may alternatively urge the pawl seat 4241 to the disengaged position when the second end of the pushrod 425 abuts the distal-most point a and the pawl seat 4241 to the engaged position when the second end of the pushrod 425 abuts the proximal-most point b. That is, when the second end of the push rod 425 abuts the farthest point a, the pawl seat 4241 is located at the engaged position; when the second end of the push rod 425 abuts the closest point b, the pawl seat 4241 is located at the disengaged position.

In some embodiments, as shown in FIG. 8, to facilitate rotation of the adjustment shaft 426, the adjustment shaft 426 further includes an adjustment portion 4264 extending from within the hollow drive shaft 421. Further, the adjusting portion 4264 has a cross-section of a regular hexagon, so that the adjusting portion 4264 can be conveniently rotated using an adjusting tool such as a wrench.

As shown in fig. 11-15, the return member 427 includes a spring 4272 and a spring spindle 4271, a first end of the spring 4272 is connected to the drive plate 422, a second end of the spring 4272 abuts a first end of the spring spindle 4271, and a second end of the spring spindle 4271 abuts the pawl seat 4241.

In some embodiments, as shown in fig. 11-15, the outer peripheral wall of the spring shaft 4271 is provided with a circumferential step, and the second end of the spring 4272 is sleeved on the spring shaft 4271 and stops against the circumferential step. Specifically, the spring shaft 4271 has a large diameter portion and a small diameter portion, and a circumferential step is formed at a junction of the large diameter portion and the small diameter portion. The diameter of the small diameter part is smaller than the inner diameter of the spring 4272, the diameter of the large diameter part is larger than the inner diameter of the spring 4272, and the second end of the spring 4272 is sleeved on the small diameter part and abuts against the circumferential step. The small diameter portion may guide the compression and extension of the spring 4272.

As shown in fig. 11 and 12, in some embodiments, the transmission disc 422 is provided on an outer circumferential surface thereof with a blind hole 4222 and a through hole 4223 communicating with an inner cavity of the hollow transmission shaft 421, the push rod 425 is movably fitted in the through hole 4223, and the spring 4272 and the spring shaft 4271 are installed in the blind hole 4222.

As shown in fig. 11 and 12, the spring 4272 and spring shaft 4271 are positioned in the blind bore 4222 with the first end of the spring 4272 abutting the bottom of the blind bore 4222. The second end of the spring shaft 4271 extends from the top of the blind bore 4222 (i.e., the outer peripheral surface of the drive plate 422) and abuts the second arm 4243. A first end of the push rod 425 protrudes from one end of the through hole 4223 (i.e., the outer circumferential surface of the transmission disc 422) and abuts against the first arm 4242. The second end of the push rod 425 protrudes from the other end of the through hole 4223 (i.e., the end communicating with the inner cavity of the hollow transmission shaft 421) and abuts against the cam portion 4261. The push rod 425 can move outward in the axial direction of the through hole 4223 by the drive of the cam portion 4261.

Optionally, both the through hole 4223 and the blind hole 4222 extend in the radial direction of the transmission disc 422. That is, both the axial direction of the plunger 425 and the axial direction of the restoring member 427 extend in the radial direction of the driving plate 422, whereby the structure of the clutch is more reasonable.

The ratchet gear 423 is mounted on the hollow transmission shaft 421 and can rotate around the hollow transmission shaft 421. In some embodiments, as shown in fig. 9, two bearings 428 are respectively mounted on the hollow transmission shaft 421 along the axial direction thereof, and the ratchet 423 is rotatably mounted on the hollow transmission shaft 421 through the two bearings 428.

In some embodiments, as shown in fig. 8 and 9, ratchet 423 includes a ratchet portion 4231 and a mounting shaft portion 4232, ratchet portion 4231 being integrally formed with mounting shaft portion 4232, ratchet portion 4231 being located behind mounting shaft portion 4232. The diameter of the mounting shaft portion 4232 is smaller than that of the ratchet portion 4231, and the drive sprocket 43 is mounted on the mounting shaft portion 4232 and rotates in synchronization with the ratchet 423.

In some embodiments, the clutch 42 further includes a connecting sleeve 429 and a connecting flange 4210, a first end of the connecting sleeve 429 being connected to the drive plate 422, and the connecting flange 4210 being mounted to a second end of the connecting sleeve 429. The connecting sleeve 429 and the hollow transmission shaft 421 are positioned on both sides of the transmission disc 422. I.e. the connecting sleeve 429 is located at the rear side of the driving disk 422 and connected with the driving disk 422, and the hollow driving shaft 421 is located at the front side of the driving disk 422 and connected with the driving disk 422. A coupling flange 4210 is located on the rear side of the coupling sleeve 429 and is connected to the coupling sleeve 429. The connecting sleeve 429 and the connecting flange 4210 serve to connect the clutch 42 to the wheel. Optionally, the diameter of the connection flange 4210 is larger than the diameter of the connection sleeve 429.

Optionally, a plurality of stiffening wings 4291 are provided on the outer circumferential surface of the connecting sleeve 429, the plurality of stiffening wings 4291 being spaced around the connecting sleeve 429. The plurality of reinforcement wings 4291 reinforce the structural strength of the clutch 42.

Further alternatively, the connection sleeve 429 is integrally formed with the connection flange 4210. By way of example, the hollow drive shaft 421, the drive disk 422, the adjusting shaft 426, the connecting sleeve 429 and the connecting flange 4210 are coaxial.

One specific example of the clutch 42 is described below with reference to fig. 8-15.

Specifically, the clutch 42 includes a hollow transmission shaft 421, a transmission disc 422, a ratchet 423, a pawl member 424, a push rod 425, an adjustment shaft 426, a return member 427, a bearing 428, a drive sprocket 43, a connecting sleeve 429 and a connecting flange 4210.

The hollow transmission shaft 421 and the transmission disc 422 are integrally formed, and the transmission disc 422 is positioned behind the hollow transmission shaft 421. The two bearings 428 are sleeved on the hollow transmission shaft 421, and the ratchet 423 is installed on the hollow transmission shaft 421 through the two bearings 428 and the hollow transmission shaft 421 is rotatable. The ratchet 423 includes a ratchet portion 4231 and a mounting shaft portion 4232, the ratchet portion 4231 is located behind the mounting shaft portion 4232, and the transmission disc 422 is located behind the ratchet portion 4231. The drive sprocket 43 is mounted on the mounting shaft portion 4232, and the drive sprocket 43 and the ratchet 423 are rotatable in synchronization.

The pawl member 424 is mounted on a mounting portion 4221 of the drive disk 422. The pawl member 424 includes a pawl seat 4241 and a pawl 4244 mounted on the pawl seat 4241, the pawl seat 4241 being pivotally mounted on the mounting portion 4221 by a pivot shaft 4245. The pawl seat 4241 has a first arm 4242 and a second arm 4243, the first arm 4242 is located on the same side of the pivot 4245 as the pawl 4244, and the pawl 4244 is located on opposite sides of the pivot 4245 as the second arm 4243.

A first end of the plunger 425 abuts the first arm 4242 and a second end of the restoring member 427 abuts the second arm 4243. The return member 427 includes a spring 4272 and a spring spindle 4271, with a second end of the spring 4272 resting against a first end of the spring spindle 4271 and a second end of the spring spindle 4271 resting against the pawl seat 4241. The outer peripheral surface of the transmission disc 422 is provided with a blind hole 4222 and a through hole 4223 communicated with the inner cavity of the hollow transmission shaft 421, the push rod 425 is movably matched in the through hole 4223, and the spring 4272 and the spring shaft 4271 are installed in the blind hole 4222.

An adjustment shaft 426 is rotatably fitted within the hollow drive shaft 421, the adjustment shaft 426 having a cam portion 4261 along the circumferential direction of the adjustment shaft 426. The cam portion 4261 has a farthest point a farthest from the center of the cam portion 4261 and a closest point b closest to the center of the cam portion 4261. The adjustment shaft 426 also has a first step 4262 corresponding to the distal-most point a and a second step 4263 corresponding to the proximal-most point b. The second end of the push rod 425 is slidable relative to the outer peripheral surface of the cam portion 4261 while always abutting against the cam portion 4261. The cam portion 4261 further includes an adjustment portion 4264 extending out of the hollow transmission shaft 421. A connecting sleeve 429 is located behind the driving disk 422 and is connected to the driving disk 422, and a connecting flange 4210 is located behind the connecting sleeve 429 and is connected to the connecting sleeve 429.

In some embodiments, the clutch 42 is mounted on at least one rear wheel 12. As shown in fig. 2 and 6, the clutch 42 is mounted on the right rear wheel 12, and the clutch 42 is coaxial with the rear wheel 12. When the materials in the carriage 2 need to be discharged and distributed, the carriage 2 is turned to the lifting position, and the pawl 4244 in the clutch 42 is meshed with the ratchet wheel 423. When the dump truck 100 moves forward, the rear wheel 12 rotates clockwise, at this time, the clutch 42 is in a transmission state, the clutch 42 transmits the driving force of the rear wheel 12 to the driving sprocket 43, so that the driving sprocket 43 is driven to rotate, and finally the distributing roller 3 is driven to rotate to realize distributing. If the dump truck 100 moves backward and the rear wheel 12 rotates counterclockwise, the clutch 42 is in a non-transmission state, the driving force of the rear wheel 12 is disconnected by the clutch 42 and transmitted to the driving sprocket 43, and the dump truck 100 does not perform material discharge.

If the pawl 4244 and the ratchet wheel 423 in the clutch 42 are adjusted to be in a disengaged state, that is, the clutch 42 is in a free state, no matter the dump truck 100 travels forwards or backwards, the clutch 42 cannot transmit power to the driving sprocket 43, that is, the driving sprocket 43 cannot be driven by the rear wheel 12, and thus the distributing roller 3 cannot rotate. Since the clutch 42 can be conveniently switched among the transmission state, the non-transmission state and the free state, the dump truck 100 can be more conveniently controlled, so that the application of the material distribution function of the dump truck 100 is more reasonable and convenient.

For example, by using the wheels 12 as the source of the driving force of the distributing roller 3 and providing the clutch 42 to the wheels 12, the distributing roller 3 is driven to distribute the material when the dump truck 100 moves forward, the driving force of the wheels is not transmitted to the distributing roller 3 when the dump truck 100 moves backward, and the material is not distributed, and the clutch can be adjusted to a free state when the dump truck is unloaded or used only as a transport vehicle, for example, whereby the applicability of the dump truck is improved.

In some embodiments, as shown in fig. 2, the dump truck 100 further comprises a dust cover 5 and a dust cloth 6. The dust cover 5 is provided at the discharge opening 21. The dustproof cloth 6 is respectively arranged at the front side and the rear side of the cloth roller 3. The dust cover 5 and the dustproof cloth 6 are arranged to prevent the materials from generating dust to pollute the construction environment when the materials are distributed, and the dust cover 5 and the dustproof cloth 6 can effectively prevent the dust of the materials.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A dump truck, comprising: automobile body, wheel, carriage and cloth roller, the carriage is installed on the automobile body and can overturn between lifting up the position and putting the flat position, the back wall bottom in carriage has the discharge opening, clothThe material roller is rotatably arranged on the carriage and is close to the discharge opening, the distributing roller is used for distributing the materials in the carriage on the ground, the highest point of the peripheral surface of the distributing roller is higher than the inner bottom surface of the carriage when the carriage is positioned at the leveling position, and h ═ x r x L₁) V, where h is the thickness of the cloth in millimeters, ω is the angular velocity of the cloth roller in radians per second, r is the radius of the cloth roller in millimeters, L₁The distance from the upper edge of the discharge opening to the horizontal plane where the highest point of the peripheral surface of the distributing roller is located is represented by millimeters, and V is the vehicle speed and is represented by meters per minute.

2. The dump truck of claim 1, wherein L is₁Not less than 30 mm.

3. The dump truck according to claim 2, wherein V is 30 to 400 m/min, 0.5 rad/sec ≦ ω ≦ 6 rad/sec, and 175 mm ≦ r ≦ 325 mm.

4. The dump truck according to claim 3, wherein an included angle between a connecting line of a circle center of the distributing roller and a vertical direction and an intersection point of the inner bottom surface of the carriage and the outer peripheral surface of the distributing roller satisfies 0 degree to 25 degrees.

5. The dump truck according to claim 1, wherein:

wherein L is₂The distance from the upper edge of the discharge opening to the inner bottom surface of the carriage is in millimeter unit, alpha is an included angle between a connecting line of the intersection point of the outer bottom surface of the carriage and the outer peripheral surface of the distributing roller and the circle center of the distributing roller and the vertical direction, lambda is a coefficient, s is the length of the discharge opening in the axial direction of the distributing roller, in millimeter unit, and g is gravityConstant in units of meters per second squared.

6. The dump truck according to any one of claims 1 to 5, further comprising a driving device for driving the distribution roller to rotate, wherein the driving device comprises:

the driven chain wheel is arranged on the roll neck of the distributing roll;

a clutch mounted on the wheel;

the driving chain wheel is arranged on the clutch, and the clutch is used for transmitting the driving force of the wheel to the driving chain wheel or disconnecting the transmission of the driving force of the wheel to the driving chain wheel;

a chain connected between the drive sprocket and the driven sprocket;

a guide sprocket mounted on the vehicle body;

the first end of the counterweight rod is provided with a counterweight, and the second end of the counterweight rod is provided with a tensioning chain wheel;

the chain is arranged on the mounting frame of the distributing roller, and the chain sequentially bypasses the guide chain wheel, the driven chain wheel, the first direction changing chain wheel, the second direction changing chain wheel and the tensioning chain wheel from the driving chain wheel.

7. The dump truck of claim 6, wherein the clutch comprises:

a hollow transmission shaft;

the transmission disc is arranged on the hollow transmission shaft and is connected with the wheels;

the ratchet wheel is rotatably arranged on the hollow transmission shaft, and the driving chain wheel is connected with the ratchet wheel so as to synchronously rotate with the ratchet wheel;

the pawl component comprises a pawl seat and a pawl arranged on the pawl seat, and the pawl seat is arranged on the transmission disc and can pivot between an engagement position where the pawl is engaged with the ratchet wheel and a disengagement position where the pawl is disengaged from the ratchet wheel;

the push rod is provided with a first end and a second end, and the first end of the push rod is abutted to the pawl seat;

the adjusting shaft is rotatably matched in the hollow transmission shaft and is provided with a cam part, and a second end of the push rod is abutted against the cam part so that the cam part drives the push rod to push the pawl seat towards one of the engagement position and the disengagement position through rotation;

and the first end of the resetting component is connected with the transmission disc, the second end of the resetting component is abutted against the pawl seat, and the resetting component is used for pushing the pawl seat towards one of the engaging position and the disengaging position.

8. The dump truck according to claim 7, wherein the pawl seat comprises a first arm and a second arm, the first arm and the second arm are located on both sides of a pivot center of the pawl seat, a first end of the push rod abuts against the first arm, a second end of the reset member abuts against the second arm, the push rod pushes the pawl seat to the disengaged position when the second end of the push rod abuts against a farthest point from a center of the cam portion, and the reset member pushes the pawl seat to the engaged position when the second end of the push rod abuts against a closest point from the center of the cam portion.

9. The dump truck according to claim 7, wherein the cam portion is formed by removing a portion of the adjusting shaft in the circumferential direction of the adjusting shaft, and the cam portion forms a first step and a second step on both sides of the adjusting shaft in the circumferential direction, respectively, the adjusting shaft includes an adjusting portion extending from inside the hollow transmission shaft, the restoring member includes a spring and a spring shaft, a first end of the spring is connected to the transmission disc, a second end of the spring abuts against a first end of the spring shaft, a second end of the spring shaft abuts against the pawl seat, a circumferential step is provided on an outer circumferential wall of the spring shaft, and a second end of the spring is sleeved on the spring shaft and abuts against the circumferential step.

10. The dump truck according to claim 9, wherein a blind hole and a through hole communicating with the inner cavity of the hollow transmission shaft are provided on the outer peripheral surface of the transmission disc, the push rod is movably fitted in the through hole, and the spring shaft are installed in the blind hole.