A concrete mixer for road construction

Abstract

The invention relates to the field of road construction equipment, and in particular to a concrete mixer for road construction, which mainly solves the problems of poor mixing convenience and low mixing efficiency of concrete mixers in the prior art. The invention comprises a frame, a bracket, a steering handle, a steering wheel, a walking mechanism, a control system, a diesel generator, a battery, a mixing mechanism and a feeding mechanism. The mixing mechanism comprises a first driving motor, a second driving motor, a first transmission assembly, a second transmission assembly, a guide assembly, an upper mixing cylinder, a lower mixing cylinder, a mixing cover, a first mixing shaft, at least two second mixing shafts, a plurality of groups of first mixing assemblies, a plurality of groups of second mixing assemblies, a fixed plate, a movable plate, a push rod, a convex block and a tension spring. The lower mixing cylinder is fixedly arranged on the bracket, a discharging port is arranged at the lower end of the lower mixing cylinder, an electric switch valve is arranged at the discharging port, the upper mixing cylinder is rotatably arranged on the lower mixing cylinder, and a sealing assembly is arranged between the upper mixing cylinder and the lower mixing cylinder.

Description

Technical Field

[0001] The invention relates to the field of road construction equipment, in particular to a concrete mixer for road construction. Background Art

[0002] A concrete mixer is a machine that mixes cement, sand and gravel aggregates and water to make a concrete mixture. The structure of the existing concrete mixer, such as Chinese patent announcement number CN214925649U discloses an automatic concrete mixer, specifically discloses an automatic concrete mixer, including a body, a base is fixed at the edge position of the bottom of the body, and a plurality of lifting devices are arranged in the bottom of the body. A connecting plate is arranged at the end of the lifting device away from the body, and a pulley is rotatably connected to the end of the connecting plate away from the lifting device. When in use, when the operator needs to move the concrete mixer, the lifting device drives the connecting plate to extend the pulley from the bottom of the body, and the pulley is raised to the bottom of the base. At this time, the pulley is supported by the ground, and the concrete mixer is driven to move on the ground through the rolling of the pulley, which is convenient for the operator to move the position of the concrete mixer with effort; when the operator moves the concrete mixer to a suitable position, the lifting device is used to lower the pulley to the top of the base, so that the base is in contact with the ground, and the stability of the concrete mixer during operation is ensured.

[0003] However, it was found during use that when there is less material, the material is deposited at the bottom of the stirring cavity, and the stirring blades have difficulty acting on the material, and stirring cannot be achieved, resulting in poor convenience of use. In addition, for this type of horizontal structure mixer, the stirring blades are distributed side by side in the horizontal direction. During the stirring process, the area of ​​the stirring blades acting on the material is small, making it difficult to form effective stirring and the stirring efficiency is low. Summary of the invention

[0004] Therefore, in view of the above problems, the present invention provides a concrete mixer for road construction, which mainly solves the problems of poor mixing convenience and low mixing efficiency of the concrete mixer in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A concrete mixer for road construction, comprising a frame, a bracket, a steering handle, a steering wheel, a traveling mechanism, a control system, a diesel generator, a battery, a stirring mechanism and a feeding mechanism, wherein the longitudinal direction extending along the length direction of the frame is defined as a longitudinal direction, and the transverse direction extending along the width direction of the frame is defined as a transverse direction, the bracket is fixedly arranged on the frame, the steering handle is rotatably arranged on one longitudinal side of the frame and the bracket, the steering wheel is arranged at the lower end of the steering handle, the traveling mechanism is arranged at the lower part of the frame and distributed on the other longitudinal side, the control system, the diesel generator, the battery and the feeding mechanism are respectively arranged on the frame, the stirring mechanism is arranged on the bracket and connected to the feeding mechanism, and the traveling mechanism, the diesel generator, the battery, the stirring mechanism and the feeding mechanism are respectively electrically connected to the control system;

[0007] The stirring mechanism includes a first driving motor, a second driving motor, a first transmission assembly, a second transmission assembly, a guide assembly, an upper stirring cylinder, a lower stirring cylinder, a stirring cover, a first stirring shaft, at least two second stirring shafts, a plurality of first stirring assemblies, a plurality of second stirring assemblies, a fixed plate, a movable plate, a push rod, a convex block and a tension spring. The lower stirring cylinder is fixedly mounted on the bracket, a discharge port is provided at the lower end of the lower stirring cylinder, an electric switch valve is provided at the discharge port, the upper stirring cylinder is rotatably mounted on the lower stirring cylinder, and the upper stirring cylinder and the stirring cylinder are connected to the stirring cylinder. A sealing assembly is provided between the lower cylinders, a feed port is provided on the side wall of the stirring upper cylinder, a cover plate is provided at the feed port, the guide assembly is provided between the stirring upper cylinder and the bracket, and is used to support the stirring upper cylinder, the first driving motor is connected to the stirring upper cylinder through the first transmission assembly, the stirring cover is provided on the stirring upper cylinder, the stirring lower cylinder, the stirring upper cylinder and the stirring cover form a stirring chamber, the first stirring shaft is rotatably provided on the stirring cover through a bearing, and one end extends into the stirring chamber, and the included angle between the central axis of the first stirring shaft and the horizontal plane is 30 °~60°, the second driving motor is connected to the outer end of the first stirring shaft through the second transmission component, each of the first stirring components is arranged at the inner end of the first stirring shaft at intervals along the axial direction of the first stirring shaft, the protrusion is arranged on the lower surface of the stirring cover, the protrusion is annular in structure, the thickness dimension of one lateral side of the protrusion is greater than the thickness dimension of the other lateral side of the protrusion, so that the lower surface of the protrusion forms an annular guide surface with a height difference, the fixed plate is fixedly arranged at the inner end of the first stirring shaft and distributed on the lower side of the protrusion, and the fixed plate is provided with guide holes A through hole is provided at the center of the movable plate, and the movable plate is sleeved on the inner end of the first stirring shaft through the through hole and is distributed on the lower side of the fixed plate. The tension spring is sleeved on the first stirring shaft, and the two ends of the tension spring are respectively connected to the fixed plate and the movable plate. The lower end of the push rod is hinged to the upper surface of the movable plate, and the upper end of the push rod passes through the guide hole and abuts against the annular guide surface. The upper ends of the second stirring shafts are respectively vertically arranged on the lower surface of the movable plate and are distributed around the circumference of the first stirring shaft. The second stirring components are respectively arranged on each second stirring shaft.

[0008] Furthermore, the rotation direction along the first stirring shaft is defined as the stirring direction, and the first stirring component has a front end and a rear end along the stirring direction. The first stirring component includes a mounting sleeve fixedly mounted on the first stirring shaft, a support rod vertically arranged on the outer surface of the mounting sleeve, and a first stirring blade fixedly mounted on the support rod. The first stirring blade includes a first base with a curved structure and a first cutting plate locked at the front end of the first base, and the concave surface of the first base faces upward.

[0009] Furthermore, an outer end of the first base is provided with an arc-shaped edge.

[0010] Furthermore, a first strip groove is provided on the first base and located on the upper side of the first cutting plate.

[0011] Furthermore, the second stirring assembly includes at least two second stirring blades spaced apart along the axial direction of the second stirring shaft, the second stirring blade includes a second base with a curved structure and a second cutting plate locked to the front end of the second base, and the concave surface of the second base faces the first stirring shaft.

[0012] Furthermore, a second strip groove is provided on the second base and at the rear side of the second cutting plate.

[0013] Furthermore, at least three third stirring blades are arranged around the inner surface of the stirring upper cylinder, and each of the third stirring blades is distributed along the axial direction of the stirring upper cylinder.

[0014] Furthermore, the sealing assembly includes a convex ring convexly arranged on the lower end of the stirring upper cylinder, a first sealing groove concavely arranged on the outer surface of the convex ring, a sealing ring embedded in the first sealing groove, a support ring fixed on the outer surface of the stirring upper cylinder, a bearing, a sealing ring and a locking bolt, a threaded hole is provided on the upper part of the stirring lower cylinder, the locking bolt passes through the threaded hole to fix the sealing ring, a second sealing groove is concavely arranged on the inner surface of the sealing ring, the convex ring and the sealing ring are embedded in the second sealing groove, the stirring upper cylinder, the stirring lower cylinder, the sealing ring and the support ring form an installation groove, the bearing is arranged in the installation groove, the sealing ring includes a sealing ring body, an annular groove is opened on the sealing ring body, a metal ring is embedded in the annular groove, and the sealing ring body is abutted against the surface of the second sealing groove through the metal ring.

[0015] Furthermore, the unloading mechanism includes a third driving motor, a unloading shell, a unloading shaft, unloading blades and a unloading nozzle. The unloading shell is provided with a feed end and a discharge end. The feed end of the unloading shell is connected to the discharge port. The unloading shaft is rotatably disposed in the unloading shell. The third driving motor is connected to the unloading shaft. The unloading blades are disposed on the unloading shaft and distributed in the unloading shell. The unloading blades are in a spiral structure. The unloading nozzle is disposed at the discharge end of the unloading shell.

[0016] Furthermore, the guide assembly includes a supporting wheel arranged on the bracket and an annular guide rail arranged on the outer surface of the stirring upper cylinder, the annular guide rail has a guide groove, and the supporting wheel is embedded in the guide groove.

[0017] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: when the concrete mixer for road construction is used, the diesel generator is started to charge the battery, and the travel mechanism is controlled by the control system to drive the frame to the place to be poured, and the material is poured into the mixing chamber through the feed port, and then the feed port is sealed by the cover plate. The control system controls the first drive motor and the second drive motor to start respectively, thereby driving the first mixing shaft and the mixing upper drum to rotate. The rotation of the mixing upper drum can drive the material in the mixing chamber to turn over, and the rotation of the first mixing shaft drives the fixed plate, the movable plate and the first mixing assembly to rotate, so that the first mixing assembly mixes the material, and the second mixing shaft makes a circular motion along the first mixing shaft, thereby driving the second mixing assembly on the second mixing shaft to mix the material. Stirring, at the same time, the fixed plate and the movable plate are connected by a tension spring, so that the upper end of the push rod hinged on the movable plate is always against the annular guide surface of the protrusion, so as to realize the swing of the movable plate, and then drive the second stirring shaft and the second stirring assembly to swing, and cooperate with the setting of the angle between the central axis of the first stirring shaft and the horizontal plane is 30°~60°, so as to realize the swing stirring of the second stirring shaft, and adhere to the inner surface of the stirring upper cylinder and the stirring lower cylinder, so that the material at the bottom can be stirred as much as possible, so that the stirring uniformity is good and the stirring efficiency is high, and the discharge port is opened by controlling the electric switch valve to allow the material to enter the unloading mechanism, and the material is unloaded and poured through the unloading mechanism, and at the same time, with the setting of the walking mechanism and the steering wheel, the frame can be miniaturized and moved, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 is a partial front view structural schematic diagram of a stirring mechanism in an embodiment of the present invention;

[0020] Figure 3 is a partial cross-sectional structural schematic diagram of a stirring mechanism in an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a top view of the structure of a first stirring shaft, a second stirring shaft, a first stirring assembly, and a second stirring assembly in an embodiment of the present invention;

[0022] Figure 5 yes Figure 3 A partial enlarged view of the middle A;

[0023] Figure 6 Schematic diagram of the cross-sectional structure of the blanking mechanism in the embodiment of the present invention;

[0024] Figure 7 It is a circuit module diagram of an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Frame; 2. Bracket; 3. Steering handle; 4. Steering wheel; 5. Travel mechanism; 6. Control system; 7. Diesel generator; 8. Battery; 9. Mixing mechanism; 20. Unloading mechanism; 21. Third mixing blade;

[0027] 91. First drive motor; 92. Second drive motor; 93. First transmission assembly; 94. Second transmission assembly; 95. Guide assembly; 96. Stirring upper cylinder; 97. Stirring lower cylinder; 98. Stirring cover; 99. First stirring shaft; 100. Second stirring shaft; 101. First stirring assembly; 102. Second stirring assembly; 103. Fixed plate; 104. Movable plate; 105. Ejector rod; 106. Bump; 107. Tension spring; 108. Discharge port; 109. Electric switch valve;

[0028] 110, sealing assembly; 111, convex ring; 112, first sealing groove; 113, sealing ring; 114, supporting ring; 115, bearing; 116, sealing collar; 117, locking bolt; 118, threaded hole; 119, second sealing groove; 120, feed inlet; 121, cover plate; 122, guide hole; 123, through hole; 130, stirring chamber; 140, annular guide surface;

[0029] 201, third driving motor; 202, material discharging housing; 203, material discharging shaft; 204, material discharging blade; 205, material discharging nozzle; 206, material feeding end; 207, material discharging end;

[0030] 310, mounting sleeve; 320, support rod; 330, first stirring blade; 331, first base; 332, first cutting plate; 333, arc-shaped edge; 334, first strip groove; 410, second stirring blade; 411, second base; 412, second cutting plate; 413, second strip groove; 510, sealing ring body; 520, annular groove; 530, metal ring; 951, support wheel; 952, annular guide rail; 953, guide groove. DETAILED DESCRIPTION

[0031] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0032] The embodiments of the present invention are:

[0033] refer to Figures 1 to 7As shown, a concrete mixer for road construction includes a frame 1, a bracket 2, a steering handle 3, a steering wheel 4, a traveling mechanism 5, a control system 6, a diesel generator 7, a battery 8, a stirring mechanism 9 and a feeding mechanism 20. The longitudinal direction extending along the length direction of the frame 1 is defined as the longitudinal direction, and the width direction extending along the frame 1 is defined as the transverse direction. The bracket 2 is fixedly arranged on the frame 1, the steering handle 3 is rotatably arranged on one longitudinal side of the frame 1 and the bracket 2, the steering wheel 4 is arranged at the lower end of the steering handle 3, the traveling mechanism 5 is arranged at the lower part of the frame 1 and distributed on the other longitudinal side, the control system 6, the diesel generator 7, the battery 8 and the feeding mechanism 20 are respectively arranged on the frame 1, the stirring mechanism 9 is arranged on the bracket 2 and connected to the feeding mechanism 20, and the traveling mechanism 5, the diesel generator 7, the battery 8, the stirring mechanism 9 and the feeding mechanism 20 are respectively electrically connected to the control system 6;

[0034] The stirring mechanism 9 includes a first drive motor 91, a second drive motor 92, a first transmission assembly 93, a second transmission assembly 94, a guide assembly 95, a stirring upper cylinder 96, a stirring lower cylinder 97, a stirring cover 98, a first stirring shaft 99, four second stirring shafts 100, four groups of first stirring assemblies 101, four groups of second stirring assemblies 102, a fixed plate 103, a movable plate 104, a push rod 105, a convex block 106 and a tension spring 107. The stirring lower cylinder 97 is fixedly mounted on the bracket 2. A discharge port 108 is provided at the lower end of the stirring lower cylinder 97. An electric switch valve 109 is provided at the discharge port 108. The stirring upper cylinder 96 is rotatably mounted on the stirring lower cylinder 97. The stirring upper cylinder 96 A sealing assembly 110 is provided between the stirring lower cylinder 97 and the stirring upper cylinder 96, a feed port 120 is provided on the side wall of the stirring upper cylinder 96, and a cover plate 121 is provided at the feed port 120, the guide assembly 95 is provided between the stirring upper cylinder 96 and the bracket 2, and is used to support the stirring upper cylinder 96, the first driving motor 91 is connected to the stirring upper cylinder 96 through the first transmission assembly 93, the stirring cover 98 is covered on the stirring upper cylinder 96, the stirring lower cylinder 97, the stirring upper cylinder 96 and the stirring cover 98 surround a stirring chamber 130, the first stirring shaft 99 is rotatably penetrated on the stirring cover 98 through a bearing, and one end extends into the stirring chamber 130, and the included angle between the central axis of the first stirring shaft 99 and the horizontal plane is 30° to 6 0°, preferably 45°, the second drive motor 92 is connected to the outer end of the first stirring shaft 99 through the second transmission assembly 94, each of the first stirring assemblies 101 is arranged at the inner end of the first stirring shaft 99 along the axial direction of the first stirring shaft 99, the protrusion 106 is arranged on the lower surface of the stirring cover 98, the protrusion 106 is annular, the thickness of one side of the protrusion 106 is greater than the thickness of the other side of the protrusion 106, so that the lower surface of the protrusion 106 forms an annular guide surface 140 with a height difference, the fixed plate 103 is fixed to the inner end of the first stirring shaft 99, and is distributed on the lower side of the protrusion 106, the fixed plate 103 is provided with a guide hole 122, the movable A through hole 123 is provided at the center of the movable plate 104, and the movable plate 104 is sleeved on the inner end of the first stirring shaft 99 through the through hole 123, and is distributed on the lower side of the fixed plate 103, the tension spring 107 is sleeved on the first stirring shaft 99, and the two ends of the tension spring 107 are respectively connected to the fixed plate 103 and the movable plate 104, the lower end of the push rod 105 is hinged to the upper surface of the movable plate 104, and the upper end of the push rod 105 passes through the guide hole 122 and abuts against the annular guide surface 140, the upper ends of each of the second stirring shafts 100 are respectively vertically arranged on the lower surface of the movable plate 104, and are distributed around the circumference of the first stirring shaft 99, and each of the second stirring components 102 is respectively arranged on each second stirring shaft 100.

[0035] When the concrete mixer for road construction is used, the diesel generator 7 is started to charge the battery 8, and the travel mechanism 5 is controlled to operate through the control system 6, the frame 1 is driven to the place to be poured, and the material is poured into the mixing chamber 130 through the feed port 120, and then the feed port 120 is sealed by the cover plate 121, and the control system 6 controls the first drive motor 91 and the second drive motor 92 to start respectively, thereby driving the first mixing shaft 99 and the mixing upper cylinder 96 to rotate, and the rotation of the mixing upper cylinder 96 can drive the material in the mixing chamber 130 to turn over, and the rotation of the first mixing shaft 99 drives the fixed plate 103, the movable plate 104 and the first mixing component 101 to rotate, so that the first mixing component 101 mixes the material, and the second mixing shaft 100 makes a circular motion along the first mixing shaft 99, thereby driving the second mixing component 102 on the second mixing shaft 100 to mix the material, and at the same time, by pulling The spring 107 connects the fixed plate 103 and the movable plate 104, so that the upper end of the push rod 105 hinged on the movable plate 104 always rests on the annular guide surface 140 of the protrusion 106, thereby realizing the swing of the movable plate 104, and then driving the second stirring shaft 100 and the second stirring assembly 102 to swing, and cooperate with the setting of the angle between the central axis of the first stirring shaft 99 and the horizontal plane is 30°~60°, so as to realize the swing stirring of the second stirring shaft 100, and adhere to the inner surface of the stirring upper cylinder 96 and the stirring lower cylinder 97, so that the material at the bottom can be stirred as much as possible, so that the stirring uniformity is good and the stirring efficiency is high, and the discharge port 108 is opened by controlling the electric switch valve 109, so that the material enters the unloading mechanism 20, and is unloaded and poured through the unloading mechanism 20, and at the same time, cooperate with the setting of the walking mechanism 5 and the steering wheel 4, so that the frame 1 can be miniaturized and moved, and the convenience of use is improved.

[0036] Furthermore, the first stirring assembly 101 is defined as a stirring direction along the rotation direction of the first stirring shaft 99 and has a front end and a rear end along the stirring direction. The first stirring assembly 101 includes a mounting sleeve 310 fixedly mounted on the first stirring shaft 99, a support rod 320 vertically mounted on the outer surface of the mounting sleeve 310, and a first stirring blade 330 fixedly mounted on the support rod 320. The first stirring blade 330 includes a first base 331 with a curved surface structure and a first cutting plate 332 locked at the front end of the first base 331. The concave surface of the first base 331 faces upward, and the outer end of the first base 331 is provided with an arc-shaped edge 333. The first base 331 A first strip groove 334 is provided on and located on the upper side of the first cutting plate 332; the second stirring assembly 102 includes two second stirring blades 410 spaced apart along the axial direction of the second stirring shaft, the second stirring blade 410 includes a second base 411 with a curved structure and a second cutting plate 412 locked at the front end of the second base 411, the concave surface of the second base 411 faces the first stirring shaft 99, and a second strip groove 413 is provided on the second base 411 and located on the rear side of the second cutting plate 412, the first stirring blades 330 and the second stirring blades 410 are staggered along the axial direction of the first stirring shaft 99.

[0037] The first stirring shaft 99 drives the first stirring blade 330 to rotate, and the first cutting plate 332 on the first stirring blade 330 cuts the material to achieve better material separation. The material on the upper side of the first cutting plate 332 slides along the first base 331 with a curved surface structure to push the material upward and outward. At the same time, the second stirring shaft 100 moves in a circular motion around the first stirring shaft 99, and the second cutting plate 412 on the second stirring blade 410 cuts the material to achieve better material separation. The material on the inner side of the second cutting plate 412 slides along the second base 411 with a curved surface structure to achieve material The material is pushed inward. Such a design allows the material to surge rapidly in the stirring chamber 130, thereby improving the uniformity of stirring. The arc edge 333 arranged at the outer end of the first base 331 can reduce the resistance of the material and reduce energy consumption. At the same time, the first strip groove 334 arranged on the first base 331 and the second strip groove 413 arranged on the second base 411 can allow a part of the material to pass through the strip groove flow channel when pushing the material. The surrounding travel cavity area of ​​the material passing through the strip groove is squeezed into the surrounding material and collides and mixes with the material passing through the strip groove, thereby improving the uniformity of mixing.

[0038] Furthermore, at least three third stirring blades 21 are provided around the inner surface of the stirring upper cylinder 96, preferably eight, and each of the third stirring blades 21 is distributed along the axial direction of the stirring upper cylinder 96, so that during the rotation of the stirring upper cylinder 96, the third stirring blades 21 can stir the material in the stirring chamber 130, thereby further improving the stirring efficiency.

[0039] Specifically, the guide assembly 95 includes a support wheel 951 arranged on the bracket 2 and an annular guide rail 952 arranged on the outer surface of the stirring upper cylinder 96. The annular guide rail 952 has a guide groove 953, and the support wheel 951 is embedded in the guide groove 953 to improve the rotation stability of the stirring upper cylinder 96.

[0040] In this embodiment, the sealing assembly 110 includes a convex ring 111 convexly arranged at the lower end of the stirring upper cylinder 96, a first sealing groove 112 concavely arranged on the outer surface of the convex ring 111, a sealing ring 113 embedded in the first sealing groove 112, a support ring 114 fixed on the outer surface of the stirring upper cylinder 96, a bearing 115, a sealing ring 116 and a locking bolt 117, and a threaded hole 118 is provided on the upper part of the stirring lower cylinder 97, and the locking bolt 117 passes through the threaded hole 118 to fix the sealing ring 116, and the inner surface of the sealing ring 116 is A second sealing groove 119 is recessed, the convex ring 111 and the sealing ring 113 are embedded in the second sealing groove 119, the upper stirring cylinder 96, the lower stirring cylinder 97, the sealing sleeve 116 and the support ring 114 form a mounting groove, the bearing 115 is arranged in the mounting groove, the sealing ring 113 includes a sealing ring body 510, an annular groove 520 is opened on the sealing ring body 510, a metal ring 530 is embedded in the annular groove 520, and the sealing ring body 510 is pressed against the surface of the second sealing groove 119 through the metal ring 530.

[0041] The metal ring 530 is embedded in the annular groove 520 of the sealing body 510, so that the sealing ring body 510 is deformed, thereby abutting against the surface of the second sealing groove 119 of the sealing ring 116, and the convex ring 111 and the sealing ring 113 are embedded in the second sealing groove 119 of the sealing ring groove 116, so that the connection and sealing performance between the stirring upper cylinder 96 and the stirring lower cylinder 97 are good, thereby effectively protecting the bearings and improving the service life. The stirring upper cylinder 96, the stirring lower cylinder 97, the sealing ring 116 and the support ring 114 are arranged to form an installation groove, and the bearing 115 is arranged in the installation groove to improve the support strength, so that the operation stability of the stirring upper cylinder 96 is good.

[0042] In this embodiment, the unloading mechanism 20 includes a third drive motor 201, a unloading shell 202, a unloading shaft 203, unloading blades 204 and a unloading nozzle 205. The unloading shell 202 is provided with a feed end 206 and a discharge end 207. The feed end 206 of the unloading shell 202 is connected to the discharge port 108. The unloading shaft 203 is rotatably arranged in the unloading shell 202. The third drive motor 201 is connected to the unloading shaft 203. The unloading blades 204 are arranged on the unloading shaft 203 and distributed in the unloading shell 202. The unloading blades 204 are in a spiral structure. The unloading nozzle 205 is arranged at the discharge end 207 of the unloading shell 202. The third drive motor 201 drives the unloading shaft 203 to rotate, and the material is squeezed out through the unloading blades 204 on the unloading shaft 203, so that precise unloading can be achieved, and the material is guided by the unloading nozzle 205, so that the unloading of the material is stable.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A concrete mixer for road construction, characterized in that: It includes a frame, a bracket, a steering handle, a steering wheel, a traveling mechanism, a control system, a diesel generator, a battery, a stirring mechanism and a feeding mechanism. The longitudinal direction is defined as the longitudinal direction, and the width direction is defined as the transverse direction. The bracket is fixed on the frame, the steering handle is rotatably arranged on one longitudinal side of the frame and the bracket, the steering wheel is arranged at the lower end of the steering handle, the traveling mechanism is arranged at the lower part of the frame and distributed on the other longitudinal side, the control system, the diesel generator, the battery and the feeding mechanism are respectively arranged on the frame, the stirring mechanism is arranged on the bracket and connected to the feeding mechanism, and the traveling mechanism, the diesel generator, the battery, the stirring mechanism and the feeding mechanism are respectively electrically connected to the control system; The stirring mechanism includes a first driving motor, a second driving motor, a first transmission assembly, a second transmission assembly, a guide assembly, an upper stirring cylinder, a lower stirring cylinder, a stirring cover, a first stirring shaft, at least two second stirring shafts, a plurality of first stirring assemblies, a plurality of second stirring assemblies, a fixed plate, a movable plate, a push rod, a convex block and a tension spring. The lower stirring cylinder is fixedly mounted on the bracket, a discharge port is provided at the lower end of the lower stirring cylinder, an electric switch valve is provided at the discharge port, the upper stirring cylinder is rotatably mounted on the lower stirring cylinder, and the upper stirring cylinder and the stirring cylinder are connected to the stirring cylinder. A sealing assembly is provided between the lower cylinders, a feed port is provided on the side wall of the stirring upper cylinder, a cover plate is provided at the feed port, the guide assembly is provided between the stirring upper cylinder and the bracket, and is used to support the stirring upper cylinder, the first driving motor is connected to the stirring upper cylinder through the first transmission assembly, the stirring cover is provided on the stirring upper cylinder, the stirring lower cylinder, the stirring upper cylinder and the stirring cover form a stirring chamber, the first stirring shaft is rotatably provided on the stirring cover through a bearing, and one end extends into the stirring chamber, and the included angle between the central axis of the first stirring shaft and the horizontal plane is 30 °~60°, the second driving motor is connected to the outer end of the first stirring shaft through the second transmission component, each of the first stirring components is arranged at the inner end of the first stirring shaft at intervals along the axial direction of the first stirring shaft, the protrusion is arranged on the lower surface of the stirring cover, the protrusion is annular in structure, the thickness dimension of one lateral side of the protrusion is greater than the thickness dimension of the other lateral side of the protrusion, so that the lower surface of the protrusion forms an annular guide surface with a height difference, the fixed plate is fixedly arranged at the inner end of the first stirring shaft and distributed on the lower side of the protrusion, and the fixed plate is provided with guide holes A through hole is provided at the center of the movable plate, and the movable plate is sleeved on the inner end of the first stirring shaft through the through hole and is distributed on the lower side of the fixed plate. The tension spring is sleeved on the first stirring shaft, and the two ends of the tension spring are respectively connected to the fixed plate and the movable plate. The lower end of the push rod is hinged to the upper surface of the movable plate, and the upper end of the push rod passes through the guide hole and abuts against the annular guide surface. The upper ends of the second stirring shafts are respectively vertically arranged on the lower surface of the movable plate and are distributed around the circumference of the first stirring shaft. The second stirring components are respectively arranged on each second stirring shaft.

2. The road construction concrete mixer according to claim 1, characterized in that: The rotation direction along the first stirring shaft is defined as the stirring direction, and the stirring component has a front end and a rear end along the stirring direction. The first stirring component includes a mounting sleeve fixedly mounted on the first stirring shaft, a support rod vertically arranged on the outer surface of the mounting sleeve, and a first stirring blade fixedly mounted on the support rod. The first stirring blade includes a first base with a curved structure and a first cutting plate locked at the front end of the first base, and the concave surface of the first base faces upward.

3. The road construction concrete mixer according to claim 2, characterized in that: The outer end of the first base is provided with an arc-shaped edge.

4. The road construction concrete mixer according to claim 3, characterized in that: A first strip groove is provided on the first base and located on the upper side of the first cutting plate.

5. The road construction concrete mixer according to claim 2, characterized in that: The second stirring assembly includes at least two second stirring blades spaced apart along the axial direction of the second stirring shaft, the second stirring blade includes a second base with a curved structure and a second cutting plate locked at the front end of the second base, and the concave surface of the second base faces the first stirring shaft.

6. The road construction concrete mixer according to claim 5, characterized in that: A second strip groove is provided on the second base and at the rear side of the second cutting plate.

7. The road construction concrete mixer according to claim 6, characterized in that: At least three third stirring blades are arranged around the inner surface of the stirring upper cylinder, and each of the third stirring blades is distributed along the axial direction of the stirring upper cylinder.

8. The road construction concrete mixer according to any one of claims 1 to 7, characterized in that: The sealing assembly includes a convex ring convexly arranged on the lower end of the stirring upper cylinder, a first sealing groove concavely arranged on the outer surface of the convex ring, a sealing ring embedded in the first sealing groove, a support ring fixed on the outer surface of the stirring upper cylinder, a bearing, a sealing ring and a locking bolt. A threaded hole is provided on the upper part of the stirring lower cylinder, and the locking bolt passes through the threaded hole to fix the sealing ring. A second sealing groove is concavely arranged on the inner surface of the sealing ring. The convex ring and the sealing ring are embedded in the second sealing groove. The stirring upper cylinder, the stirring lower cylinder, the sealing ring and the support ring form an installation groove. The bearing is arranged in the installation groove. The sealing ring includes a sealing ring body. An annular groove is opened on the sealing ring body. A metal ring is embedded in the annular groove. The sealing ring body is pressed against the surface of the second sealing groove through the metal ring.

9. The road construction concrete mixer according to claim 8, characterized in that: The unloading mechanism includes a third driving motor, a unloading shell, a unloading shaft, unloading blades and a unloading nozzle. The unloading shell is provided with a feed end and a discharge end. The feed end of the unloading shell is connected with the discharge port. The unloading shaft is rotatably arranged in the unloading shell. The third driving motor is connected with the unloading shaft. The unloading blades are arranged on the unloading shaft and distributed in the unloading shell. The unloading blades are in a spiral structure. The unloading nozzle is arranged at the discharge end of the unloading shell.

10. The road construction concrete mixer according to claim 9, characterized in that: The guide assembly comprises a supporting wheel arranged on the bracket and an annular guide rail arranged on the outer surface of the stirring upper cylinder. The annular guide rail is provided with a guide groove, and the supporting wheel is embedded in the guide groove.

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