Concrete stirring device

Abstract

The invention relates to the technical field of concrete production equipment, in particular to a concrete stirring device which comprises a tank body, supports arranged on the two sides of the tank body, a stirring structure rotationally connected into the tank body and a first driving structure arranged at the bottom of the tank body and used for driving the stirring structure, and is characterized in that the stirring structure comprises a rotating shaft and a transmission table; an adjusting mechanism used for adjusting the position of the sliding plate is arranged in the transmission table, adjusting grooves allowing the adjusting mechanism to be exposed are formed between the tank body and the transmission table in the circumferential direction at equal intervals, and a second driving structure used for driving the fixed rotating shafts and the movable rotating shafts to rotate in the opposite directions is further arranged in the transmission table; and the rotating direction of the fixed rotating shaft is the same as that of the transmission table, so that the problem that viscous and caked concrete sediments cannot be actively separated by stirring blades mounted in a traditional tank body is solved.

Description

Technical Field

[0001] The present application relates to the technical field of concrete production equipment, and specifically discloses a concrete mixing device. Background Art

[0002] Concrete is widely used in industrial, agricultural, transportation, national defense, water conservancy and municipal construction projects, and with the gradual advancement of infrastructure construction, the demand for concrete is also increasing.

[0003] A concrete mixing plant is a device used to mix concrete.

[0004] A small concrete mixing device used in residential construction is mainly composed of a tank body, a bracket, a stirring blade installed in the tank body, and a driving structure installed at the bottom of the tank body. The driving structure drives the stirring blade to rotate in the tank body to mix and stir the concrete raw materials in the tank body, thereby producing concrete.

[0005] However, during the mixing production of concrete in the tank, the tank needs to be tilted to raise the tank mouth above the horizontal plane to prevent the concrete being mixed in the tank from overflowing from the tank mouth. However, the tilted tank will cause the heavier materials in the concrete to settle at the bottom of the tank, making the concrete at the bottom more viscous and easy to clump.

[0006] However, the mixing blades installed inside the existing tank body can only push the viscous and agglomerated concrete sediments during rotation, so that they are located at a high place and then fall into the concrete for mixing. They can only passively separate them into small clumps in the process of falling and hitting the concrete mixture, but cannot actively separate the viscous and agglomerated concrete sediments.

[0007] The present invention provides a concrete mixing device to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to solve the problem that the mixing blades installed inside the traditional tank body cannot actively separate the viscous and agglomerated concrete sediments.

[0009] In order to achieve the above-mentioned object, the basic scheme of the present invention provides a concrete mixing device, comprising a tank body, brackets arranged on both sides of the tank body, a mixing structure rotatably connected in the tank body, and a first driving structure arranged at the bottom of the tank body for driving the mixing structure, characterized in that the mixing structure comprises:

[0010] A rotating shaft, rotatably connected to the bottom of the tank body and driven by a first driving structure;

[0011] The transmission platform is coaxially fixed with the rotating shaft and fits on the bottom of the tank body;

[0012] A plurality of L-shaped scrapers are fixedly connected to the outer end surface of the transmission platform in a circumferentially inclined manner, including a right-angled side 1 and a right-angled side 2 which are perpendicular to each other, the direction of the right-angled side 1 is parallel to the radial direction of the transmission platform, the right-angled side 2 is arranged close to the axis of the transmission platform, and a plurality of correspondingly connected through grooves are equidistantly opened on the right-angled side 1 and the right-angled side 2;

[0013] A plurality of fixed rotating shafts are all rotatably connected to the transmission platform and are located on the inner side of one of the right-angle sides. A fixed rotating roller is fixedly connected to the fixed rotating shaft, and a plurality of fixed levers that can be extended into the through groove are fixedly connected to the fixed rotating roller circumferentially.

[0014] A plurality of movable rotating shafts, wherein the transmission platform is provided with a sliding groove parallel to the extending direction of the adjacent right-angled side 1 on the circumferential direction and is slidably and sealedly connected with a slide plate, the movable rotating shaft is rotatably connected to the slide plate and is located at the corner of the right-angled side 1 and the right-angled side 2, the movable rotating shaft is fixedly connected with a movable rotating roller, and a plurality of movable levers which can be extended into the through groove are fixedly connected with the movable rotating roller on the circumferential direction;

[0015] A second driving structure is provided in the transmission platform for driving the fixed rotating shaft and the movable rotating shaft to rotate towards each other, and the rotation direction of the fixed rotating shaft is the same as that of the transmission platform. An adjustment mechanism for adjusting the position of the slide is also provided in the transmission platform, and adjustment grooves for exposing the adjustment mechanism are circumferentially equidistantly provided between the tank body and the transmission platform.

[0016] Furthermore, the length of the fixed lever is equal to the length of the movable lever, and the length of the fixed lever and the movable lever is equal to the shortest distance between the fixed rotating roller and the movable rotating roller.

[0017] Furthermore, the width of the through groove on the first right-angled side is smaller than the width of the through groove on the second right-angled side.

[0018] Furthermore, a transmission chamber extending to the inner bottom surface of the tank body is formed in the transmission platform, and the fixed rotating shaft and the movable rotating shaft respectively pass through the transmission platform and the slide plate and extend into the transmission chamber. The second driving structure includes a fixed gear coaxially fixed to the fixed rotating shaft, a transmission shaft rotatably connected to the inner side of the transmission platform, a transmission gear coaxially fixed to the transmission shaft, a belt transmission mechanism meshed between the transmission shaft and the movable rotating shaft, and a double-sided rack and pinion coaxially fixed to the bottom surface of the tank body and meshed between the fixed gear and the transmission gear.

[0019] Furthermore, the transmission ratio between the fixed gear and the double-sided rack is not less than the transmission ratio between the transmission gear and the double-sided rack.

[0020] Furthermore, the adjustment mechanism includes a rotating tube fixedly connected to the inner side of the transmission platform and parallel to the sliding direction of the slide, a collar coaxially rotatably connected to the movable shaft, a connecting rod fixed to the collar, a rotating rod passing through the rotating tube and rotatably connected to the connecting rod at one end, the rotating tube is provided with an internal thread on the inner side, the outer wall of the rotating rod located on the inner side of the rotating tube is provided with an external thread meshing with the internal thread, and the free end of the rotating rod is provided with a cross groove.

[0021] Furthermore, a guide tube connected to the rotating tube is fixedly connected to the inner side of the transmission platform, and the free end of the guide tube passes through the side wall of the transmission platform and is formed with an adjustment hole that can be connected to the adjustment groove.

[0022] Furthermore, the belt transmission mechanism includes a driven pulley coaxially fixed on the moving rotating shaft, a transmission pulley coaxially fixedly installed on the transmission shaft, and a transmission belt meshed between the driven pulley and the transmission pulley.

[0023] The principle and effect of this scheme are:

[0024] 1. Compared with the prior art, the present invention controls the outer side of the right angle side to contact the raw materials to be mixed pre-loaded in the tank body through the installed movable roller and fixed roller, and adjusts the proximity of the movable roller and the fixed roller. In the process, the driving structure drives the rotating shaft to rotate and drives the transmission platform to rotate synchronously, and controls the outer side of the right angle side to contact the raw materials to be mixed pre-loaded in the tank body. Through the large area of ​​the right angle side-outer wall, the stirring and mixing effect is achieved, and the rotating fixed lever and movable lever can mix the raw materials and prepare uniform concrete.

[0025] 2. Compared with the prior art, the present invention stops the rotation of the output shaft of the driving motor after mixing the concrete, and adjusts the position of the rotating rod in the rotating tube by means of the guide tube entering into the adjusting groove, so that a gap is formed between the moving roller and the fixed roller for the agglomerated materials appearing after sedimentation to enter, and then reverses the output shaft of the driving motor and the transmission platform, so that the concrete first contacts the inner side surface of the right-angled side one, so that the agglomerated materials and sediments are driven into the gap by the fixed lever, and as the heights of the right-angled side one and the right-angled side two increase, the agglomerated materials and sediments will approach the moving roller and the moving lever from the gap, and be squeezed and separated by the moving roller and the moving lever in cooperation with the right-angled side one, thereby playing the role of actively separating the agglomerates, and the separated agglomerates can be discharged from the through grooves of the right-angled side one and the right-angled side two, thereby solving the problem that the mixing blades installed inside the traditional tank body cannot actively separate the viscous and agglomerated concrete sediments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of a concrete mixing device proposed in an embodiment of the present application is shown;

[0028] Figure 2 A schematic diagram showing a mixing structure of a concrete mixing device proposed in an embodiment of the present application is shown;

[0029] Figure 3 A schematic diagram showing a mixing structure of a concrete mixing device proposed in an embodiment of the present application is shown;

[0030] Figure 4 A schematic diagram of a mixing structure of a concrete mixing device proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0032] The figure marks in the drawings of the specification include: tank body 1, transmission platform 2, guide tube 3, fixed rotating shaft 4, fixed rotating roller 5, right angle side 1 6, tank body bottom surface 7, right angle side 2 8, movable rotating shaft 9, movable rotating roller 10, double-sided rack 11, rotating rod 12, transmission gear 13, fixed gear 14, rotating shaft 15, guide tube 16, slide plate 17, slide trough 18.

[0033] A concrete mixing device, for example Figure 1 and Figure 2 As shown:

[0034] It comprises a tank body 1, brackets installed on both sides of the tank body 1, a stirring structure installed in the tank body 1 and a first driving structure installed at the bottom of the tank body 1.

[0035] Specifically, the front opening of the tank body 1 is bent inward and has an inclined surface, which further prevents the concrete being mixed inside the tank body 1 from overflowing and facilitates the pouring of the mixed concrete. The bracket includes two supporting legs, the top ends of which are installed on both sides of the tank body 1 through bearings, and the tank body 1 rotates relative to the supporting legs. On the outside, a supporting steel frame is also installed to support the tank body 1 at a certain angle.

[0036] like Figure 3 and Figure 4 As shown, the stirring structure includes: a rotating shaft 15, a transmission platform 2, three L-shaped scrapers, three fixed rotating shafts 4 and three movable rotating shafts 9.

[0037] Specifically, the rotating shaft 15 is coaxially rotatably mounted at the bottom of the tank body 1, and the rotating shaft 15 passes through the tank body 1. The first driving structure includes a driving motor mounted at the bottom of the tank body 1, a driving wheel coaxially fixedly mounted on the output shaft of the driving motor, a driven wheel coaxially fixedly mounted on the rotating shaft 15, and a belt meshed between the driving wheel and the driven wheel.

[0038] The transmission platform 2 is installed at the bottom of the tank body 1, and a transmission chamber extending to the bottom surface 7 of the tank body is formed inside the transmission platform 2, and the end of the rotating shaft 15 extending into the tank body 1 is coaxially fixed inside the transmission platform 2. The outer wall of the transmission platform 2 fits the inner wall of the tank body 1, and in this embodiment, a sealing ring groove is circumferentially opened on the inner wall of the tank body 1, and a sealing ring platform is extended outward from the outer edge of the outer wall of the transmission platform 2 to engage with the sealing ring groove to prevent concrete slurry from entering the transmission chamber.

[0039] In this embodiment, three L-shaped scrapers are fixedly installed on the outer end surface of the transmission platform 2 in the circumferential direction, and the L-shaped scrapers are all fixedly installed on the outer end surface of the transmission platform 2 in a clockwise tilted direction. Specifically, the L-shaped scraper includes two parts, including a right-angled side 1 6 and a right-angled side 2 8 that are perpendicular to each other. The installation direction of the right-angled side 1 6 is parallel to the radial direction of the transmission platform 2, the right-angled side 2 8 is installed close to the axis of the transmission platform 2, and the outer end of the right-angled side 1 6 is in contact with the inner wall of the tank body 1. A number of correspondingly connected through grooves are also equidistantly opened on the right-angled side 1 6 and the right-angled side 2 8.

[0040] In this embodiment, three fixed rotating shafts 4 are installed, and the three fixed rotating shafts 4 are all rotatably installed on the transmission platform 2, and the inner end of the fixed rotating shaft 4 passes through the transmission platform 2 and extends into the transmission chamber, and the outer end of the fixed rotating shaft 4 is flush with the outer end surface of the L-shaped scraper. Specifically, the fixed rotating shaft 4 is installed on the inner side of the right angle side 6 and close to the inner wall of the tank body 1. A fixed rotating roller 5 is coaxially fixedly installed on the fixed rotating shaft 4. A plurality of fixed levers that can be extended into the through groove are circumferentially welded on the fixed rotating roller 5. The length of the fixed rotating roller 5 is the same as the length of the L-shaped scraper.

[0041] In this embodiment, three movable shafts 9 are installed. Three slide grooves 18 are opened circumferentially on the transmission platform 2. The opening direction of the slide grooves 18 is parallel to the extending direction of the adjacent right-angle side 6. A slide plate 17 is installed in the slide grooves 18. The two inner sides of the slide grooves 18 are opened with limiting inner grooves for the slide plate 17 to be placed. The inner end surface of the slide plate 17 is formed with a sealing part that fits the inner wall of the transmission platform 2 and covers the slide groove 18.

[0042] The movable rotating shaft 9 is installed through the slide plate 17 and can rotate on the slide plate 17, and the movable rotating shaft 9 passes through the slide plate 17. The slide plate 17 and the movable rotating shaft 9 are installed at the corners of the right angle side 1 6 and the right angle side 2 8 of the corresponding L-shaped scraper, and the movable rotating shaft 9 is also coaxially fixedly installed with a movable rotating roller 10, and a plurality of movable levers that can be extended into the through groove are fixedly welded circumferentially on the movable rotating roller 10, and the length of the movable rotating roller 10 is the same as the length of the L-shaped scraper.

[0043] Furthermore, the length of the fixed lever is equal to the length of the movable lever, and the length of the fixed lever and the movable lever is equal to the shortest distance between the fixed rotating roller 5 and the movable rotating roller 10. This prevents motion interference between the fixed lever and the movable lever. Furthermore, the fixed lever and the movable lever are arranged in an alternating manner.

[0044] Furthermore, the width of the through slot on the right angle side 1 6 is smaller than the width of the through slot on the right angle side 2 8. When the movable rotating shaft 9, the movable rotating roller 10, and the movable lever are moved close to the right angle side 2 8 to perform the active separation function of the concrete agglomerates, the separated materials can be discharged easily.

[0045] like Figure 3 and Figure 4 As shown, a second driving structure for driving the fixed rotating shaft 4 and the movable rotating shaft 9 to rotate towards each other is installed in the transmission platform 2.

[0046] Specifically, the second driving structure includes a fixed gear 14 coaxially fixedly mounted on the fixed rotating shaft 4 extending into the transmission chamber, a transmission shaft installed inside the transmission platform 2 and rotatable, a transmission gear 13 coaxially fixedly mounted on the transmission shaft, a belt transmission mechanism meshed between the transmission shaft and the rotating shaft 9 extending into the transmission chamber, and a double-sided rack and bar 11 coaxially fixedly mounted on the bottom surface 7 of the tank body, the double-sided rack and bar 11 meshes between the fixed gear 14 and the transmission gear 13, and the fixed gear 14 meshes on the teeth on the outside of the double-sided rack and bar 11, and the transmission rod gear meshes on the teeth on the inside of the double-sided rack and bar 11. When the rotating shaft 15 drives the transmission platform 2 to rotate, the fixed gear 14 and the transmission platform 2 rotate in the same direction.

[0047] Furthermore, the transmission ratio between the fixed gear 14 and the double-sided rack 11 is equal to the transmission ratio between the transmission gear 13 and the double-sided rack 11 .

[0048] An adjusting mechanism for adjusting the position of the slide plate 17 is also installed in the transmission platform 2 .

[0049] Specifically, the adjustment mechanism includes a rotating tube fixedly mounted on the inner side of the transmission platform 2 and parallel to the sliding direction of the slide plate 17, a collar coaxially mounted on the moving rotating shaft 9 and relatively rotatable with the moving rotating shaft 9, a connecting rod fixedly mounted on both sides of the collar, and a rotating rod 12 passing through the rotating tube, a rotating hole coaxially with the rotating tube is provided on the connecting rod for the rotating rod 12 to pass through, and a limiting ring groove is provided inside the rotating hole, and a limiting ring platform is formed on the outer wall of a section of the rotating rod 12 located inside the rotating hole and installed in the limiting ring groove. An internal thread is provided on the inner side of the rotating tube, and an external thread meshing with the internal thread is also provided on the outer wall of the rotating rod 12 located inside the rotating tube, and a cross groove is provided at the end of the rotating rod 12 passing through the rotating tube close to the inner wall of the tank body 1.

[0050] In this embodiment, three fan-shaped adjustment grooves are equidistantly opened on the inner wall of the tank body 1 .

[0051] Furthermore, three guide tubes 163 are fixedly installed on the inner side of the transmission platform 2, and the outer ends of the guide tubes 163 pass through the outer wall of the transmission platform 2 and are formed with adjustment holes that can be connected with the adjustment grooves as they rotate. When the adjustment holes slide into the adjustment grooves, a tool with a cross head can be inserted into the guide tube 163, and the lever can be rotated through the meshing relationship between the cross head and the cross groove, and then the position of the rotating rod 12 can be adjusted through the threaded meshing relationship, and the moving shaft 9 and the slide plate 17 can be driven to move synchronously through the connecting rod and the collar, so as to adjust the distance between the moving roller 10 and the moving lever and the right angle side 8.

[0052] Furthermore, the belt transmission mechanism includes a drive pulley coaxially fixedly mounted on the driving shaft 9, a drive pulley coaxially fixedly mounted on the transmission shaft, and a drive belt meshed between the driven pulley and the drive pulley.

[0053] When the present invention is used, the tank body 1 is rotated to a certain inclination angle and supported by a supporting steel frame, the raw materials to be mixed are placed in the tank body 1, the guide tube 163 is rotated into the adjustment groove, and the movable shaft 9 is moved close to the fixed shaft 4 by rotating the lever, and then the driving motor is started;

[0054] First, the output shaft of the driving motor rotates, driving the transmission platform 2 to rotate clockwise. At this time, the right-angled side 6 plays a major stirring role, pushing the raw materials in the tank body 1 to mix. In addition, during the rotation of the transmission rod platform, the transmission gear 13 and the fixed gear 14 are respectively meshed on the inner and outer sides of the double-sided rack 11. The transmission gear 13 drives the dynamic shaft 9 to rotate through the belt transmission mechanism. The rotation of the fixed gear 14 directly drives the fixed shaft 4 to rotate, and the fixed shaft 4 rotates clockwise, and the dynamic shaft 9 rotates counterclockwise. In the process of clockwise rotation of the right-angled side 6, the raw materials on the outside of the right-angled side 6 can be brought into the inside of the right-angled side 6 through the fixed lever and the movable lever through the through slot, and stirred inwardly by the staggered fixed lever and the movable lever, which can play the role of mixing the raw materials and preparing uniform concrete, and the large area of ​​the outer wall of the right-angled side 6 can play a better and faster stirring and mixing role, and when the right-angled side 6 moves to the upper part of the tank body 1, the raw materials that have not been stirred can be sprinkled downwards to disperse the raw materials and prevent the raw materials from agglomerating;

[0055] After the concrete is evenly mixed, before pouring out the concrete, it is necessary to continue stirring the concrete to prevent it from settling and condensing. At this time, the speed of the output shaft of the driving motor is slowed down until it stops rotating, and the guide tube 163 is located in the adjustment groove;

[0056] After that, the rotating rod 12 is rotated through the guide tube 163 to control the movable rotating shaft 9 to move away from the fixed rotating shaft 4, so that the movable lever on the movable rotating shaft 9 extends into the through groove of the second right-angle side 8, and a gap is formed between the movable rotating roller 10 and the fixed rotating roller 5 for the agglomerated materials to enter. After the adjustment is completed, the driving motor is started, and the output shaft of the driving motor is reversed to drive the transmission platform 2 to rotate counterclockwise;

[0057] During the counterclockwise rotation of the transmission platform 2, the fixed rotating shaft 4 rotates in the same direction as the transmission platform 2, while the dynamic rotating shaft 9 rotates clockwise. At this time, the inner end face of the right-angled side 1 6 first contacts the concrete. When agglomerates appear in the concrete due to sedimentation, the agglomerated materials will first be brought into the gap by the counterclockwise rotating fixed rotating roller 5 and the fixed lever. By forming a gap, it can be ensured that when the right-angled side 1 6 moves to a higher position, the agglomerated materials will not directly fall from the dynamic rotating roller 10 and the fixed rotating roller 5, and as the height of the right-angled side 1 6 and the right-angled side 2 8 increases, they will approach the dynamic rotating roller 10 and the dynamic lever from the gap, and be squeezed and separated by the dynamic rotating roller 10 and the dynamic lever in cooperation with the right-angled side 1 6, thereby actively separating the agglomerates, and the separated agglomerates can be discharged from the through grooves of the right-angled side 1 6 and the right-angled side 2 8;

[0058] At the same time, the fixed rotating roller 5, the fixed lever and the right angle edge 6 can also play an auxiliary separation effect;

[0059] At the same time, through the controllable gap size, it can be applied to the mixing of concrete with different degrees of coagulation.

[0060] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A concrete mixing device, comprising a tank body, brackets arranged on both sides of the tank body, a mixing structure rotatably connected in the tank body, and a first driving structure arranged at the bottom of the tank body for driving the mixing structure, characterized in that: The stirring structure comprises: A rotating shaft, rotatably connected to the bottom of the tank body and driven by a first driving structure; The transmission platform is coaxially fixed with the rotating shaft and fits on the bottom of the tank body; A plurality of L-shaped scrapers are fixedly connected to the outer end surface of the transmission platform in a circumferentially inclined manner, including a right-angled side 1 and a right-angled side 2 which are perpendicular to each other, the direction of the right-angled side 1 is parallel to the radial direction of the transmission platform, the right-angled side 2 is arranged close to the axis of the transmission platform, and a plurality of correspondingly connected through grooves are equidistantly opened on the right-angled side 1 and the right-angled side 2; A plurality of fixed rotating shafts are all rotatably connected to the transmission platform and are located on the inner side of one of the right-angle sides. A fixed rotating roller is fixedly connected to the fixed rotating shaft, and a plurality of fixed levers that can be extended into the through groove are fixedly connected to the fixed rotating roller circumferentially. A plurality of movable rotating shafts, wherein the transmission platform is provided with a sliding groove parallel to the extending direction of the adjacent right-angled side 1 on the circumferential direction and is slidably and sealedly connected with a slide plate, the movable rotating shaft is rotatably connected to the slide plate and is located at the corner of the right-angled side 1 and the right-angled side 2, the movable rotating shaft is fixedly connected with a movable rotating roller, and a plurality of movable levers which can be extended into the through groove are fixedly connected with the movable rotating roller on the circumferential direction; A second driving structure is provided in the transmission platform for driving the fixed rotating shaft and the movable rotating shaft to rotate towards each other, and the rotation direction of the fixed rotating shaft is the same as that of the transmission platform. An adjustment mechanism for adjusting the position of the slide is also provided in the transmission platform, and adjustment grooves for exposing the adjustment mechanism are circumferentially equidistantly provided between the tank body and the transmission platform.

2. A concrete mixing device according to claim 1, characterized in that: The length of the fixed lever is equal to the length of the movable lever, and the length of the fixed lever and the movable lever is equal to the shortest distance between the fixed rotating roller and the movable rotating roller.

3. A concrete mixing device according to claim 1, characterized in that: The width of the through groove on the first right-angled side is smaller than the width of the through groove on the second right-angled side.

4. A concrete mixing device according to claim 1, characterized in that: The transmission platform is formed with a transmission chamber extending to the bottom surface of the tank body, and the fixed rotating shaft and the movable rotating shaft respectively pass through the transmission platform and the slide plate and extend into the transmission chamber. The second driving structure includes a fixed gear coaxially fixed to the fixed rotating shaft, a transmission shaft rotatably connected to the inner side of the transmission platform, a transmission gear coaxially fixed to the transmission shaft, a belt transmission mechanism meshed between the transmission shaft and the movable rotating shaft, and a double-sided rack and pinion coaxially fixed to the bottom surface of the tank body and meshed between the fixed gear and the transmission gear.

5. A concrete mixing device according to claim 4, characterized in that: The transmission ratio between the fixed gear and the double-sided rack is not less than the transmission ratio between the transmission gear and the double-sided rack.

6. A concrete mixing device according to claim 4, characterized in that: The adjustment mechanism includes a rotating tube fixedly connected to the inner side of the transmission platform and parallel to the sliding direction of the slide plate, a collar coaxially rotatably connected to the movable rotating shaft, a connecting rod fixed to the collar, and a rotating rod passing through the rotating tube and rotatably connected to the connecting rod at one end. The rotating tube is provided with an internal thread on the inner side, and the outer wall of the rotating rod located on the inner side of the rotating tube is provided with an external thread meshing with the internal thread, and the free end of the rotating rod is provided with a cross groove.

7. A concrete mixing device according to claim 6, characterized in that: A guide tube connected to the rotating tube is also fixedly connected to the inner side of the transmission platform. The free end of the guide tube passes through the side wall of the transmission platform and is formed with an adjustment hole that can be connected to the adjustment groove.

8. A concrete mixing device according to claim 6, characterized in that: The belt transmission mechanism comprises a driven pulley coaxially fixed on the moving rotating shaft, a transmission pulley coaxially fixedly installed on the transmission shaft, and a transmission belt meshed between the driven pulley and the transmission pulley.

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