Concrete mixer

Abstract

The invention provides a concrete mixer which comprises a rack and a mixing bin, a feeding port is formed in the top of the mixing bin, a discharging port is formed in the side face of the mixing bin, an outer mixing shaft is arranged in the mixing bin, a first motor is arranged on the mixing bin, a plurality of guide cylinders are arranged on the outer mixing shaft, and the axial direction of the guide cylinders is consistent with the radial direction of the outer mixing shaft; movable moving parts are arranged in the guide cylinders in a sleeved mode respectively, stirring rods are fixedly connected to the moving parts respectively, stirring blades are arranged at one ends of the stirring rods, a rotatable inner stirring shaft is arranged in the outer stirring shaft, a second motor in transmission connection with the inner stirring shaft is arranged on the outer stirring shaft, and a plurality of eccentric wheels are arranged on the inner stirring shaft at intervals. The eccentric wheels are rotationally connected with transmission pieces correspondingly, and the transmission pieces are rotationally connected with the movable pieces in a one-to-one correspondence mode. The technical problem that the concrete mixing efficiency is low due to the fact that concrete rotates in the same direction for a long time is solved, and the technical effects that the concrete mixing efficiency is improved, and the time needed for uniformly mixing the concrete is shortened are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete production, and particularly relates to a concrete mixer. BACKGROUND

[0002] Concrete is a kind of artificial stone made of cementitious materials, aggregates, water, and, if necessary, added admixtures and admixtures in a certain proportion, uniformly mixed, compacted, and cured to harden. A concrete mixer is a machine that mixes and stirs the above-mentioned raw materials into a concrete mixture.

[0003] A concrete mixer disclosed in the utility model with publication number CN218557527U includes a base part and a stirring part. The base part includes a base in the shape of a cuboid, a support rod and a hollow cylindrical groove arranged on the upper surface of the base. The stirring part includes a stirring container cavity in the shape of a hollow cylinder, a stirring roller and a motor. The bottom of the stirring container cavity is provided with a stand column at a position corresponding to the hollow cylindrical groove. The bottom of the stirring container cavity is connected through a hinged structure at a position corresponding to the support rod. The right wall of the stirring container cavity is provided with a bearing, and the left wall is provided with an opening. The rotating shaft of the stirring roller passes through the opening and enters the stirring container cavity and abuts against the bearing. The end of the stirring roller away from the bearing is drivingly connected to the motor. The outer peripheral surface of the rotating shaft of the stirring roller is uniformly provided with a plurality of stirring blades. An opening is provided through the lower right wall of the stirring container cavity and is provided with a sealing cover. The top of the stirring container cavity is connected with a hopper. The concrete mixer tilts and rotates around the hinged structure as the rotating point. The concrete in the concrete mixer is directly poured out from the inside of the concrete mixer under the action of gravity, ensuring the balance and stability of the concrete mixer during pouring, thereby improving the operation safety of the concrete mixer.

[0004] The concrete mixer disclosed in the above-mentioned utility model mixes and stirs the concrete through the stirring blades arranged on the outer peripheral surface of the rotating shaft of the stirring roller. Since the position of the stirring blades relative to the rotating shaft is fixed and the concrete is sticky, the concrete is easily rotated along the same direction for a long time with the stirring blades, resulting in a long time required for complete mixing of the concrete and low mixing efficiency of the concrete. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a concrete mixer, which solves the problem of low mixing efficiency of concrete caused by long-time rotation of concrete in the same direction in the prior art.

[0006] According to the embodiment of the present application, a concrete mixer comprises a frame and a mixing bin arranged on the frame, the top of the mixing bin is provided with a feeding port and the side of the mixing bin is provided with a discharging port, a rotatable outer stirring shaft is arranged in the mixing bin and a first motor in transmission connection with the outer stirring shaft is arranged on the mixing bin, a plurality of guide cylinders are arranged on the outer stirring shaft in the axial direction of the outer stirring shaft, the axial direction of the guide cylinders is consistent with the radial direction of the outer stirring shaft, movable moving parts are respectively sleeved in the guide cylinders, stirring rods are respectively fixedly connected to the moving parts and stirring blades are arranged at one end of the stirring rods, a rotatable inner stirring shaft is arranged in the outer stirring shaft and a second motor in transmission connection with the inner stirring shaft is arranged on the outer stirring shaft, a plurality of eccentric wheels are arranged on the inner stirring shaft in intervals, transmission parts are respectively rotatably connected to the eccentric wheels and the transmission parts are rotatably connected to the moving parts one by one.

[0007] Compared with the prior art, the present application has the following beneficial effects: the first motor is used to drive the outer stirring shaft to rotate to drive the stirring blades to rotate in the mixing bin to mix the raw materials in the mixing bin, the second motor is used to drive the inner stirring shaft to rotate in the outer stirring shaft while the outer stirring shaft rotates, the moving parts are driven by the transmission parts to move in the guide cylinders along the radial direction of the outer stirring shaft with the rotation of the eccentric wheels, and then the stirring blades are driven to move in the radial direction of the outer stirring shaft while rotating in the axial direction of the outer stirring shaft and agitate the raw materials in the mixing bin, so that the mixing speed of the raw materials is accelerated, the problem of low concrete mixing efficiency caused by long-time rotation of the concrete in the same direction is solved, and the technical effects of improving the concrete mixing efficiency and shortening the time required for uniform mixing of the concrete are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a structural schematic view of the concrete mixer of an embodiment of the present application; Figure 2 It is a sectional view of the concrete mixer of an embodiment of the present application; Figure 3 It is a partial structural schematic view of the concrete mixer of an embodiment of the present application; Figure 4 It is another partial structural schematic view of the concrete mixer of an embodiment of the present application; Figure 5 It is a sectional view of another section of the concrete mixer of an embodiment of the present application.

[0009] In the above drawings: 1, frame; 2, stirring bin; 21, feeding port; 22, discharging port; 23, first motor; 24, guide plate; 25, adjusting plate; 3, outer stirring shaft; 31, guide cylinder; 32, second motor; 33, first connecting shaft; 34, second connecting shaft; 4, movable part; 41, stirring rod; 42, stirring blade; 43, reinforcing rod; 5, inner stirring shaft; 51, eccentric wheel; 52, groove; 6, transmission part; 61, first half ring body; 62, second half ring body; 63, connecting rod; 7, crushing bin; 71, crushing roller; 72, gear; 73, chain; 8, feeding hopper; 81, partition plate; 9, material blocking plate; 91, screw rod; 92, threaded sleeve; 93, hand wheel. DETAILED DESCRIPTION

[0010] The technical solutions in the present application will be further described below in combination with the drawings and examples.

[0011] As Figures 1 to 5 shown in the drawings, the present application provides a concrete mixer for stirring and mixing raw materials such as cementing material, aggregate and water into concrete mixture.

[0012] Please refer to Figure 1 , Figure 2 and Figure 3The utility model relates to a concrete mixer, which comprises a frame 1 and a mixing bin 2 arranged on the frame 1, the top of the mixing bin 2 is provided with a feeding port 21, the side of the mixing bin 2 is provided with a discharging port 22, and the mixing bin 2 is used for accommodating raw materials of concrete; a rotatable outer stirring shaft 3 is arranged in the mixing bin 2, and a first motor 23 in transmission connection with the outer stirring shaft 3 is arranged on the mixing bin 2; a plurality of guide cylinders 31 are arranged on the outer stirring shaft 3 at intervals along the axial direction of the outer stirring shaft 3, the axial direction of the guide cylinders 31 is consistent with the radial direction of the outer stirring shaft 3, and a movable movable part 4 is sleeved in each guide cylinder 31; a stirring rod 41 is fixedly connected to the movable part 4, and a stirring blade 42 is arranged at one end of the stirring rod 41; when the outer stirring shaft 3 rotates under the drive of the first motor 23, the stirring blade 42 rotates around the axial direction of the outer stirring shaft 3 and stirs the raw materials in the mixing bin 2; a rotatable inner stirring shaft 5 is arranged in the outer stirring shaft 3, and a second motor 32 in transmission connection with the inner stirring shaft 5 is arranged on the outer stirring shaft 3; a plurality of eccentric wheels 51 are arranged on the inner stirring shaft 5 at intervals, a transmission part 6 is rotatably connected to each eccentric wheel 51, and the transmission part 6 is rotatably connected to the movable part 4 in one-to-one correspondence; when the inner stirring shaft 5 rotates under the drive of the second motor 32, the eccentric wheel 51 drives the movable part 4 to reciprocally move in the radial direction of the outer stirring shaft 3 in the guide cylinder 31 through the transmission part 6, so that the stirring rod 41 fixedly connected to the movable part 4 and the stirring blade 42 arranged on the stirring rod 41 reciprocally move in the radial direction of the outer stirring shaft 3, so as to stir the raw materials in the mixing bin 2 through the action of the stirring blade 42 and prevent the raw materials from rotating in the same direction for a long time during the mixing process.

[0013] Specifically, the process of mixing concrete by the concrete mixer provided in the embodiment is as follows: raw materials such as cementitious materials, aggregates, water, admixtures and the like are poured into the mixing bin 2 from the feeding port 21 in proportion, the first motor 23 and the second motor 32 are started respectively, the first motor 23 drives the outer stirring shaft 3 to rotate to drive the stirring blades 42 to rotate in the mixing bin 2 to mix the raw materials in the mixing bin 2, at the same time, the second motor 32 drives the inner stirring shaft 5 to rotate in the outer stirring shaft 3, with the rotation of the inner stirring shaft 5, the eccentric wheel 51 drives the movable part 4 to reciprocate along the radial direction of the outer stirring shaft 3 in the guide cylinder 31 through the transmission part 6, so that the stirring blades 42 rotate around the axial direction of the outer stirring shaft 3 and reciprocate along the radial direction of the outer stirring shaft 3 to stir the raw materials in the mixing bin 2, which prevents the raw materials from rotating in a single direction for a long time, thereby accelerating the mixing speed of the raw materials, and after the raw materials are mixed uniformly, the concrete mixture is discharged from the discharge port 22 of the mixing bin 2. The concrete mixer provided in the embodiment drives the stirring blades 42 to rotate around the axial direction of the outer stirring shaft 3 and reciprocate along the radial direction of the outer stirring shaft 3 in the mixing bin 2, which avoids the concrete from rotating in a single direction for a long time during the mixing process, is conducive to improving the concrete mixing efficiency and shortening the time required for the concrete to be mixed uniformly, thereby improving the concrete production efficiency.

[0014] As shown in Figure 2 and Figure 3 , the two ends of the outer stirring shaft 3 are respectively connected with the first connecting shaft 33 and the second connecting shaft 34 through flanges, the first connecting shaft 33 is rotationally connected with the mixing bin 2 and matched with the output end of the first motor 23, the second connecting shaft 34 is rotationally connected with the mixing bin 2 and is provided with a mounting hole matched with the inner stirring shaft 5, and the second motor 32 is fixedly arranged on the second connecting shaft 34. The first connecting shaft 33 and the second connecting shaft 34 are respectively fixedly connected with the mixing bin 2 through flanges, the first connecting shaft 33 and the second connecting shaft 34 are respectively rotationally connected with the mixing bin 2 to make the cooperation between the outer stirring shaft 3 and the mixing bin 2 firm and enable the outer stirring shaft 3 to rotate smoothly in the mixing bin 2, the first connecting shaft 33 is matched with the output end of the first motor 23 to enable the power output by the first motor 23 to be smoothly transmitted to the outer stirring shaft 3 and drive the outer stirring shaft 3 to rotate, the inner stirring shaft 5 is mounted into the outer stirring shaft 3 through the cooperation with the mounting hole, and the second motor 32 is fixed on the second connecting shaft 34 through a flange, thereby ensuring the stable operation of the concrete mixer.

[0015] As shown in Figure 4As shown, the eccentric wheel 51 is provided with a groove 52 on the outer peripheral wall, the transmission member 6 comprises a first half ring body 61 and a second half ring body 62 fixedly connected, and the first half ring body 61 and the second half ring body 62 enclose an annular ring matched with the groove 52. The transmission member 6 is matched with the eccentric wheel 51 through the annular ring encircling the eccentric wheel 51 formed by the first half ring body 61 and the second half ring body 62, and the first half ring body 61 and the second half ring body 62 are fixedly connected by bolts after abutting, so that the connection of the first half ring body 61 and the second half ring body 62 is firm, and the rotation connection between the transmission member 6 and the eccentric wheel 51 is reliable.

[0016] In the embodiment, the transmission member 6 further comprises a connecting rod 63 threadedly connected with the first half ring body 61, and one end of the connecting rod 63 away from the first half ring body 61 is rotationally connected with the movable member 4. The transmission member 6 threadedly connected with the first half ring body 61 is used to realize the rotation connection between the transmission member 6 and the movable member 4, and the connecting rod 63 is installed on the first half ring body 61 after being matched with the movable member 4, so that the concrete mixer is conveniently assembled.

[0017] Please refer to Figure 4 and Figure 5 , the stirring blade 42 is in a spiral shape, and the stirring rod 41 is further provided with a reinforcing rod 43, and two ends of the reinforcing rod 43 are fixedly connected with the stirring blade 42. The stirring blade 42 is arranged in a spiral shape, which is beneficial to improve the stirring effect of the stirring blade 42, and the reinforcing rod 43 is arranged on the stirring rod 41 and connected with the stirring blade 42, which improves the structural strength of the stirring blade 42 and prevents the stirring blade 42 from being damaged due to collision with raw materials during stirring.

[0018] Please refer to Figure 1 , Figure 2 and Figure 5The stirring bin 2 is further provided with a crushing bin 7 in communication with the feeding port 21, two rotatable crushing rollers 71 are arranged in the crushing bin 7 in intervals and the two crushing rollers 71 are drivingly connected through a gear 72, and the first motor 23 is drivingly connected with one of the crushing rollers 71 through a chain 73. Before the raw materials enter the feeding port 21, the raw materials enter the crushing bin 7 first, the power output by the first motor 23 is transmitted to one of the crushing rollers 71 through the chain 73, and the synchronous rotation of the two crushing rollers 71 is realized through the meshing of the gear 72. When the two crushing rollers 71 rotate, the raw materials in the crushing bin 7 are crushed by extrusion, so as to prevent the raw materials with too large particle size from directly entering the stirring bin 2 and colliding with the stirring blades 42, which can cause the damage of the stirring blades 42 or affect the mixing effect of the stirring blades 42, and the crushing of the raw materials before mixing is beneficial to improve the quality of the concrete.

[0019] Please refer to Figure 5 The crushing bin 7 is further provided with a feeding hopper 8 in communication with the crushing bin 7, and a partition plate 81 is arranged in the feeding hopper 8 and located above the crushing rollers 71. The feeding hopper 8 installed on the crushing bin 7 is used to guide the raw materials into the crushing bin 7, prevent the raw materials from falling out of the crushing bin 7 when the raw materials are added into the crushing bin 7, and block the splashed debris and dust in the crushing process through the partition plate 81 arranged in the feeding hopper 8, so as to avoid the debris and dust generated in the crushing process from entering the external environment through the opening of the feeding hopper 8 and causing pollution.

[0020] In detail, the cross section of the partition plate 81 is inverted V-shaped. The inverted V-shaped partition plate 81 is arranged to guide the raw materials poured into the feeding hopper 8 to move to the crushing bin 7, so as to prevent the raw materials from remaining in the feeding bin and causing the blockage of the feeding bin.

[0021] As shown in Figure 1 and Figure 2 The stirring bin 2 is further provided with a guide plate 24 in communication with the discharging port 22. The guide plate 24 is used to guide the concrete mixture mixed in the stirring bin 2 to discharge out of the stirring bin 2, so as to facilitate the collection of the concrete mixture discharged out of the stirring bin 2.

[0022] Please refer to Figure 1 and Figure 2A baffle plate 9 is hinged to the mixing chamber 2, covering the discharge port 22. A screw 91 is hinged to the baffle plate 9, and a threaded sleeve 92 is provided on the screw 91 to cooperate with it. An adjusting plate 25 is hinged to the guide plate 24, and the adjusting plate 25 has a through hole for the screw 91 to pass through. The threaded sleeve 92 abuts against the side of the adjusting plate 25 away from the baffle plate 9. The baffle plate 9 is used to close the discharge port 22 to prevent leakage of raw materials from the discharge port 22 during the mixing process. After mixing is completed, the discharge port 22 can be opened by rotating the threaded sleeve 92 to move along the axial direction of the screw 91 and drive the baffle plate 9 to rotate, so as to take out the concrete mixture in the mixing chamber 2. When it is necessary to mix raw materials again, the threaded sleeve 92 can be rotated in the opposite direction to close the discharge port 22. The operation is simple.

[0023] In this embodiment, a handwheel 93 is fixedly connected to the threaded sleeve 92, and the handwheel 93 is located at the end of the threaded sleeve 92 away from the adjusting plate 25. The handwheel 93 fixed to the threaded sleeve 92 is used to operate the threaded sleeve 92 to rotate, so as to adjust the angle of the baffle plate 9 and close or open the feed port 21.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A concrete mixer, comprising a frame and a mixing chamber mounted on the frame, wherein the top of the mixing chamber is provided with a feed inlet and the side of the mixing chamber is provided with a discharge outlet, characterized in that: The mixing chamber is equipped with a rotatable outer mixing shaft, and the mixing chamber is equipped with a first motor that is drivenly connected to the outer mixing shaft. Multiple guide cylinders are spaced apart along the axial direction of the outer mixing shaft, and the axial direction of the guide cylinders is consistent with the radial direction of the outer mixing shaft. Movable movable parts are respectively sleeved inside the guide cylinders. A mixing rod is fixedly connected to each movable part, and a mixing blade is provided at one end of each mixing rod. The outer mixing shaft is equipped with a rotatable inner mixing shaft, and the outer mixing shaft is equipped with a second motor that is drivenly connected to the inner mixing shaft. Multiple eccentric wheels are spaced apart on the inner mixing shaft, and a transmission component is rotatably connected to each eccentric wheel, and the transmission component is rotatably connected to each movable part in a one-to-one correspondence.

2. The concrete mixer as described in claim 1, characterized in that: The outer stirring shaft is connected to a first connecting shaft and a second connecting shaft at both ends by flanges. The first connecting shaft is rotatably connected to the stirring chamber and cooperates with the output end of the first motor. The second connecting shaft is rotatably connected to the stirring chamber and has a mounting hole on it that cooperates with the inner stirring shaft. The second motor is fixedly mounted on the second connecting shaft.

3. A concrete mixer as described in claim 1, characterized in that: The outer peripheral wall of the eccentric wheel is provided with a groove, and the transmission component includes a first half-ring and a second half-ring that are fixedly connected. The first half-ring and the second half-ring form an annulus that cooperates with the groove.

4. A concrete mixer as described in claim 1, characterized in that: The stirring blades are spiral-shaped, and the stirring rod is also provided with a reinforcing rod, the two ends of which are fixedly connected to the stirring blades.

5. A concrete mixer as described in claim 1, characterized in that: The mixing chamber is also equipped with a crushing chamber that communicates with the feed inlet. Two rotatable crushing rollers are spaced apart in the crushing chamber and are connected by gear transmission. The first motor is connected to one of the crushing rollers by a chain.

6. A concrete mixer as described in claim 5, characterized in that: The crushing chamber is also provided with a feed hopper that communicates with the crushing chamber. The feed hopper is provided with a partition and the partition is located directly above the crushing roller.

7. A concrete mixer as described in claim 6, characterized in that: The cross-section of the partition is inverted V-shaped.

8. A concrete mixer as described in claim 1, characterized in that: The mixing chamber is also equipped with a guide plate, which is connected to the discharge port.

9. A concrete mixer as described in claim 8, characterized in that: A baffle plate is hinged to the mixing chamber, the baffle plate covers the discharge port, and a screw is hinged to the baffle plate. The screw is provided with a threaded sleeve that mates with the screw. An adjusting plate is hinged to the guide plate, and the adjusting plate is provided with a through hole for the screw to pass through. The threaded sleeve abuts against the side of the adjusting plate away from the baffle plate.

10. A concrete mixer as described in claim 9, characterized in that: A handwheel is fixedly connected to the threaded sleeve, and the handwheel is located at the end of the threaded sleeve away from the adjusting plate.

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