A vibrating mixer

Abstract

The present invention provides a vibration mixer, which relates to the technical field of material mixing equipment. The vibration mixer includes a drive motor, which is connected to a stirring shaft in a transmission manner. The vibration mixer also includes a stirring tank. A stirring assembly is installed on the stirring shaft in a circumferentially fixed and axially floating manner. The stirring assembly extends into the stirring tank. An excitation structure is fixedly provided on one axial side of the stirring assembly relative to the housing of the reduction mechanism. An elastic member is also provided on one axial side of the stirring assembly. One of the stirring assembly and the excitation structure has a circumferentially continuous concave and convex surface, and the other is provided with a top pressure structure. During the rotation of the stirring assembly, the top pressure of the elastic member causes the top pressure structure to press and fit with the concave and convex surface, ensuring that the form and amplitude of the vibration are consistent with the shape of the concave and convex surface. The stirring assembly vibrates up and down during rotation, and the vibration effect is more obvious. The adhering cement clusters can be effectively removed, thereby improving the uniformity of concrete mixing and ensuring the quality of concrete mixing.

Description

Technical Field

[0001] The invention relates to the technical field of material mixing equipment, in particular to a vibration mixer. Background Art

[0002] With the deepening development of my country's economy, construction projects are increasing. Modern infrastructure projects cannot do without the use of concrete. The quality of concrete largely determines the quality of the project. Concrete is mainly made by mixing sand, cement, and water. During the mixing process, segregation and cement lumps often occur. On the one hand, this requires increasing the amount of cement. On the other hand, due to the uneven mixing of concrete, the internal mechanical properties after setting are poor, which in turn affects the quality of the project.

[0003] Vibration mixing is a powerful means to improve the quality and efficiency of concrete mixing, because under the action of vibration, the internal particles of concrete continue to vibrate, destroying the cement particle clusters, making the cement fully hydrated, and facilitating the wrapping between the cement slurry and the aggregate, improving the micro-uniformity of the concrete and its strength. For example, the Chinese invention patent application with application publication number CN107672030A discloses a vertical vibrating mixer with a threaded vibrator, including a vibration power device, a stirring power device and a mixing drum, the stirring power device is connected to the stirring device, and the vibration power device drives the spiral vibrator to rotate at high speed in the center of the stirring device through a connecting shaft. During operation, the stirring device pushes the material close to the drum wall inward toward the spiral vibrator, which collides with the material wrapped around it, and because the displacement size is limited, a vibration effect is generated, thereby improving the mixing quality.

[0004] However, in actual use, cement clusters are easily adhered to the blades of the mixing device. In the above-mentioned prior art, the vibration is generated only from the center position, and there is no vibration effect at other positions of the mixing drum, especially around the blades. There is a problem that the vibration effect of the device is not obvious and the effect on improving the quality of concrete mixing is limited. Summary of the Invention

[0005] The object of the present invention is to provide a vibrating mixer to solve the problem in the prior art that the vibration effect is not obvious and the effect of improving the concrete mixing quality is limited.

[0006] To achieve the above object, the technical solution of the vibration mixer of the present invention is:

[0007] The vibrating mixer includes a driving motor, which is connected to a stirring shaft through a reduction mechanism. The vibrating mixer also includes a stirring tank. A stirring component is installed on the stirring shaft in a circumferentially fixed and axially floating manner. The stirring component extends into the stirring tank. An excitation structure is fixedly provided on one axial side of the stirring component relative to the casing of the reduction mechanism. An elastic member is also provided on one axial side of the stirring component to press the stirring component against the excitation structure. One of the stirring component and the excitation structure has a circumferentially continuous concave and convex surface, and the other is provided with a top pressure structure for cooperating with the concave and convex surface. When the stirring component rotates relative to the excitation structure, the stirring component vibrates up and down in the axial direction through the cooperation between the top pressure structure and the concave and convex surface.

[0008] Beneficial effects: the excitation structure is fixed relative to the casing of the reduction mechanism, the stirring assembly and the stirring shaft are circumferentially fixed and axially floatingly installed, and when the stirring shaft drives the stirring assembly to rotate, the circumferentially continuous concave and convex surfaces and the top pressure structure relatively arranged on the stirring assembly and the excitation structure cooperate with each other. During the rotation of the stirring assembly, up and down vibrations can be generated in the axial direction according to the changes in the concave and convex surfaces, and due to the elastic top pressure effect of the elastic part, the top pressure structure and the concave and convex surfaces are in top pressure contact, ensuring that the form and amplitude of the vibration are consistent with the shape of the concave and convex surfaces. Compared with the vibration form of the mixer in the prior art, the up and down vibration during rotation has a more obvious vibration effect, can effectively remove cement clusters adhering to the stirring assembly, improves the uniformity of concrete mixing, and ensures the quality of concrete mixing.

[0009] To simplify the structure, the vertical positions of the excitation structure and the stirring assembly can be further defined. The excitation structure is mounted on the output shaft above the stirring assembly. Correspondingly, the excitation structure can also be located below the stirring assembly, and the connection between the excitation structure and the reducer housing can be adjusted accordingly.

[0010] The elastic member can be a tension spring, and the upward pulling force of the tension spring causes the stirring component and the relative parts of the excitation structure to be pressed together. In order to facilitate assembly, the elastic member is further defined, and a stopping structure is provided at the lower end of the stirring shaft, and a compression spring is also provided between the stopping structure and the relative surface of the stirring member for pressing the stirring component upward against the lower end of the excitation structure. The compression spring constitutes the elastic member.

[0011] The concavo-convex surface may be located on the vibration structure, and the top pressure structure may be correspondingly arranged on the stirring component. Accordingly, the concavo-convex surface is located on the stirring component, and the top pressure structure may be relatively arranged on the vibration structure.

[0012] The concavo-convex undulating surface may be an annular serrated surface, and correspondingly, the concavo-convex undulating surface is an annular wavy surface.

[0013] In order to reduce the wear caused by the relative rotation of the stirring assembly and the exciting structure, a corresponding structure is added between the two. The pressing end of the pressing structure is provided with a roller that rolls with the concave and convex surface.

[0014] In order to facilitate processing and assembly, the stirring assembly is further defined as comprising a shaft sleeve sleeved on the output shaft and a stirring arm fixed on the shaft sleeve, wherein the upper end surface of the shaft sleeve constitutes the annular wavy surface.

[0015] In order to prevent concrete materials from entering the gap of the mixing assembly and avoid the problem of machine jamming, a corresponding structure is added on the basis of the above solution. The shaft sleeve is located between the excitation structure and the stop structure and is also provided with a circumferentially sealed elastic sealing sleeve.

[0016] In order to enable the mixing assembly to revolve in the mixing tank while rotating around the mixing shaft, thereby improving the mixing quality of the concrete, the transmission connection form is further limited. The reduction mechanism is a planetary reduction mechanism. The output shaft of the drive motor is connected to the sun gear, the mixing shaft is connected to the planetary gear, the ring gear is relatively fixed to the tank body of the mixing tank, and the planetary carrier rotates relative to the ring gear and can drive the mixing shaft to revolve around the rotating shaft of the drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a cross-sectional schematic diagram of the vibrating mixer in specific embodiment 1 of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0019] In the figure: 1-drive motor, 10-motor output shaft, 11-plum blossom elastic coupling, 2-planetary reducer, 20-sun gear shaft, 21-sun gear, 22-planetary gear, 23-upper planetary gear, 24-slewing bearing, 25-lower planetary gear, 26-output planetary gear, 27-planetary carrier, 28-reduction gear housing, 3-excitation structure, 30-agitation shaft, 31-excitation bearing, 32-roller, 4-agitation assembly, 40-sleeve, 41-agitation arm, 42-lower end plate, 43-cylindrical compression spring, 44-guide rod, 45-sealing sleeve, 5-agitation tank. DETAILED DESCRIPTION

[0020] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0021] Specific embodiment 1 of the vibration mixer of the present invention, as Figures 1 to 2As shown, the vibrating mixer is a vertical vibrating mixer, comprising a drive motor 1, a planetary reducer 2, an excitation structure 3, a stirring assembly 4, and a stirring tank 5, arranged from top to bottom. The motor output shaft 10 of the drive motor 1 is connected to the sun gear shaft 20 of the planetary reducer 2 via a plum blossom elastic coupling 11. After the planetary reducer 2 reduces torque and increases torque, power is output through multiple circumferentially distributed stirring shafts 30 that both rotate and orbit around the input shaft. The stirring shafts 30 extend from the lower end surface of the reducer housing 28 of the planetary reducer 2 and extend into the inner cavity of the cylindrical stirring tank 5.

[0022] The internal transmission structure of the planetary reducer 2 includes a sun gear 21, planetary gears 22, and upper and lower planetary gears 23 and 25, which are coaxially connected to the planetary gears 22 via the planetary gear shaft. The planetary gear shaft extends upward and is fixedly connected to the upper planetary gear 23 at its upper end. A slewing bearing 24 with an internal gear ring is fixed to the mixing tank 5. The outer ring of the slewing bearing 24 is rotatably assembled with the internal gear ring. The internal gear ring is fixed to the tank body and meshes with the upper planetary gear 23. A planet carrier 27 is bolted to the outer ring of the slewing bearing 24 and can rotate relative to the internal gear ring to drive the mixing shaft 30 and the mixing assembly 4 to revolve around the motor output shaft 10. The planetary gears 22 can be arranged in two symmetrical groups, or three or more groups.

[0023] The lower planetary gear 25 is also equipped with an output planetary gear 26 that meshes with it, achieving secondary speed reduction and torque amplification. The output planetary gear 26 is fixedly connected to the upper end of the agitator shaft 30. The agitator shaft 30 is rotatably mounted on the reducer housing 28 via a bearing and extends out of the lower end surface of the reducer housing 28. The sun gear 21 not only drives the agitator shaft 30 to rotate, but also causes it to orbit with the rotation of the planetary carrier 27. The center of the orbit is the axis of the sun gear shaft 20. The mixing assembly 4 rotates while also orbiting around the sun gear shaft 20, improving the mixing effect of the concrete.

[0024] The excitation structure 3 is mounted on the agitator shaft 30 via an excitation bearing 31 and is fixed to the reducer housing 28 above. The agitator shaft 30 extends out of the lower end of the excitation structure 3 and can rotate in the center hole of the excitation structure 3. The lower end of the excitation structure 3 is provided with circumferentially arranged rollers 32. A stirring assembly 4 is also fixedly connected to the agitator shaft 30 below the excitation structure 3. The stirring assembly 4 includes a sleeve 40 that is circumferentially fixed to the agitator shaft 30 via a spline and axially floating. The sleeve 40 can move up and down along the axial direction of the agitator shaft 30. The upper end of the sleeve 40 is provided with a circumferentially continuous annular wavy surface. In this embodiment, the annular wavy surface is a concave and convex wavy surface. In other embodiments, the concave and convex wavy surface can be regular, such as an annular serrated surface, or an irregular wavy surface. A stirring arm 41 is fixed to the circumferential side wall of the sleeve 40. The concrete material in the mixing tank 5 is stirred by the stirring arm 41 and blades.

[0025] A lower end plate 42 is fixed to the lower end of the stirring shaft 30 by a locking bolt, and a cylindrical compression spring 43 for pressing the sleeve 40 upward is provided between the lower end plate 42 and the opposite surface of the sleeve 40. The cylindrical compression springs 43 are evenly distributed around the stirring shaft 30, and a guide rod 44 is passed through each cylindrical compression spring 43. The guide rod 44 guides the cylindrical compression spring 43 when it is telescopically deformed to prevent dislocation and damage. Due to the elastic pressing effect of the cylindrical compression spring 43, the pressing structure on the sleeve 40 is in pressing contact with the concave and convex surface, ensuring that the form and amplitude of the vibration are consistent with the shape of the concave and convex surface. Compared with the vibration form of the mixer in the prior art, the up and down vibration during rotation has a more obvious vibration effect, can effectively remove cement clusters adhering to the stirring assembly 4, improves the uniformity of concrete mixing, and ensures the quality of concrete mixing.

[0026] In this embodiment, the roller 32 is provided on the vibration structure 3 as a friction-reducing structure, which reduces the wear generated when the stirring assembly 4 rotates relative to the vibration structure 3. In other embodiments, the friction-reducing structure can also be a bearing or a wear-resistant ball head or other structures. Moreover, the roller 32 is also provided on the vibration structure 3 as a top-pressure structure relative to the annular wavy surface at the upper end of the sleeve 40. The top-pressure structure is not limited to the roller 32, but can also be a push rod, etc. In other embodiments, the annular wavy surface and the top-pressure structure can also be swapped, which can also achieve the desired function, that is, the annular wavy surface is provided at the lower end of the vibration structure 3, and the top-pressure structure is provided relatively at the upper end of the sleeve 40 to be top-pressed with the annular wavy surface.

[0027] The shaft sleeve 40 is located between the excitation structure 3 and the lower end plate 42, and a circumferential sealing sleeve 45 is provided at the upper and lower ends of the shaft sleeve 40 to isolate the vibration activity space from the outside world, thereby preventing concrete materials from entering the gap and affecting the vibration effect, avoiding the occurrence of machine jams, and ensuring the working stability of the vibration mixer.

[0028] Specific embodiment 2 of the vibrating mixer of the present invention is different from specific embodiment 1 in that the stirring shaft can be a hollow shaft tube, and a fixed connecting rod is passed through the stirring shaft. The lower end of the connecting rod extends out of the shaft tube and is fixed with an excitation structure whose upper end face is a ring-shaped concave and convex surface. The stirring component is circumferentially fixed and axially floatingly installed on the stirring shaft. When rotating, it can vibrate up and down along the axial direction of the stirring shaft. The lower end of the stirring component has a top pressure structure and is in top pressure contact with the relative concave and convex surface. In this embodiment, the stirring component is on the top and the excitation structure is on the bottom.

[0029] Specific embodiment 3 of the vibration mixer of the present invention is different from specific embodiment 1 in that the elastic member can be a cylindrical tension spring, and a fixed structure is provided on the stirring shaft between the upper excitation structure and the lower shaft sleeve. The upper and lower ends of the cylindrical tension spring are respectively connected to the opposite surfaces of the fixed structure and the shaft sleeve. The cylindrical tension spring generates an upward pulling force on the shaft sleeve so that it is pressed against the uneven surface of the excitation structure, and can vibrate up and down along the uneven surface when the stirring assembly is driven to rotate.

[0030] Specific embodiment 4 of the vibrating mixer of the present invention is different from specific embodiment 1 in that the cylindrical compression spring can be sleeved on the output shaft and is located between the shaft sleeve and the lower end plate. The inner diameter of the large-diameter cylindrical compression spring is larger than the outer diameter of the stirring shaft. Compared with specific embodiment 1, the guide rod passing through the cylindrical compression spring can be omitted, thereby simplifying the structure of the entire device.

[0031] Specific embodiment 5 of the vibration mixer of the present invention is different from specific embodiment 1 in that the reduction mechanism can adopt other transmission forms in addition to the planetary reduction mechanism, such as belt drive or chain gear drive, or the planetary gear shaft in specific embodiment 1 can be directly used as the stirring shaft for rotation output, which is equivalent to eliminating the secondary reduction.

Claims

1. A vibrating mixer, comprising a drive motor, the drive motor being connected to a stirring shaft via a reduction mechanism, and the vibrating mixer also comprising a stirring tank, characterized in that: A stirring assembly is installed on the stirring shaft in a circumferentially fixed and axially floating manner. The stirring assembly extends into the stirring tank. An exciting structure is fixedly provided on one axial side of the stirring assembly relative to the casing of the speed reduction mechanism. An elastic member is also provided on one axial side of the stirring assembly to press the stirring assembly against the exciting structure. One of the stirring assembly and the exciting structure has a circumferentially continuous concave and convex surface, and the other is provided with a top pressure structure for cooperating with the concave and convex surface. When the stirring assembly rotates relative to the exciting structure, the stirring assembly vibrates up and down in the axial direction through the cooperation between the top pressure structure and the concave and convex surface. The speed reduction mechanism is a planetary speed reduction mechanism, and the planetary speed reduction mechanism includes a sun gear , planetary gears and upper and lower planetary gears that are coaxially connected to the planetary gears through planetary gear shafts. A slewing bearing with an inner ring gear is fixed on the tank body of the mixing tank. The outer ring of the slewing bearing is rotatably assembled with the inner ring gear. The inner ring gear is fixed to the tank body and meshes with the upper planetary gear. The planetary carrier is fixed to the outer ring of the slewing bearing by bolts. The lower planetary gear is meshed with the output planetary gear for deceleration. The output planetary gear is fixed to the upper end of the mixing shaft. The output shaft of the drive motor is connected to the sun gear. The planetary carrier rotates relative to the inner ring gear and can drive the mixing shaft to revolve around the rotating shaft of the drive motor. The excitation structure is sleeved on the output shaft and is located above the mixing assembly.

2. The vibration mixer according to claim 1, wherein: A stopping structure is provided at the lower end of the stirring shaft, and a compression spring for pressing the stirring assembly upward against the lower end of the excitation structure is also provided between the stopping structure and the opposite surface of the stirring assembly. The compression spring constitutes the elastic member.

3. The vibration mixer according to claim 1 or 2, characterized in that: The concave-convex surface is located on the stirring component, and the top pressure structure is relatively arranged on the excitation structure.

4. The vibration mixer according to claim 1 or 2, characterized in that: The concave-convex undulating surface is an annular wavy surface.

5. The vibration mixer according to claim 1 or 2, characterized in that: The pressing end of the pressing structure is provided with a roller which rolls with the concave and convex surface.

6. The vibration mixer according to claim 4, wherein: The stirring assembly comprises a shaft sleeve sleeved on the output shaft and a stirring arm fixed on the shaft sleeve, and the upper end surface of the shaft sleeve forms the annular wave surface.

7. The vibration mixer according to claim 6, wherein: The shaft sleeve is located between the excitation structure and the stopping structure and is also provided with an elastic sealing sleeve for circumferential sealing.

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