CN102975287A - Planetary concrete mixer - Google Patents

Abstract

The invention discloses a planetary concrete mixer, which comprises a lower cylinder body and a plurality of ribbon stirring devices, the upper part of the lower cylinder body is connected with a middle cylinder body, a planetary gear mechanism is arranged in the middle cylinder body; a cover plate is arranged at the upper end of the middle cylinder body, A stirring drive device is set on the cover plate; the middle part of the cover plate rotates and connects to the stirring input shaft; the planetary gear mechanism includes a planetary carrier, a sun gear and multiple planetary gears, the planetary carrier is connected to the lower end of the stirring input shaft, and the sun gear is sleeved on the stirring input shaft , the upper end of the sun gear is connected with the intermediate cylinder, the planetary gear shaft is set on the planet carrier, and the planetary gear is installed on the planetary gear shaft; The upper part of each stirring arm is connected by a connecting plate, the lower end of the planetary wheel shaft is connected with the connecting plate, and a vibrating mechanism is arranged inside the lower cylinder. The planetary concrete mixer can effectively improve the micro-uniformity of concrete.

Description

A planetary concrete mixer

technical field

The invention relates to a concrete mixer, in particular to a planetary concrete mixer.

Background technique

Concrete mixer is a special machine for mixing concrete batch materials evenly to make plastic concrete mixture. It is widely used in construction projects and commercial concrete factories. It is an essential machine for engineering construction. Its performance directly affects all The quality and efficiency of mixing concrete. In the prior art, the vane structure of the ordinary vertical shaft planetary mixer is relatively complicated, the mixing wear is large, and there is a strict limit on the particle size of the aggregate. It can generally make the mixed concrete macroscopically uniform in a short period of time, but if the cement slurry in the macroscopically homogeneous concrete after mixing is observed under a microscope, it will be found that the cement particles are not evenly dispersed in the water. , 10% to 30% of cement particles gather together in twos and threes to form tiny cement clusters, which affect the workability, strength and durability of concrete. In recent years, some solutions to this problem have been proposed at home and abroad. For example, many people have studied the design and arrangement of mixing blades, so as to improve the microscopic uniformity of concrete through repeated mixing without dead zones, but the results have not been proved by experiments. Not obvious.

Contents of the invention

The object of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a planetary concrete mixer. The planetary concrete mixer can effectively improve the microscopic uniformity of concrete, and has the advantages of simple structure, convenient use, good mixing effect, low production cost, and convenient popularization and use.

In order to achieve the above object, the technical solution adopted by the present invention is: a planetary concrete mixer, characterized in that it includes a lower cylinder and a plurality of ribbon stirring devices arranged inside the lower cylinder, the upper part of the lower cylinder is connected to There is an intermediate cylinder connected to the lower cylinder, and a planetary gear mechanism is arranged in the intermediate cylinder; a cover plate is provided on the upper end of the intermediate cylinder, and a stirring drive device is provided on the cover plate, and the stirring drive The power output shaft of the device passes through the cover plate and extends into the middle cylinder body, and a pinion gear is installed at the position extending into the middle cylinder body; the middle part of the cover plate is rotatably connected with a vertically arranged stirring input shaft, The lower end of the input shaft extends into the middle cylinder, the agitation input shaft is equipped with a large gear meshing with the pinion, and the cover plate is provided with a feed port for feeding materials into the middle cylinder. The bottom of the lower cylinder is provided with a discharge port; the planetary gear mechanism includes a planetary carrier, a sun gear and a plurality of planetary gears corresponding to the ribbon stirring device one by one, and the planetary carrier is connected to the lower end of the stirring input shaft, The sun gear is sleeved on the agitation input shaft and is in clearance fit with the agitation input shaft. The upper end of the sun gear is connected to the intermediate cylinder. The planet carrier is provided with planet gear shafts equivalent to the number of planet gears. The planet The wheel is installed on the planetary wheel shaft and meshed with the sun gear; the ribbon stirring device includes two stirring arms, the inner surfaces of the two stirring arms are connected with stirring ribbons, and the upper parts of the two stirring arms pass through The connecting plate is connected, the lower end of the planetary wheel shaft is connected with the connecting plate, and a vibrating mechanism installed coaxially with the stirring input shaft is arranged inside the lower cylinder.

The above-mentioned planetary concrete mixer is characterized in that: the vibrating mechanism includes a housing, a vibrating shaft and a vibrating drive device, the housing is located below the stirring input shaft, and the vibrating shaft is arranged inside the stirring input shaft, The lower end of the vibrating shaft extends into the housing and fits with the housing in a gap, the upper end of the vibrating shaft protrudes from the end cover and is connected with the vibration driving device; the part where the vibrating shaft protrudes into the housing is installed with an eccentric bearing seat 1 and eccentric bearing seat 2 located below the eccentric bearing seat 1, the eccentric bearing seat 1 is connected to the inner wall of the housing through bearing 1, and the eccentric bearing seat 2 is connected to the inner wall of the housing through bearing 2.

The above-mentioned planetary concrete mixer is characterized in that: the vibrating shaft is provided with an eccentric block for balancing the eccentric bearing seat 1 and the eccentric bearing seat 2, and the eccentric block is located between the eccentric bearing seat 1 and the eccentric bearing seat 2 between.

The above-mentioned planetary concrete mixer is characterized in that: the eccentricity of the second eccentric bearing seat is greater than the eccentricity of the first eccentric bearing seat.

The above-mentioned planetary concrete mixer is characterized in that: the eccentric block is keyed to the vibrating shaft.

The above-mentioned planetary concrete mixer is characterized in that it also includes a plurality of scraper mechanisms, each of which includes a connecting piece and a scraper, one end of the connecting piece is connected to the planet carrier, and the The other end of the connecting piece extends between the ribbon stirring device and the inner wall of the lower cylinder, and the scraper is installed on the connecting piece and is located between the connecting piece and the inner wall of the lower cylinder.

The above-mentioned planetary concrete mixer is characterized in that: the number of said ribbon agitating devices is two, the number of said planetary wheels is two, two said ribbon agitating devices and two said planetary wheels Both are symmetrical about the stirring input axis.

Compared with the prior art, the present invention has the following advantages:

1. The structure of the present invention is simple, the design is novel and reasonable, and it is easy to install.

2. When the present invention stirs concrete, the planetary frame rotates under the drive of the stirring input shaft, so that the ribbon stirring device connected to the planetary wheel shaft rotates around the planetary wheel shaft and also revolves around the stirring input shaft under the drive of the planetary frame. Revolution, under the action of splitting, pushing, rolling, lifting up and advancing to the vibrating mechanism of the mixing ribbon with both rotation and revolution movement, the circulation space of concrete increases, the relative mobility between particles is enhanced, and more Easy to disperse.

3. When the present invention stirs concrete, the vibration shaft transmits the vibration to the shell through two eccentric bearing seats and two bearings, thereby transmitting to the concrete particles. The vibration mechanism can effectively reduce the viscosity and The internal friction force increases the movement speed of the material particles and increases the number of effective collisions. It can make the cement particles vibrate, thereby destroying the cement agglomerates, making the cement particles fully and evenly distributed, and can purify the surface of the aggregate, increasing The bond between cement and aggregate.

4. The present invention sets a plurality of scraper mechanisms, so that when the planetary concrete mixer is working, under the action of the scraper mechanism, the concrete attached to the inner wall of the lower cylinder will be driven to turn over, so that the relative mobility between the particles is enhanced. , and can better ensure high-speed, clean discharge.

5. The implementation cost of the present invention is low, the use effect is good, and it is convenient to popularize and use.

In summary, the present invention has simple structure, novel and reasonable design, high working reliability and long service life. When mixing concrete, the concrete can not only achieve macroscopically uniform , and can effectively improve its microscopic uniformity.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a structural schematic diagram of the vibration mechanism of the present invention.

Explanation of reference signs:

1—lower cylinder; 1-1—outlet; 2—ribbon stirring device;

2-1—stirring arm; 2-2—stirring ribbon; 2-3—connecting plate;

3—middle cylinder; 3-1—baffle; 4—planetary carrier;

5—cover plate; 5-1—feed inlet; 6—sun gear;

7—big gear; 8—stirring input shaft; 9—stirring drive device;

10—pinion gear; 11—planetary gear shaft; 12—planetary gear;

13—connecting piece; 14—scraper; 15—vibration mechanism;

15-1—vibration drive device; 15-2—housing; 15-3—vibration shaft;

15-4—Eccentric bearing seat one; 15-5—Bearing one; 15-6—Bearing two;

15-7—eccentric bearing seat two; 15-8—eccentric block.

Detailed ways

A planetary concrete mixer as shown in Figure 1 includes a lower cylinder 1 and a plurality of ribbon stirring devices 2 arranged inside the lower cylinder 1, the upper part of the lower cylinder 1 is connected with the lower cylinder 1 The intermediate cylinder body 3 is provided with a planetary gear mechanism; the upper end of the intermediate cylinder body 3 is provided with a cover plate 5, and the cover plate 5 is provided with a stirring drive device 9, and the stirring The power output shaft of the driving device 9 passes through the cover plate 5 and extends into the middle cylinder 3, and a pinion 10 is installed at the position extending into the middle cylinder 3; Stirring input shaft 8, the lower end of the stirring input shaft 8 extends into the middle cylinder body 3, the large gear 7 meshing with the pinion 10 is installed on the stirring input shaft 8, and a useful In the feed port 5-1 for feeding material into the middle cylinder 3, the bottom of the lower cylinder 1 is provided with a discharge port 1-1; the planetary gear mechanism includes a planetary carrier 4, a sun gear 6 and the A plurality of planetary gears 12 corresponding to the ribbon stirring device 2 one-to-one, the planet carrier 4 is connected to the lower end of the stirring input shaft 8, the sun gear 6 is sleeved on the stirring input shaft 8 and is in clearance fit with the stirring input shaft 8, The upper end of the sun gear 6 is connected to the intermediate cylinder 3, specifically, the upper end of the sun gear 6 is connected to the baffle plate 3-1 on the upper part of the intermediate cylinder 3, and the planet carrier 4 is provided with a The number of wheels 12 is equivalent to the planetary wheel shaft 11, and the planetary wheel 12 is installed on the planetary wheel shaft 11 and meshed with the sun gear 6; the ribbon stirring device 2 includes two stirring arms 2-1, and the two stirring arms The inner surface of the 2-1 is connected with a stirring ribbon 2-2, the upper parts of the two stirring arms 2-1 are connected by a connecting plate 2-3, and the lower end of the planet wheel shaft 11 is connected with the connecting plate 2-3 , the inside of the lower cylinder 1 is provided with a vibrating mechanism 15 coaxially installed with the stirring input shaft 8 .

In this embodiment, the stirring drive device 9 includes a motor one and a reducer one, the output shaft of the motor one is connected with the input shaft of the reducer one, and the output shaft of the reducer one is connected with the power output shaft connected. The power output shaft is connected with the cover plate 5 and the baffle plate 3-1 through a bearing, and the planet wheel shaft 11 is connected with the planet carrier 4 through a bearing.

When in use, when the concrete is stirred, the sun gear 6 is fixed on the middle cylinder 3 and remains still, and the stirring drive device 9 drives the power output shaft to rotate, thereby driving the large gear 7 to rotate through the pinion gear 10, and then the stirring input shaft 8 rotates, the planet carrier 4 rotates under the drive of the stirring input shaft 8, so that the ribbon stirring device 2 connected to the planetary wheel shaft 11 rotates around the planetary wheel shaft 11 and also revolves around the stirring input shaft 8 driven by the planetary carrier 4 Revolution, under the action of splitting, pushing, rolling, lifting up and advancing to the vibrating mechanism 15 of the mixing screw belt 2-2 which has both rotation and revolution movement, the circulation space of concrete increases and the relative movement between particles Enhanced and easier to disperse.

1 and 2, the vibration mechanism 15 includes a housing 15-2, a vibration shaft 15-3 and a vibration drive device 15-1, the housing 15-2 is located below the stirring input shaft 8, the vibration The shaft 15-3 is arranged inside the stirring input shaft 8, the lower end of the vibrating shaft 15-3 extends into the housing 15-2 and fits with the housing 15-2 in clearance, and the upper end of the vibrating shaft 15-3 protrudes The cover 5 is also connected with the vibration drive device 15-1; the position where the vibration shaft 15-3 extends into the housing 15-2 is equipped with an eccentric bearing seat 15-4 and an eccentric bearing seat 15-4 below the eccentric bearing seat 15-4. Bearing seat two 15-7, the eccentric bearing seat one 15-4 is connected with the inner wall of the housing 15-2 through the bearing one 15-5, and the eccentric bearing seat two 15-7 is connected with the inner wall of the housing 15-2 through the bearing two 15-6 connections.

In this embodiment, the vibration driving device 15-1 includes a motor 2 and a reducer 2, the output shaft of the motor 2 is connected to the input shaft of the reducer 2, and the vibration shaft 15-3 is connected to the reducer 2 connected to the output shaft.

As shown in Figure 2, the vibration shaft 15-3 is provided with an eccentric block 15-8 for balancing the first eccentric bearing seat 15-4 and the second eccentric bearing seat 15-7, and the eccentric block 15-8 is positioned on the eccentric bearing Between seat one 15-4 and eccentric bearing seat two 15-7.

In this embodiment, the preferred method is that the eccentricity of the eccentric bearing seat 15-7 is greater than the eccentricity of the eccentric bearing seat 15-4. Usually, during the mixing process of concrete, the concrete at the lower part of the lower cylinder 1 More than the concrete on the lower cylinder body 1 top, the concrete that is positioned at the lower cylinder body 1 bottom can be effectively vibrated by the larger eccentric bearing seat 2 15-7 of the eccentric distance like this. The eccentric mass 15-8 is keyed to the vibrating shaft 15-3.

When the vibrating mechanism 15 is working, when the concrete is stirred, the vibrating shaft 15-3 will vibrate through the eccentric bearing seat 15-4 and the bearing 15-5, as well as the eccentric bearing seat 2 15-7 and the bearing 2 15-6. The vibration mechanism 15 can effectively reduce the viscosity and internal friction between concrete particles, increase the movement speed of material particles, and increase the number of effective collisions. It can make the cement particles in a vibrating state, thereby destroying the agglomeration of cement, so that the cement particles are fully and evenly distributed, and can purify the surface of the aggregate and increase the bonding force between the cement and the aggregate. When the concrete is mixed, the concrete can not only achieve macroscopic uniformity but also effectively improve its microscopic uniformity under the double action of vibration and forced stirring by the ribbon stirring device 2 .

As shown in Figure 1, the planetary concrete mixer also includes a plurality of scraper mechanisms, each of which includes a connecting piece 13 and a scraper 14, one end of the connecting piece 13 is connected to the planet carrier 4, The other end of the connecting piece 13 extends to between the ribbon stirring device 2 and the inner wall of the lower cylinder 1, and the scraper 14 is installed on the connecting piece 13 and is located between the connecting piece 13 and the inner wall of the lower cylinder 1 .

In this embodiment, by setting a plurality of scraper mechanisms, when the planetary concrete mixer is working, under the action of the scraper mechanism, it will drive the concrete attached to the inner wall of the lower cylinder 1 to turn over, so that the relative movement between the particles Enhanced performance, and can better ensure high-speed, clean discharge.

In this embodiment, preferably, the number of said ribbon agitating devices 2 is two, the number of said planetary gears 12 is two, two said ribbon agitating devices 2 and two said planetary gears 12 are symmetrical about stirring input shaft 8. When two ribbon stirring devices 2 and two planetary wheels 12 are used, the use effect of the planetary concrete mixer and the capacity of concrete can be optimized.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present invention still belong to the technology of the present invention. within the scope of protection of the scheme.

Claims (7)

1. planetary concrete mixer, it is characterized in that: comprise lower shell (1) and be arranged on the inner a plurality of helix stirring devices (2) of lower shell (1), the top of described lower shell (1) is connected with the middle cylindrical shell (3) that is connected with lower shell (1), is provided with planetary gears in the described middle cylindrical shell (3); The upper end of cylindrical shell (3) is provided with cover plate (5) in the middle of described, be provided with mixer drive (9) on the described cover plate (5), the power output shaft of described mixer drive (9) passes cover plate (5) and stretches into middle cylindrical shell (3), and the position of cylindrical shell (3) is equipped with pinion (10) in the middle of stretching into; The middle part of described cover plate (5) is rotatably connected to the stirring power shaft (8) of vertical laying, cylindrical shell (3) in the middle of the lower end of described stirring power shaft (8) is stretched into, the gear wheel (7) that is meshed with described pinion (10) is installed on the described stirring power shaft (8), be provided with on the described cover plate (5) for the charging aperture (5-1) to the interior conveying of middle cylindrical shell (3), the bottom of described lower shell (1) is provided with discharging opening (1-1); Described planetary gears comprises planet carrier (4), sun gear (6) and with described helix stirring device (2) a plurality of planetary gears (12) one to one, described planet carrier (4) is connected to and stirs power shaft (8) lower end, described sun gear (6) be enclosed within stir power shaft (8) upper and with stir power shaft (8) matched in clearance, the upper end of described sun gear (6) is connected with middle cylindrical shell (3), be provided with the planet wheel spindle (11) suitable with planetary gear (12) quantity on the described planet carrier (4), described planetary gear (12) is installed in planet wheel spindle (11) and upward and with sun gear (6) is meshed; Described helix stirring device (2) comprises two mixing arms (2-1), the medial surface of two described mixing arms (2-1) all is connected with and stirs ribbon (2-2), the top of two described mixing arms (2-1) connects by connecting plate (2-3), the lower end of described planet wheel spindle (11) is connected with connecting plate (2-3), and described lower shell (1) inside is provided with and the coaxial mounted vibrating mechanism of described stirring power shaft (8) (15).

2. a kind of planetary concrete mixer according to claim 1, it is characterized in that: described vibrating mechanism (15) comprises housing (15-2), vibrating shaft (15-3) and oscillation drive (15-1), described housing (15-2) is positioned at the below of stirring power shaft (8), described vibrating shaft (15-3) is arranged on and stirs power shaft (8) inside, the lower end of described vibrating shaft (15-3) stretch into housing (15-2) and with housing (15-2) matched in clearance, the upper end of described vibrating shaft (15-3) is stretched out end cap (5) and is connected with oscillation drive (15-1); The position that described vibrating shaft (15-3) stretches into housing (15-2) is equipped with eccentric bearing block one (15-4) and is positioned at the eccentric bearing block two (15-7) of eccentric bearing block one (15-4) below, described eccentric bearing block one (15-4) is connected by bearing one (15-5) with housing (15-2) inwall, and described eccentric bearing block two (15-7) is connected by bearing two (15-6) with housing (15-2) inwall.

3. a kind of planetary concrete mixer according to claim 2, it is characterized in that: be provided with the eccentric block (15-8) for balance eccentric bearing block one (15-4) and eccentric bearing block two (15-7) on the described vibrating shaft (15-3), described eccentric block (15-8) is positioned between eccentric bearing block one (15-4) and the eccentric bearing block two (15-7).

4. a kind of planetary concrete mixer according to claim 2, it is characterized in that: the eccentric throw of described eccentric bearing block two (15-7) is greater than the eccentric throw of eccentric bearing block one (15-4).

5. a kind of planetary concrete mixer according to claim 4, it is characterized in that: described eccentric block (15-8) is connected with vibrating shaft (15-3) key.

6. a kind of planetary concrete mixer according to claim 1, it is characterized in that: also comprise a plurality of scraping plate mechanisms, a plurality of described scraping plate mechanisms include connector (13) and scraper plate (14), one end of described connector (13) is connected with planet carrier (4), the other end of described connector (13) extends between the inwall of helix stirring device (2) and lower shell (1), and described scraper plate (14) is installed in connector (13) upward and is positioned between the inwall of connector (13) and lower shell (1).

7. a kind of planetary concrete mixer according to claim 1, it is characterized in that: the quantity of described helix stirring device (2) is two, the quantity of described planetary gear (12) is two, and two described helix stirring devices (2) and two described planetary gears (12) are all symmetrical about stirring power shaft (8).

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