CN103406993A - Stirring arm, stirring device and stirrer - Google Patents
Stirring arm, stirring device and stirrer Download PDFInfo
- Publication number
- CN103406993A CN103406993A CN2013101848634A CN201310184863A CN103406993A CN 103406993 A CN103406993 A CN 103406993A CN 2013101848634 A CN2013101848634 A CN 2013101848634A CN 201310184863 A CN201310184863 A CN 201310184863A CN 103406993 A CN103406993 A CN 103406993A
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- ribbon blade
- shaft
- feeding
- blade
- mixing arm
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Abstract
The invention discloses a stirring arm, a stirring device comprising the stirring arm and a stirrer comprising the stirring device, wherein the stirring arm comprises a stirring shaft (2) and spiral band blades (1), wherein the spiral band blades (1) are connected to the stirring shaft (2) and are axially arranged along the stirring shaft (2); the outer side surfaces of the spiral band blades (1) are provided bulged parts (10) protruding along the radial direction of the stirring shaft. According to the invention, the outer side surfaces of the spiral band blades are provided with the bulged parts, so that when a plurality of stirring arms are arranged in a stirring cylinder, materials flow at the clearance parts formed by the bulged parts, so that materials are prevented from being extruded to the inner wall of the stirring cylinder; the contact between materials and the inner wall of the stirring cylinder is reduced, and further the abrasion to the inner wall of the stirring cylinder is reduced, thus the service life of the stirring cylinder is prolonged, and therefore, the stirring device adopting the stirring arm and the stirrer correspondingly have relatively high working reliability.
Description
Technical field
The present invention relates to engineering machinery field, particularly, relate to a kind of mixing arm, comprise the agitating device of this mixing arm and comprise the mixer of this agitating device.
Background technology
Concrete mixer (abbreviation mixer) is a kind of engineering machinery that cement, sandstone aggregate and water mixing mixing is become to concrete mixture, mixer comprises a mixing bowl (or mixing drum) and is arranged in a mixing bowl the blade-carrying mixing arm that can be rotated, with the rotation by mixing arm, material is uniformly mixed.
Existing mixer is generally used the blade type mixing arm, and production efficiency is low.Spiral ribbon mixer due to the ribbon blade in motion process, make mixed material always with a mixing bowl inwall on the liner plate friction, thereby cause the abrasion-proof backing block of a mixing bowl very easily to wear and tear.
Summary of the invention
The purpose of this invention is to provide a kind of mixing arm, when being arranged on this mixing arm in a mixing bowl, can reduce the wearing and tearing of material to a mixing bowl.
To achieve these goals, the invention provides a kind of mixing arm, wherein, described mixing arm comprises shaft and is connected in this shaft and, along the axial arranged ribbon blade of this shaft, on the lateral surface of this ribbon blade, is provided with the radially outstanding protuberance along described shaft.
Preferably, described ribbon blade axially being fixed on described shaft by a plurality of connectors along described shaft.
Preferably, described protuberance is positioned on the position of maximum radius of axis of the described shaft of distance of described ribbon blade.
Preferably, described ribbon blade comprises feeding ribbon blade and returns to the ribbon blade, described feeding ribbon blade and the described ribbon blade that returns have the opposite hand of spiral, and described feeding ribbon blade and/or described returning on the ribbon blade are provided with described protuberance.
Preferably, described feeding ribbon blade is included on the optional position of described shaft axis the outer ribbon blade of feeding and the feeding ribbon blade that the relative both sides that are positioned at described shaft are arranged, the outer ribbon blade of described feeding is identical with the hand of spiral of ribbon blade in described feeding, and the outer ribbon blade pitch of described feeding is greater than ribbon blade pitch in described feeding from the maximum radius of the axis of described shaft and, from the maximum radius of described shaft, is provided with described protuberance on the outer ribbon blade of described feeding.
Preferably, describedly return on the optional position that the ribbon blade is included in described shaft axis the relative both sides that are positioned at described shaft arrange return to outer ribbon blade and return to the ribbon blade, it is described that to return to outer ribbon blade identical with the described hand of spiral of returning to interior ribbon blade, and describedly return to outer ribbon blade pitch and be greater than the described maximum radius of interior ribbon blade pitch from the axis of described shaft of returning from the maximum radius of the axis of described shaft, described returning on outer ribbon blade is provided with described protuberance.
Preferably, continuous ribbon blade in the middle of described ribbon blade also comprises, the continuous ribbon blade pass in this centre is crossed connector and is fixed on described shaft, and the continuous ribbon blade in described centre, described feeding ribbon blade and described returning between the ribbon blade, is provided with described protuberance on the continuous ribbon blade in described centre.
Preferably, the continuous ribbon blade in described centre is identical with the hand of spiral of described feeding ribbon blade.
Preferably, the continuous ribbon blade in described centre is included on the optional position of described shaft axis the centre the relative both sides that are positioned at described shaft arranged outer ribbon blade and middle continuous ribbon blade continuously, the continuous outer ribbon blade pitch in described centre is greater than the maximum radius of the continuously interior ribbon blade pitch in described centre from the axis of described shaft from the maximum radius of the axis of described shaft, and described centre is provided with described protuberance on outer ribbon blade continuously.
Another object of the present invention is to provide a kind of agitating device, and this agitating device has relatively high functional reliability.
In order to realize above-mentioned another purpose, the invention provides a kind of agitating device, this agitating device comprises a mixing bowl and the mixing arm be arranged in this a mixing bowl, and this mixing arm is above-mentioned mixing arm, and forms gap between the inwall of the described protuberance of mixing arm and described a mixing bowl.
An also purpose of the present invention is to provide a kind of mixer, and this mixer has relatively high functional reliability.
In order to realize an above-mentioned also purpose, the invention provides a kind of mixer that comprises above-mentioned agitating device.
The present invention is by arranging protuberance on the lateral surface at the ribbon blade, with when being arranged on a plurality of mixing arms in a mixing bowl, make material flow at the gap location formed due to protuberance, thereby prevent that material is extruded into the inwall of a mixing bowl, reduce contacting between the inwall of material and a mixing bowl, and then the wearing and tearing of minimizing a mixing bowl inwall, to improve the service life of a mixing bowl.Therefore, adopt that the agitating device of this mixing arm and mixer are corresponding has a higher functional reliability.
Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.
The accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms the part of specification, with the following specific embodiment one, is used from explanation the present invention, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of mixing arm of the present invention.
Description of reference numerals
1 ribbon blade 2 shafts
3 connector 10 protuberances
11 feeding ribbon blades 12 return to the ribbon blade
The outer ribbon blade of continuous ribbon blade 111 feedings in the middle of 13
In 112 feedings, ribbon blade 121 returns to outer ribbon blade
122 return to the middle outer ribbon blade continuously of interior ribbon blade 131
Continuously interior ribbon blade in the middle of 132
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Referring to Fig. 1, the present invention relates to a kind of mixing arm, this mixing arm mainly comprises shaft 2 and is connected in this shaft 2 and along the axial arranged ribbon blade 1 of this shaft 2, and on the lateral surface of this ribbon blade 1, is provided with the radially outstanding protuberance 10 along shaft 2.By this structure, can be found out, when in a mixing bowl that a plurality of mixing arms of the present invention is applied in to agitating device, carrying out material stirring, setting due to protuberance 10, make (between the part that protuberance 10 is not set of ribbon blade) between a plurality of mixing arms form gap, material can flow by the gap location between mixing arm like this, stirring sandstone in material etc. when preventing that material is extruded into the inwall of a mixing bowl is stuck between ribbon blade and a mixing bowl, thereby reducing material contacts with the inwall of a mixing bowl, and then the wearing and tearing of minimizing a mixing bowl inwall, improve the service life of a mixing bowl.
Wherein, it should be noted that, " lateral surface " of ribbon blade 1 refers to the one side of shaft 2 dorsad.And " ribbon blade " refers to the spiral shape blade extended continuously vertically well-known to those skilled in the art.And wherein said shaft 2 can be the shaft 2 that only is connected in two coaxial lines at ribbon blade 1 two ends, it can be also the continuous shaft 2 that runs through as shown in Figure 1 whole axis direction.
For under the shown in Figure 1 structure that runs through the continuous axle of whole axis direction, ribbon blade 1 is axially being fixed on described shaft 2 by a plurality of connectors 3 along described shaft 2 preferably at shaft 2.As seen from the figure, because ribbon blade 1 extends axially spirally around shaft 2, thereby the radius apart from the axis of shaft 2 also will be correspondingly different on diverse location for ribbon blade 1.Therefore, while by connector 3, connecting, the length of connector 3 changes thereupon, to adapt to the distance between ribbon blade 1 and shaft 2.
Be appreciated that described protuberance 10 can be along the lateral surface of ribbon blade 1 continuously or the setting at interval.In the preferred embodiment of the present invention, protuberance 10 is arranged on the position of maximum radius of the axis apart from shaft 2 that is positioned at ribbon blade 1.Due to mixing arm the rotation with the process stirred in, ribbon blade 1 apart from the maximum radius place of the axis of shaft 2 will be and the immediate position of the inwall of a mixing bowl, therefore, protuberance 10 is arranged on this position, gap between mixing arm and a mixing bowl inwall can be set directly, effectively, in order to reduce the wearing and tearing to a mixing bowl inwall.
In the specific embodiment, ribbon blade 1 can comprise the various structures form, and in the present invention, ribbon blade 1 can comprise feeding ribbon blade 11 and return to ribbon blade 12.Wherein, feeding ribbon blade 11 is mainly used in stirring operation, material being stirred, and returns to ribbon blade 12 and is mainly used for making material in a mixing bowl, to form circulation.Therefore, feeding ribbon blade 11 and return to ribbon blade 12 and should have the opposite hand of spiral.Under this structure, 10 of protuberances can only be arranged on feeding ribbon blade 11 and return on the one in ribbon blade 12, also can be arranged on simultaneously feeding ribbon blade 11 and return on ribbon blade 12.In a preferred embodiment, feeding ribbon blade 11 and return on ribbon blade 12 and be provided with protuberance 10, with guarantee mixing arm on each position can and a mixing bowl between keep roughly gap uniformly.
It should be explained that, in said structure, feeding ribbon blade 11 refers on the contrary with " hand of spiral is opposite " of returning to ribbon blade 12, when take an end of mixing arm, be benchmark, the one of above-mentioned two kinds of ribbon blades 11 extends spirally around shaft 2 along clockwise direction, another one extends spirally around shaft 2 in the counterclockwise direction, thereby form the opposite version of the hand of spiral, so that the material stirred forms circulating stirring in a mixing bowl.In addition, although the feeding ribbon blade 11 shown in Fig. 1 is with to return to ribbon blade 12 extends on shaft 2 length different, but, demand according to the reality stirring, can and return to ribbon blade 12 by feeding ribbon blade 11 and be arranged on shaft 2 and have identical development length, to form symmetrical structure.
In different embodiments, the ribbon blade can extend spirally with the form of single blade, also can extend spirally with the form of twayblade.
As shown in Figure 1, for improving the stirring efficiency that stirs operation, preferably feeding ribbon blade 11 is arranged as to the twayblade form.Thereby feeding ribbon blade 11 can be included on the optional position of shaft 2 axis the outer ribbon blade 111 of feeding and the feeding ribbon blade 112 that the relative both sides that are positioned at shaft 2 are arranged.Wherein, the hand of spiral identical (if deasil extended spirally around shaft 2) of the outer ribbon blade 111 of feeding and the interior ribbon blade 112 of feeding, so that identical mixing direction to be provided, guarantee to stir the uniformity of material.And feeding ribbon blade 11 can be set to the outer ribbon blade 111 of feeding and be greater than in feeding ribbon blade 112 apart from the maximum radius of shaft 2 apart from the maximum radius of the axis of shaft 2, like this, the feeding ribbon blade that different-diameter is set stirs material at diverse location, thereby can to material, be uniformly mixed more equably.Under the structure of above-mentioned feeding ribbon blade 11, more near the inwall of a mixing bowl, thereby protuberance 10 preferably is arranged on the outer ribbon blade 111 of feeding due to the outer ribbon blade 111 of feeding, with the wearing and tearing of the inwall that reduces a mixing bowl.
In addition, be to improve the stirring efficiency of material, return to the relative both sides that are positioned at shaft 2 on the optional position that ribbon blade 12 also can be included in shaft 2 axis similarly arrange return to outer ribbon blade 121 and return to ribbon blade 122.Wherein, return to outer ribbon blade 121 identical with the hand of spiral of returning to interior ribbon blade 122, so that the circulation stirring operation to be provided in a mixing bowl.Simultaneously, return to outer ribbon blade 121 and be greater than and return to the maximum radius of interior ribbon blade 122 apart from the axis of shaft 2 apart from the maximum radius of the axis of shaft 2, so that the material that is in diverse location is carried out to circulation stirring.In like manner, protuberance 10 is arranged on and returns on outer ribbon blade 121, with the wearing and tearing of the inwall that reduces a mixing bowl.
As previously mentioned, feeding ribbon blade of the present invention 11 and return to ribbon blade 12 and have the opposite hand of spiral, thereby the situation of ribbon blade may appear not having in above-mentioned both positions that have a common boundary on shaft 2, reduced the mixing position of material.For this reason, the present invention is ribbon blade 1 continuous ribbon blade 13 in the middle of also including on mixing arm preferably, this centre ribbon blade 13 continuously is fixed on shaft 2 by connector 3 equally, and middle ribbon blade 13 continuously at feeding ribbon blade 11 with return between ribbon blade 12 so that butt feeding ribbon blade 11 and return to ribbon blade 12 well.As shown in Figure 1, protuberance 10 also can be arranged on middle ribbon blade 13 continuously, so that between mixing arm and a mixing bowl, keep roughly uniform gap.
In embodiments of the present invention, middle ribbon blade 13 is identical with the hand of spiral of feeding ribbon blade 11 continuously, but is not limited to this.
Under the twayblade form, middle ribbon blade 13 continuously further can be included in the continuously outer ribbon blade 131 in centre and the middle continuous ribbon blade 132 that the relative both sides that are positioned at shaft 2 on the optional position of shaft 2 axis are arranged, the continuous outer ribbon blade 131 in centre is greater than the maximum radius of middle continuously interior ribbon blade 132 apart from the axis of shaft 2 apart from the maximum radius of the axis of shaft 2, and preferably protuberance 10 is arranged on middle continuous outer ribbon blade 131.
In the present invention, protuberance 10 is arranged on ribbon blade 1 and can be accomplished in several ways, for example, protuberance 10 can be directly and ribbon blade 1 integrally formed, also can be fixed on ribbon blade 1 by modes such as welding, bolt connections.In addition, as seen from Figure 1, in the specific embodiment, be positioned on ribbon blade 1 lateral surface with respect to the shoulder 10a that protrudes from ribbon blade 1 can also be set on the both sides of protuberance 10, further to reduce the wearing and tearing of material to the inwall of a mixing bowl.
Therefore, on the basis of describing above-mentioned mixing arm, the present invention can relate to a kind of agitating device (not shown) and a kind of mixer that comprises this agitating device.Wherein, agitating device comprises a mixing bowl and is arranged on the mixing arm in this a mixing bowl, this mixing arm is above-described mixing arm, and make between the inwall of the protuberance 10 of mixing arm and a mixing bowl and form gap, further to reduce the wearing and tearing of material to the inwall of a mixing bowl, say further, reduce being arranged on the wearing and tearing of the liner plate on a mixing bowl inwall, thereby improve the service life of a mixing bowl, and then improve the functional reliability of agitating device and mixer.Also it should be noted that, described agitating device also should comprise some other parts and syndeton etc., and these parts and syndeton are all well-known to those skilled in the art, thereby repeat no more.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible combinations.
In addition, also can carry out any combination between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. mixing arm, wherein, described mixing arm comprises shaft (2) and is connected in this shaft (2) and, along the axial arranged ribbon blade (1) of this shaft (2), on the lateral surface of this ribbon blade (1), is provided with the radially outstanding protuberance (10) along described shaft.
2. mixing arm according to claim 1, wherein, described ribbon blade (1) axially is fixed on described shaft (2) by a plurality of connectors (3) along described shaft (2).
3. mixing arm according to claim 1 and 2, wherein, described protuberance (10) is positioned on the position of maximum radius of axis of the described shaft of distance (2) of described ribbon blade (1).
4. mixing arm according to claim 3, wherein, described ribbon blade (1) comprises feeding ribbon blade (11) and returns to ribbon blade (12), described feeding ribbon blade (11) and the described ribbon blade (12) that returns have the opposite hand of spiral, and described feeding ribbon blade (11) and/or described returning on ribbon blade (12) are provided with described protuberance (10).
5. mixing arm according to claim 4, wherein, described feeding ribbon blade (11) is included on the optional position of described shaft (2) axis the outer ribbon blade (111) of feeding and the feeding ribbon blade (112) that the relative both sides that are positioned at described shaft (2) are arranged, the outer ribbon blade (111) of described feeding is identical with the hand of spiral of ribbon blade (112) in described feeding, and the maximum radius of the axis of outer ribbon blade (111) the described shaft of distance of described feeding (2) is greater than the maximum radius of ribbon blade (112) the described shaft of distance (2) in described feeding, on the outer ribbon blade (111) of described feeding, be provided with described protuberance (10).
6. mixing arm according to claim 4, wherein, describedly return on the optional position that ribbon blade (12) is included in described shaft (2) axis the relative both sides that are positioned at described shaft (2) arrange return to outer ribbon blade (121) and return to ribbon blade (122), the described outer ribbon blade (121) that returns is identical with the described hand of spiral of returning to interior ribbon blade (122), and the described maximum radius of returning to the axis of outer ribbon blade (121) the described shaft of distance (2) is greater than the described maximum radius of returning to the axis of interior ribbon blade (122) the described shaft of distance (2), described returning on outer ribbon blade (121) is provided with described protuberance (10).
7. mixing arm according to claim 4, wherein, continuous ribbon blade (13) in the middle of described ribbon blade (1) also comprises, this centre ribbon blade (13) continuously is fixed on described shaft (2) by connector (3), and the continuous ribbon blade in described centre (13) is positioned at described feeding ribbon blade (11) and described returning between ribbon blade (12), on the continuous ribbon blade in described centre (13), is provided with described protuberance (10).
8. mixing arm according to claim 7, wherein, the continuous ribbon blade in described centre (13) is identical with the hand of spiral of described feeding ribbon blade (11).
9. mixing arm according to claim 8, wherein, the continuous ribbon blade in described centre (13) is included on the optional position of described shaft (2) axis the centre the relative both sides that are positioned at described shaft (2) the arranged continuous ribbon blade (132) of outer ribbon blade (131) and centre continuously, the described centre maximum radius of the axis of outer ribbon blade (131) the described shaft of distance (2) continuously is greater than the maximum radius of the continuously interior ribbon blade (132) in described centre apart from the axis of described shaft (2), described centre is provided with described protuberance (10) on outer ribbon blade (131) continuously.
10. agitating device, wherein, described agitating device comprises a mixing bowl and the mixing arm be arranged in this a mixing bowl, and this mixing arm is according to the described mixing arm of any one in claim 1 to 9, and forms gap between the inwall of described protuberance (10) and described a mixing bowl.
11. mixer, wherein, described mixer comprises agitating device according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184863.4A CN103406993B (en) | 2013-05-17 | 2013-05-17 | Mixing arm, agitating device and mixer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184863.4A CN103406993B (en) | 2013-05-17 | 2013-05-17 | Mixing arm, agitating device and mixer |
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| Publication Number | Publication Date |
|---|---|
| CN103406993A true CN103406993A (en) | 2013-11-27 |
| CN103406993B CN103406993B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310184863.4A Active CN103406993B (en) | 2013-05-17 | 2013-05-17 | Mixing arm, agitating device and mixer |
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| CN (1) | CN103406993B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104939686A (en) * | 2014-03-28 | 2015-09-30 | 深圳市繁兴科技有限公司 | Cooking material stirring device and cooking equipment |
| CN106827238A (en) * | 2017-04-01 | 2017-06-13 | 江苏沃尔夫机械有限公司 | A kind of helical ribbon agitator |
| CN107471433A (en) * | 2017-09-08 | 2017-12-15 | 郭颂怡 | Mixing arm, agitating device |
| CN107584654A (en) * | 2017-10-16 | 2018-01-16 | 珠海仕高玛机械设备有限公司 | A kind of helical ribbon concrete stirring system of shaft type four |
| CN109773997A (en) * | 2019-03-18 | 2019-05-21 | 重庆平伟汽车零部件有限公司 | Rabbling mechanism, agitating device, mixing taste removal system and application method |
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| CA1066267A (en) * | 1978-10-31 | 1979-11-13 | London Concrete Machinery Co. (A Division Of Hodgson Machine And Equipme Nt Ltd.) | Mixing blades of concrete mixing drums |
| US4188127A (en) * | 1978-11-06 | 1980-02-12 | London Concrete Machinery Co. | Mixing blades of concrete mixing drums |
| CN201872249U (en) * | 2010-10-18 | 2011-06-22 | 黄建军 | Double-helix stirring device |
| CN202507384U (en) * | 2012-03-02 | 2012-10-31 | 三一重工股份有限公司 | Stirrer with two horizontal shafts and stirring shaft of stirrer |
| CN103101112A (en) * | 2011-11-09 | 2013-05-15 | 徐工集团工程机械股份有限公司 | Novel elastic stirring blade for concrete hopper |
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2013
- 2013-05-17 CN CN201310184863.4A patent/CN103406993B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1066267A (en) * | 1978-10-31 | 1979-11-13 | London Concrete Machinery Co. (A Division Of Hodgson Machine And Equipme Nt Ltd.) | Mixing blades of concrete mixing drums |
| US4188127A (en) * | 1978-11-06 | 1980-02-12 | London Concrete Machinery Co. | Mixing blades of concrete mixing drums |
| CN201872249U (en) * | 2010-10-18 | 2011-06-22 | 黄建军 | Double-helix stirring device |
| CN103101112A (en) * | 2011-11-09 | 2013-05-15 | 徐工集团工程机械股份有限公司 | Novel elastic stirring blade for concrete hopper |
| CN202507384U (en) * | 2012-03-02 | 2012-10-31 | 三一重工股份有限公司 | Stirrer with two horizontal shafts and stirring shaft of stirrer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104939686A (en) * | 2014-03-28 | 2015-09-30 | 深圳市繁兴科技有限公司 | Cooking material stirring device and cooking equipment |
| CN106827238A (en) * | 2017-04-01 | 2017-06-13 | 江苏沃尔夫机械有限公司 | A kind of helical ribbon agitator |
| CN107471433A (en) * | 2017-09-08 | 2017-12-15 | 郭颂怡 | Mixing arm, agitating device |
| CN107584654A (en) * | 2017-10-16 | 2018-01-16 | 珠海仕高玛机械设备有限公司 | A kind of helical ribbon concrete stirring system of shaft type four |
| CN109773997A (en) * | 2019-03-18 | 2019-05-21 | 重庆平伟汽车零部件有限公司 | Rabbling mechanism, agitating device, mixing taste removal system and application method |
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|---|---|
| CN103406993B (en) | 2016-01-13 |
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Effective date of registration: 20201009 Address after: No.202 Xuanfu street, Xuanhua District, Zhangjiakou, Hebei Province Patentee after: Hebei Leisa Heavy Construction Machinery Co., Ltd Address before: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |
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