CN202248920U - Arm support of concrete pump truck and concrete pump truck - Google Patents
Arm support of concrete pump truck and concrete pump truck Download PDFInfo
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- CN202248920U CN202248920U CN2011203858834U CN201120385883U CN202248920U CN 202248920 U CN202248920 U CN 202248920U CN 2011203858834 U CN2011203858834 U CN 2011203858834U CN 201120385883 U CN201120385883 U CN 201120385883U CN 202248920 U CN202248920 U CN 202248920U
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- 230000007246 mechanism Effects 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 claims description 2
- 230000014509 gene expression Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model provides a concrete pump truck's cantilever crane, this cantilever crane have fold condition and expansion state, the cantilever crane is including six sections at least arm festivals of articulated in proper order fold condition, first festival and second festival arm festival are located first vertical face, and the fourth festival is located the vertical face of second to last festival arm festival, and first vertical face and the vertical face of second are parallel to each other and spaced apart, and the third festival arm festival extends between first vertical face and the vertical face of second, and first festival is folded towards the first direction to fifth festival arm festival, and sixth festival arm festival is folded onto fifth festival towards the second direction opposite with the first direction. The utility model also provides a concrete pump truck of including above-mentioned cantilever crane. Through the technical scheme, the conveying distance of concrete can be increased as far as possible when the arm support is unfolded under the condition that the overall size of the pump truck is basically not increased in a folded state.
Description
Technical field
The utility model relates to concrete or other constructional materials conveying equipments, particularly, and the concrete mixer that relates to a kind of jib of concrete mixer and comprise this jib.
Background technology
Concrete pump truck (also can abbreviate " concrete mixer " perhaps " pump truck " as) is that concrete pump and articulated boom are installed on the automobile chassis, and lays concrete conveying pipe along jib, finally exports concrete conveying machinery through end hose.Articulated boom has folded state and deployed condition.When folded state, the jib folding and retraction is to the chassis, so that pump truck is in travels down.In deployed condition, jib launches, with remote fluid concrete.
Known ground, the folded form of jib mainly contains R shape, Z-shaped and RZ shape.R shape folding mode is meant single oil cylinder joint, and for example clockwise direction is folding facing one direction with the mode of reeling or intervolving, and for example counterclockwise launches in the opposite direction.Z-shaped folding mode is meant the folding or expansion with opposite successively direction of single oil cylinder joint.RZ shape is R shape and Z-shaped combination.In order to obtain farther fed distance, need use more single oil cylinder joint.Yet at folded state, pump truck will receive the restriction of road driving condition inevitably when travels down, and for example the length and width height of pump truck all will receive the restriction of road driving standard under folded state, so can not unrestrictedly increase the joint number of arm joint.At present, number generally can be above six joints successively for the arm of the jib of concrete mixer.
How guaranteeing that pump truck under the folded state can satisfy the requirement of road driving condition, can when jib launches, increase concrete fed distance as much as possible again, be the long-standing difficult problem in this area always.
The utility model content
The purpose of the utility model provides a kind of jib of concrete mixer, and it is not increasing under the situation of pump truck overall dimensions under the folded state basically, can when jib launches, improve concrete fed distance as much as possible.
To achieve these goals, the utility model provides a kind of jib of concrete mixer, and this jib has folded state and deployed condition; It is characterized in that said jib comprises at least six hinged successively joint arm joints, at said folded state; The first segment and the second joint arm joint are positioned on first longitudinal surface; The extremely minor details arm joint of the 4th joint is positioned on second longitudinal surface, and first longitudinal surface and second longitudinal surface are parallel to each other and are spaced apart, and the 3rd joint arm joint extends between first longitudinal surface and second longitudinal surface; First segment to the five joint arm joints are folding towards first direction, and the 6th joint arm joint court second direction opposite with first direction folds on the 5th joint arm joint.
Preferably, said jib comprises at least six hinged successively joint arm joints, at said folded state; The first segment and the second joint arm joint are positioned on first longitudinal surface; The extremely minor details arm joint of the 4th joint is positioned on second longitudinal surface, and first longitudinal surface and second longitudinal surface are parallel to each other and are spaced apart, and the 3rd joint arm joint extends between first longitudinal surface and second longitudinal surface; First segment to the five joint arm joints are folding towards first direction, and the 6th joint arm joint court second direction opposite with first direction folds on the 5th joint arm joint.
Preferably, said jib comprises seven joint arm joints, and at said folded state, said the 6th joint and the 7th joint arm joint are linearly arranged and all folded on the 5th joint arm joint.
Preferably; Said the 3rd joint arm joint comprises first, mid portion and second portion; Said first is positioned on said first longitudinal surface, and said second portion is positioned on said second longitudinal surface, and said mid portion is between said first and second portion.
Preferably, in first segment to the five joint arm joints, the angulation scope is the 0-180 degree between the adjacent two joint arm joints.
Preferably, the angulation scope is the 0-210 degree between the 5th joint and the 6th joint arm joint.
Preferably, the 6th joint arm is energy-conservation enough folding with respect to said the 7th joint arm joint with said first direction.
Preferably, the angulation scope is the 90-180 degree between the 6th joint and the 7th joint arm joint.
Preferably, drive folding through hydraulic drive mechanism and linkage between the adjacent two joint arms joints and launch, have at least a joint arm to save in these adjacent two joint arms joints and have groove, this groove is suitable for holding at least in part this hydraulic drive mechanism.
Preferably, the crooked toward each other space that is suitable for arranging said linkage with formation of the end that is hinged of these adjacent two joint arm joints.
Preferably, have at least a joint arm joint to comprise at least the first section and second section in the said jib,, linearly arrange for said at least the first section and second section at said folded state.
In addition, the utility model also provides a kind of concrete mixer, comprises automobile chassis, turntable and jib, and this jib is installed on the chassis through turntable, and wherein this jib is the arm joint that the utility model provides.
Pass through technique scheme; The single oil cylinder joint of jib is divided into two longitudinal surfaces layouts; Adopt unique folding mode simultaneously, promptly first segment to the five joint arm joints are folding towards first direction, and the 6th joint arm joint court second direction opposite with first direction folds on the 5th joint arm joint; Basically do not increasing under the situation of pump truck overall dimensions under the folded state, can when jib launches, improve concrete fed distance as much as possible.
Other feature and advantage of the utility model will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of manual, is used to explain the utility model with the following specific embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the side schematic view according to the concrete mixer of a kind of embodiment of the utility model.
Fig. 2 is the schematic perspective view of jib part among Fig. 1.
Fig. 3 has mainly shown the structure between turntable 16, first segment arm the joint 21 and second joint arm joint 22.
Fig. 4 is the lateral view of Fig. 3.
Fig. 5 has mainly shown the structure between the second joint arm joint the 22 and the 3rd joint arm joint 23.
Fig. 6 is the lateral view of Fig. 5.
Fig. 7 has mainly shown the structure between the 3rd joint arm joint the 23 and the 4th joint arm joint 24.
Fig. 8 is the lateral view of Fig. 7.
Fig. 9 has mainly shown the structure between the 4th joint arm joint the 24 and the 5th joint arm joint 25.
Figure 10 is the lateral view of Fig. 9.
Figure 11 has mainly shown the structure between the 5th joint arm joint the 25, the 6th joint arm joint the 26 and the 7th joint arm joint 27.
Figure 12 is the lateral view of Figure 11.
Figure 13 has shown the part of the jib that is in deployed condition.
Figure 14 has shown another part of the jib that is in deployed condition.
The specific embodiment
Be elaborated below in conjunction with the specific embodiment of accompanying drawing to the utility model.Should be understood that the specific embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.
As shown in Figure 1, concrete mixer mainly comprises automobile chassis 11 by Reference numeral 10 expressions, and this automobile chassis 11 has driver's cabin 12 and vehicle frame 13, and jib 15 is installed on the vehicle frame 13 through turntable 16.Jib 15 shown in Fig. 1 has seven joint arm joint 21-27 altogether; From turntable 16 beginnings; Be first segment arm joint 21, the second joint arm joint the 22, the 3rd joint arm joint the 23, the 4th joint arm joint the 24, the 5th joint arm joint the 25, the 6th joint arm joint the 26 and the 7th joint arm joint 27 successively, be hinged between the alternate arm joint.Jib 15 can rotate the 0-360 degree with axis X platform 16 rotation that rotates under the preferable case.When deployed condition, jib 15 can reach at utmost is approximately 80m or longer.In addition, for convenience, when jib launches (with reference to Figure 13 and Figure 14), the side of every joint arm joint towards ground is referred to as " inner surface ", representes that with Reference numeral 19 side that deviates from ground is referred to as " external surface ", representes with Reference numeral 20.
In the jib of the concrete mixer of the utility model, can the arm joint be divided into two groups, promptly; As shown in Figure 2; When jib 15 was in folded state, the first segment and the second joint arm joint 21 and 22 were positioned on the first longitudinal surface P, constitute first group of arm joint 17; The 4th joint to the 7th joint arm joint 24 to 27 is positioned on the second longitudinal surface T; Constitute second group of arm joint 18, the first longitudinal surface P and the second longitudinal surface T is parallel to each other and spaced apart predetermined distance B, the 3rd joint arm joint 23 extends between the first longitudinal surface P and the second longitudinal surface T.Simultaneously, first segment to the five joint arm joints 21 to 25 are towards first direction V1 folding (R shape is folding), and the 6th joint arm joint 26 folds into (promptly the 4th joint to the 6th joint arm joint 24 to 26 is with Z-shaped folding) on the 5th joint arm joint 25 with opposite second direction V2.The 7th joint arm joint the 27 and the 6th joint arm joint 26 is linearly arranged and is folded on the 5th joint arm joint 25.In this way, when jib is folding, can reduce size such as the length and width and the height of pump truck as best one can.When jib launches, then can farthest increase the maximum length of jib.
Need to prove that in addition as preferred embodiment a kind of, the 7th joint arm joint the 27 and the 6th joint arm joint 26 is linearly arranged and is folded on the 5th joint arm joint 25, but the utility model is not limited thereto.In other words, the 7th joint arm joint the 27 and the 6th joint arm joint 26 also can be regarded two sections that a joint arm saves as.Other arms joint, for example in first segment to the five joint arms joints, the arm joint also can adopt this structure arbitrarily, promptly is divided into two sections even multistage more, and this belongs to the protection domain of the utility model equally.
Below, will explain more specifically the jib of the concrete mixer of the utility model.
Fig. 3 has mainly shown the structure between turntable 16, first segment arm the joint 21 and second joint arm joint 22.Fig. 4 is the lateral view of Fig. 3.
Like Fig. 3 and shown in Figure 4, an end of first segment arm joint 21 is hinged on the turntable 16 in known manner, and the other end and second saves arm and saves 22 hinged.Mark 29 expression first driving mechanism such as hydraulic cylinders are used to drive first segment arm joint 21 and rotate in vertical direction with respect to turntable 16, and rotational angle is preferably the 0-90 degree.Mark 31 expression second driving mechanism such as hydraulic cylinders, it drives the first segment arm through first connecting rod mechanism 30 and saves folding each other and expansion between the 21 and second joint arm joint 22, and rotational angle is preferably the 0-180 degree.Mark 32 expression bearings, second driving mechanism 31 is hinged on the first segment arm joint 21 through this bearing 32.In addition, on each joint arm joint, have Connection Block 67, concrete conveying pipe 63 (see figure 1)s are connected on the jib 15 through these Connection Blocks 67, constitute the boom of concrete mixer jointly.
In addition; From Fig. 3 and Fig. 4, can find out; For the ease of hinged between first segment arm the joint 21 and second joint arm joint 22 with rotate, the end that this two joints arm joint is hinged is crooked toward each other, thereby second driving mechanism 31 and linkage 30 all can be arranged between this two joints arm joint easily.
Fig. 5 has mainly shown the structure between the second joint arm joint the 22 and the 3rd joint arm joint 23.Fig. 6 is the lateral view of Fig. 5.
First segment arm the joint 21 and second joint arm joint 22 all is to be on the same longitudinal surface P basically, but 23 differences of the 3rd joint arm joint.Can clearly be seen that from Fig. 5 the 3rd joint arm joint 23 extends between the first longitudinal surface P and the second longitudinal surface T, promptly the 3rd joint arm joint 23 forms the shape of a kind of " bending " on the whole; Prolong its length direction; Mainly can be divided into first 40, mid portion 41 and second portion 42, wherein first 40 is on the first longitudinal surface P, and second portion 42 is on the second longitudinal surface T; 41 of mid portions play transitional function between first and second parts.The first longitudinal surface P and the parallel and spaced apart predetermined distance B of the second longitudinal surface T; This distance B can be carried out appropriate design according to the concrete condition of pump truck; Width of the Breadth Maximum of pump truck, arm joint itself etc. for example; This is understanding easily to those skilled in the art and realizes that the utility model repeats no more to this.
From Fig. 3 and Fig. 5, can find out; On the inner surface 19 of the second joint arm joint 22, be formed with groove 35; This groove is suitable for holding at least in part the 3rd driving mechanism 36; One end of the 3rd driving mechanism 36 is hinged on the second joint arm joint 22, and the other end makes it to fold or launch with respect to the second joint arm joint 22 through second connecting rod mechanism 39 drivings the 3rd joint arm joint 23.In this way, can reduce the distance between this two joints arm joint as much as possible, make structure compact more.
In addition, save 22 similarly with first segment arm joint 21 and the second joint arm, the second joint arm joint the 22 and the 3rd joint arm saves the 23 equally preferably bendings toward each other of end that are hinged, so that the 3rd driving mechanism 36 and second connecting rod mechanism 39 can be arranged between the two easily.
Fig. 7 has mainly shown the structure between the 3rd joint arm joint the 23 and the 4th joint arm joint 24.Fig. 8 is the lateral view of Fig. 7.
Save 22 similar with the second joint arm; Be formed with groove (not shown) equally on the inner surface of the second portion 42 of the 3rd joint arm joint 23; To hold 4 wheel driven actuation mechanism 43 at least in part; One end of this 4 wheel driven actuation mechanism 43 is hinged on the second portion 42 of the 3rd joint arm joint 23, and the other end is through the folding each other or expansion of this two joints arm joint of third connecting rod mechanism 47 drivings.Other structures of this two joints arm joint 23 and 24 and above-mentioned basic identical repeat no more.
Fig. 9 has mainly shown the structure between the 4th joint arm joint the 24 and the 5th joint arm joint 25.Figure 10 is the lateral view of Fig. 9.
Similar with said structure, an end of the 5th driving mechanism 53 is hinged on the 4th and saves on the arm joint 24, and the other end drives the 4th joint arm through quadric chain 54 and saves the 25 folding each other or expansion of the 24 and the 5th joint arm joint.In addition, the end that this two joints arm joint is hinged is crooked toward each other, holds the 5th driving mechanism 53 and quadric chain 54 so that be formed with the space.Other structures and above-mentioned similar repeat no more.
Figure 11 has mainly shown the structure between the 5th joint arm joint the 25, the 6th joint arm joint the 26 and the 7th joint arm joint 27.Figure 12 is the lateral view of Figure 11.
Like Figure 11 and shown in Figure 12, different with five joint arm joints of front, the 6th joint arm joint 26 is preferably folding towards second direction V2 with respect to the 5th joint arm joint 25, makes the external surface 20 of its external surface 20 and the 5th joint arm joint 25 face with each other.Simultaneously, the 7th joint arm joint the 27 and the 6th joint arm joint 26 is linearly arranged.This arrangement can improve the flexibility of transmission and concrete transmission.
In addition, as can be seen from Figure 11, on the inner surface 19 of the 6th joint arm joint 26, be formed with groove 60, be used to drive the 6th joint arm joint the 26 and the 7th joint arm joint 27 the 7th driving mechanisms (not shown) folding each other and that launch and can be contained in this groove 60.The 6th joint arm joint 26 can be folding with respect to said the 7th joint arm joint 27 with said first direction V1, and the anglec of rotation between the 6th joint arm joint the 26 and the 7th joint arm joint 27 can be the 0-90 degree.The anglec of rotation between the 5th joint arm joint the 25 and the 6th joint arm joint 26 can be the 0-210 degree.
Every joint arm joint 21-27 is by metal material manufacturing, for example steel, aluminium alloys etc.Preferably, have at least at least a portion of some arm joints or arm joint can significantly reduce the overall weight of jib thus by the carbon fibre material manufacturing.
As an example, the length of every joint arm joint can be between 13 meters to 15 meters, but the 6th joint and the 7th joint arm joint 26 and 27 length separately can be between 6 meters to 7 meters.
As an example, the length L of concrete mixer is approximately 18 meters, and height H is approximately 4 meters, and width is approximately 2.5 meters.
With reference to Figure 13 and Figure 14, wherein jib 15 expands into extreme length, and promptly every joint arm joint all roughly is on the same straight line.During from deployed condition to folded state; Fold on the 5th joint arm joint 25 with counter clockwise direction V2 on the 7th joint arm joint the 27 and the 6th joint arm joint 26; The 5th joint arm joint 25 V1 in a clockwise direction folds on the 4th joint arm joint 24; Therefore, the 4th joint, the 5th joint and the 6th joint arm joint 24-26 are folding with Z-shaped mode.Next; The 4th joint arm joint 24 V1 in a clockwise direction folds on the 3rd joint arm joint 23; The 3rd joint arm joint 23 folds on the second joint arm joint 22 in a clockwise direction; The second joint arm joint 22 folds on the first segment arm joint 21 in a clockwise direction, and therefore, five joint arm joint 21-25 are folding with the mode of R shape for first segment to the.Through the folding mode of this uniqueness, and combine the 3rd joint arm to save 23 warp architecture, under the situation that does not increase pump truck overall dimensions under the folded state, can when jib launches, improve concrete fed distance as much as possible.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned embodiment; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technical scheme of the utility model, these simple variant all belong to the protection domain of the utility model.
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various embodiment of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.
Claims (11)
1. the jib of a concrete mixer, this jib has folded state and deployed condition, it is characterized in that; Said jib comprises at least six hinged successively joint arm joints; At said folded state, the first segment and the second joint arm joint are positioned on first longitudinal surface, and the extremely minor details arm joint of the 4th joint is positioned on second longitudinal surface; First longitudinal surface and second longitudinal surface are parallel to each other and are spaced apart; The 3rd joint arm joint extends between first longitudinal surface and second longitudinal surface, and first segment to the five joint arm joints are folding towards first direction, and the 6th joint arm joint court second direction opposite with first direction folds on the 5th joint arm joint.
2. the jib of concrete mixer according to claim 1 is characterized in that, said jib comprises seven joint arm joints, and at said folded state, said the 6th joint and the 7th joint arm joint are linearly arranged and all folded on the 5th joint arm joint.
3. the jib of concrete mixer according to claim 1 and 2; It is characterized in that; Said the 3rd joint arm joint comprises first, mid portion and second portion; Said first is positioned on said first longitudinal surface, and said second portion is positioned on said second longitudinal surface, and said mid portion is between said first and second portion.
4. the jib of concrete mixer according to claim 3 is characterized in that, in first segment to the five joint arm joints, the angulation scope is the 0-180 degree between the adjacent two joint arm joints.
5. the jib of concrete mixer according to claim 3 is characterized in that, the angulation scope is the 0-210 degree between the 5th joint and the 6th joint arm joint.
6. the jib of concrete mixer according to claim 2 is characterized in that, the 6th joint arm is energy-conservation enough folding with respect to said the 7th joint arm joint with said first direction.
7. the jib of concrete mixer according to claim 6 is characterized in that, the angulation scope is the 90-180 degree between the 6th joint and the 7th joint arm joint.
8. the jib of concrete mixer according to claim 1; It is characterized in that; Fold and launch through hydraulic drive mechanism and linkage driving between the adjacent two joint arm joints; Have at least on the joint arm joint in these adjacent two joint arm joints and have groove, this groove is suitable for holding at least in part this hydraulic drive mechanism.
9. the jib of concrete mixer according to claim 8 is characterized in that, the crooked toward each other space that is suitable for arranging said linkage with formation of the end that is hinged of these adjacent two joint arm joints.
10. the jib of concrete mixer according to claim 1 is characterized in that, has at least a joint arm joint to comprise at least the first section and second section in the said jib, at said folded state, linearly arranges for said at least the first section and second section.
11. a concrete mixer comprises automobile chassis, turntable and jib, this jib is installed on the chassis through turntable, it is characterized in that, said jib is according to any described jib among the claim 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203858834U CN202248920U (en) | 2011-09-28 | 2011-09-28 | Arm support of concrete pump truck and concrete pump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203858834U CN202248920U (en) | 2011-09-28 | 2011-09-28 | Arm support of concrete pump truck and concrete pump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202248920U true CN202248920U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203858834U Expired - Lifetime CN202248920U (en) | 2011-09-28 | 2011-09-28 | Arm support of concrete pump truck and concrete pump truck |
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| Country | Link |
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| CN (1) | CN202248920U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359278A (en) * | 2011-09-28 | 2012-02-22 | 中联重科股份有限公司 | Arm support of concrete pump truck and concrete pump truck |
| CN111173287A (en) * | 2020-03-10 | 2020-05-19 | 三一汽车制造有限公司 | Boom and working equipment |
| CN111335638A (en) * | 2020-03-10 | 2020-06-26 | 三一汽车制造有限公司 | Boom and working equipment |
| CN112746744A (en) * | 2019-10-30 | 2021-05-04 | 青岛九合重工机械有限公司 | Six-section concrete pump truck arm support device |
-
2011
- 2011-09-28 CN CN2011203858834U patent/CN202248920U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359278A (en) * | 2011-09-28 | 2012-02-22 | 中联重科股份有限公司 | Arm support of concrete pump truck and concrete pump truck |
| CN102359278B (en) * | 2011-09-28 | 2013-08-21 | 中联重科股份有限公司 | Arm support of concrete pump truck and concrete pump truck |
| CN112746744A (en) * | 2019-10-30 | 2021-05-04 | 青岛九合重工机械有限公司 | Six-section concrete pump truck arm support device |
| CN111173287A (en) * | 2020-03-10 | 2020-05-19 | 三一汽车制造有限公司 | Boom and working equipment |
| CN111335638A (en) * | 2020-03-10 | 2020-06-26 | 三一汽车制造有限公司 | Boom and working equipment |
| CN111173287B (en) * | 2020-03-10 | 2024-05-28 | 三一汽车制造有限公司 | Arm support and operation equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130821 |
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| RGAV | Abandon patent right to avoid regrant |