CN201901544U - Crane and box type lifting arm thereof - Google Patents
Crane and box type lifting arm thereof Download PDFInfo
- Publication number
- CN201901544U CN201901544U CN2010206508236U CN201020650823U CN201901544U CN 201901544 U CN201901544 U CN 201901544U CN 2010206508236 U CN2010206508236 U CN 2010206508236U CN 201020650823 U CN201020650823 U CN 201020650823U CN 201901544 U CN201901544 U CN 201901544U
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- arm
- box
- crane
- axis hole
- crane arm
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Abstract
The utility model discloses a crane and a box-type lifting arm. The box-type lifting arm comprises a basic arm and a plurality of sections of telescopic arms, wherein the tail part of the basic arm is provided with a first shaft hole hinged with a turntable of the crane and a second shaft hole hinged with a telescopic cylinder inside the basic arm. The box-type lifting arm is characterized in that the distance from the circle center of the first shaft hole to the rear end of the basic arm is larger than or equal to the distance from the circle center of the second shaft hole to the rear rend of the basic arm. The tail of the lifting arm is further reduced in size, the overlapping length of all sections of arms and the stroke of the telescopic cylinder are increased to a certain extent, therefore, the stress of the overlapping positions are more reasonable. In addition, the purpose of increasing the fully stretched arm length can be achieved under the condition of the same fully retracted arm length is achieved.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly relates to the box-shaped crane arm of hoisting crane.The utility model also relates to the hoisting crane that is provided with described box-shaped crane arm.
Background technology
Along with developing rapidly of China's economic construction, market increases day by day to the demand of large-tonnage car hosit, full ground hoisting crane.
Crane arm is the actuating unit of hoisting crane lifting weight, the low-alloy high-strength steel plate that the many employings of material have big bending rigidity is abandoned to weld and is made box type construction, its load-carrying capacity is very big, each saves between the arm can slide relative, the effect that the slide block up and down that overlaps by their supports arm and transmits power, the telescopic boom that is sleeved in the basic arm can freely be stretched by hydraulic actuating cylinder control, satisfy the needs of different hoisting heights, basic arm root and turntable are hinged by horizontal bearing pin, can relatively rotate, can change the elevation angle by amplitude oil cylinder.
As the main bearing member of hoisting crane, the weight of crane arm generally accounts for 13～20% of complete machine, and the ratio that goliath accounts for is then bigger.Therefore, the crane arm technology to hoister in large tonnage significantly, performance under the high lifting altitude situation plays fundamental influence.
In recent years, because the user is more and more higher to the requirement of hoisting crane itself, the hoisting crane of superior performance, compact conformation more can obtain user's approval, as the vitals crane arm of hoisting crane on structure design also in continuous development, its version is being continued to optimize, and is compact more for making complete vehicle structure, full semi-girder brachium is longer, stressed more reasonable, break through the increase brachium and only realize by increasing basic brachium, need redesign arm stern construction form.
Please refer to Fig. 1, Fig. 2, Fig. 1 is the tail structure scheme drawing of a kind of representative type box-shaped crane arm in the prior art; Fig. 2 is that the afterbody axle of box-shaped crane arm shown in Fig. 1 is surveyed scheme drawing.
As shown in the figure, the afterbody of this box-shaped crane arm 1 is welded by sheet material, the cylindrical shell of its front side and basic arm 1-1 is connected as a single entity, back upper lateral part outwards protrudes curved, about be respectively equipped with bearing pin axis hole 2 on two hinged supports, be hinged by twin shaft and turntable during assembling, the below of bearing pin axis hole 2 is provided with telescoping cylinder hinge hole 3.
There is following shortcoming in this box-shaped crane arm:
At first, owing to protrude after the arm Caudad, cause arm stern construction size bigger, after on the whole the bearing pin axis hole 2 of arm tail leans on, under the certain condition of crane arm length overall, the arm tail spacing of second joint arm 1-2 and basic arm 1-1 is bigger, and second save arm 1-2 and other length that respectively saves arm shorter, the lap of splice between arm and the arm is also corresponding to be reduced, stressed reasonable inadequately.
Secondly, owing to the length direction along crane arm, telescoping cylinder hinge hole 3 is positioned at the front side of bearing pin axis hole 2, the close together of the second joint arm 1-2 and telescoping cylinder hinge hole 3, and telescoping cylinder stroke limiting system causes the full elongation of crane arm shorter.
Moreover crane arm arm tail takes up room bigger, if will increase brachium, only can rely on the length that increases basic arm 1-1 to realize, has limited the increase of other joint arm lengths.
At last, crane arm and turntable are by the form discontinuity that two semiaxis are hinged, and it is dumb to cause hinge to rotate easily, influence the normal revolution and the luffing action of crane arm.
Therefore, how improving the tail structure of box-shaped crane arm, to overcome above-mentioned shortcoming, is the present technical issues that need to address of those skilled in the art.
The utility model content
The purpose of this utility model provides a kind of box-shaped crane arm.The tail dimension of this crane arm further reduces, and each stroke that saves the lap of splice of arm and telescoping cylinder obtains increase to a certain degree, thereby makes the more reasonable stress of overlapping part.In addition, under the identical condition of full reduced arm lengths, can reach the purpose that increases full semi-girder brachium.
Another purpose of the present utility model provides a kind of hoisting crane that above-mentioned box-shaped crane arm is installed.
In order to realize above-mentioned first purpose, the utility model provides a kind of box-shaped crane arm, be used for hoisting crane, comprise basic arm and multi-stage telescopic arms, described basic arm is provided with first axis hole that the turntable with described hoisting crane is hinged at its afterbody, and second axis hole that is hinged with described basic arm in-to-in telescoping cylinder, the distance of the center of circle of described first axis hole to basic arm rear end is more than or equal to the distance of the center of circle to the basic arm rear end of described second axis hole.
Preferably, described basic arm rear end is the aspect perpendicular with its length direction.
Preferably, described basic arm rear end and its end face and bottom surface are mutually the right angle and pass through the chamfering rounding off.
Preferably, the center of circle of described first axis hole and described basic arm rear end overlap with the chamfering center of circle between the end face.
In order to realize above-mentioned second purpose, the utility model also provides a kind of hoisting crane, comprises turntable and the crane arm that is hinged by bearing pin with described turntable, and described crane arm is specially above-mentioned each described box-shaped crane arm.
Preferably, described bearing pin is an axis.
Preferably, described bearing pin is stepped, matches with first axis hole of described box-shaped crane arm afterbody respectively in its two ends, is the necking down position between the two ends.
Preferably, described box-shaped crane arm is provided with axle sleeve at the first axis hole place of its afterbody.
Preferably, described axle sleeve is a three stage structure, and wherein two end sections lay respectively in first axis hole of described box-shaped crane arm afterbody, and interlude connects between first axis hole of described box-shaped crane arm afterbody and with described two end sections.
Preferably, the internal diameter of described axle sleeve interlude is greater than the internal diameter of two end sections.
The box-shaped crane arm that the utility model provides on the basis of existing technology, first axis hole to its afterbody is adjusted with respect to the position of second axis hole, the primary shaft hole circle heart of existing crane arm is to the distance of the basic arm rear end distance less than the center of circle to the basic arm rear end of second axis hole, promptly on the length direction of crane arm, first axis hole is positioned at the rear side of second axis hole, because after the position of first axis hole is leaned on, its afterbody must be made the shape of protruding backward, cause the crane arm tail dimension excessive, after the improvement, the distance of the center of circle of described first axis hole to basic arm rear end is more than or equal to the distance of the center of circle to the basic arm rear end of described second axis hole, promptly on the length direction of crane arm, first axis hole is positioned at the front side of second axis hole or consistency from top to bottom with it, because the position forward direction of first axis hole has been offset certain distance, thereby reduced the size of crane arm afterbody, distance between the second joint arm and basic arm also reduces thereupon, can effectively improve the lap of splice between arm and the arm, make the more reasonable stress that respectively saves arm lap-joint.
In addition, from the total form, first axis hole on the arm tail is offset forward, it is little to take up space when the crane arm luffing, for the layout of other parts provides condition, and with respect to first axis hole, move to edge behind second axis hole, farthest increased the telescoping cylinder stroke.
Total angled from crane arm, above-mentioned improvement can make the arm stern construction compact more, and moulding and complete machine are coordinated more, and basic arm arm tail and cylindrical shell transition are more natural, and the transmission of power is more reasonable during operation; Because the compact form of arm tail is reserved valuable space to cylindrical shell and other joint arm, under the identical condition of full reduced arm lengths, can reach bigger full elongation.
Hoisting crane provided by the utility model is provided with above-mentioned box-shaped crane arm, because above-mentioned box-shaped crane arm has above-mentioned technique effect, the hoisting crane with this box-shaped crane arm also should possess the corresponding techniques effect.
Description of drawings
Fig. 1 is the tail structure scheme drawing of a kind of representative type box-shaped crane arm in the prior art;
Fig. 2 is that the afterbody axle of box-shaped crane arm shown in Fig. 1 is surveyed scheme drawing;
Fig. 3 provides the structural representation of box-shaped crane arm for the utility model;
Fig. 4 is the afterbody axle side scheme drawing of box-shaped crane arm shown in Fig. 3;
Fig. 5 is the length contrast scheme drawing of box-shaped crane arm shown in Figure 3 and box-shaped crane arm shown in Figure 1;
The structural representation that Fig. 6 is hinged by bearing pin and rotating platform of crane for box-shaped crane arm shown in Figure 3.
Among Fig. 1 to Fig. 2:
1. box-shaped crane arm 1-1. basic arm 1-2. second saves arm 2. bearing pin axis holes 3. telescoping cylinder hinge holes
Among Fig. 3 to Fig. 6:
10. the box-shaped crane arm 10-1. basic arm 10-1-1. cylindrical shell 10-1-2. arm tail 10-2. telescopic boom 20. hinged support 20-1. first axis hole 20-2. second axis hole 30. turntables 40. bearing pins 50. axle sleeve 50-1 hold section 50-2. interlude
The specific embodiment
Core of the present utility model is by improving the tail structure of crane arm, make the stroke of the lap of splice that respectively saves arm and telescoping cylinder obtain to a certain degree increase, thereby make the more reasonable stress of overlapping part, in addition, under the identical condition of full reduced arm lengths, can reach the purpose that increases full semi-girder brachium.
Another core of the present utility model provides a kind of hoisting crane that is provided with above-mentioned box-shaped crane arm.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 3, Fig. 4, Fig. 3 provides the structural representation of box-shaped crane arm for the utility model; Fig. 4 is the afterbody axle side scheme drawing of box-shaped crane arm shown in Fig. 3.
In a kind of specific embodiment, the box-shaped crane arm 10 that the utility model provides is made of a joint basic arm 10-1 and four joint telescopic boom 10-2.
Basic arm 10-1 comprises cylindrical shell 10-1-1 and the arm tail 10-1-2 that is fixed together with cylindrical shell, arm tail 10-1-2 adopts sheet material to be welded into box type construction, two hinged supports 20 about having, it between the hinged support indent position, hinged support 20 is provided with the first axis hole 20-1 that is positioned on the same axis, be used for being hinged by bearing pin and rotating platform of crane, the below of the first axis hole 20-1 is the second axis hole 20-2, telescoping cylinder is positioned at the inside of basic arm 10-1, its end and the second axis hole 20-2 are hinged, the shape of arm tail 10-1-2 front side is identical substantially with arm tail shape of the prior art, and improvements just are the shape of the first axis hole 20-1 with respect to position and its rear end of the second axis hole 20-2.
The distance of the center of circle of the first axis hole 20-1 to basic arm rear end is greater than the distance of the center of circle to the basic arm rear end of the second axis hole 20-2, promptly on the length direction of basic arm 10-1, the first axis hole 20-1 is positioned at the front side of the second axis hole 20-2, the space that utilizes first axis hole 20-1 reach and abdicate, the rear end of basic arm 10-1 can be made into and the perpendicular aspect of the length direction of basic arm 10-1, and the end face of this aft end face and arm tail 10-1-2 and bottom surface are mutually the right angle and pass through the chamfering rounding off.
Because the position forward direction of the first axis hole 20-1 has been offset certain distance, under the prerequisite that guarantees structural strength, reduced the size of arm tail 10-1-2 as much as possible, distance between the second joint arm and basic arm 10-1 also reduces thereupon, can effectively improve the lap of splice between arm and the arm, make the more reasonable stress that respectively saves arm lap-joint.
On the one hand, from the total form, the first axis hole 20-1 on the arm tail 10-1-2 is offset forward, it is little to take up space when the crane arm luffing, for the layout of other parts provides condition, and with respect to the first axis hole 20-1, move to edge behind the second axis hole 20-2, farthest increased the telescoping cylinder stroke.
On the other hand, total angled from crane arm, above-mentioned improvement can make the structure of arm tail 10-1-2 compact more, moulding and complete machine are coordinated more, more natural with the cylindrical shell transition, during operation the transmission of power more reasonable, and reserve valuable space for cylindrical shell 10-1-1 and other joint arm, under the identical condition of full reduced arm lengths, can reach bigger full elongation.
Here need to prove, with respect to prior art, the first axis hole 20-1 is after reach, also further upwards be offset certain distance, the center of circle that makes the first axis hole 20-1 overlaps with the chamfering center of circle between the end face with the aft end face of arm tail 10-1-2 substantially, so that be hinged by arm tail position, the 10-1-2 upper right corner and turntable.Since whether the first axis hole 20-1 moves on and on particular location after moving relevant with installation requirement, those skilled in the art can make adjustment as required, just no longer are described in detail here.
Please refer to Fig. 5, Fig. 5 is the length contrast scheme drawing of box-shaped crane arm shown in Figure 3 and box-shaped crane arm shown in Figure 1.
As shown in the figure, if the cylindrical shell length overall when the utility model provides the box-shaped crane arm full reduced is H, cylindrical shell length overall when existing box-shaped crane arm is full reduced is h, under the full reduced length unmodified of crane arm condition, the size of arm tail has reduced Δ h (Δ h=H-h), and the length of basic arm and Ge Jie telescopic boom can increase Δ h respectively.Because crane arm has a joint basic arm and four joint telescopic booms, theoretically, if the full elongation of crane arm is constant, then the lap of splice between arm and the arm will increase Δ h, if the lap of splice between arm and the arm remains unchanged, then full elongation will increase by 5 * Δ h, and under by the full elongation of other means increase crane arm situation near the limit, it is very remarkable that it increases effect.Certainly, in actual applications, the designer can be as required selects in the above-mentioned two kinds strategies with different technologies effect.
Except above-mentioned box-shaped crane arm, the utility model also provides a kind of hoisting crane, and this hoisting crane comprises turntable and the crane arm that is hinged by bearing pin with turntable, and crane arm is a box-shaped crane arm mentioned above, all the other structures please refer to prior art, and this paper repeats no more.
Please refer to Fig. 6, the structural representation that Fig. 6 is hinged by axis and rotating platform of crane for box-shaped crane arm shown in Figure 3.
With box-shaped crane arm 10 and turntable 30 hinged bearing pins 40 is a complete axis, bearing pin 40 is stepped, match with the first axis hole 20-1 of the arm tail 10-1-2 of box-shaped crane arm respectively in its two ends, diameter between the two ends is less, form the necking down position, box-shaped crane arm 10 is provided with axle sleeve 50 at the first axis hole place of its arm tail 10-1-2.
Axle sleeve 50 is a three stage structure, wherein two end section 50-1 lay respectively among two the first axis hole 20-1 of arm tail 10-1-2, interlude 50-2 is docking together between two axis holes and with two end section 50-1, and the internal diameter of two end section 50-1 is less than the internal diameter of interlude 50-2.
In assembling and dismounting, play the transition directional tagging by the setting of different half bush wall thickness, the difference and the stepped shaft of diameter of axle size, box-shaped crane arm 10 adopts the axis form with the bearing pin 40 of turntable 30, box-shaped crane arm 10 rotates more flexible around hinge, two hinges are stressed evenly, strengthened the ability of opposing lateral loading.
Certainly, the structure of axle sleeve 50 is not limited to aforesaid way, axle sleeve 50 can also be changed into therefrom separated two sectional type structure, and strengthens by alternate manner, can realize the utility model purpose equally.
Above-mentioned hoisting crane specifically can be car hosit or full ground hoisting crane.
More than hoisting crane provided by the utility model and box-shaped crane arm thereof are described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. box-shaped crane arm, be used for hoisting crane, comprise basic arm and multi-stage telescopic arms, described basic arm is provided with first axis hole that the turntable with described hoisting crane is hinged at its afterbody, and second axis hole that is hinged with described basic arm in-to-in telescoping cylinder, it is characterized in that the distance of the center of circle of described first axis hole to basic arm rear end is more than or equal to the distance of the center of circle to the basic arm rear end of described second axis hole.
2. box-shaped crane arm according to claim 1 is characterized in that, described basic arm rear end is the aspect perpendicular with its length direction.
3. box-shaped crane arm according to claim 2 is characterized in that, described basic arm rear end and its end face and bottom surface are mutually the right angle and pass through the chamfering rounding off.
4. box-shaped crane arm according to claim 3 is characterized in that, the center of circle of described first axis hole and described basic arm rear end overlap with the chamfering center of circle between the end face.
5. hoisting crane, comprise turntable and with described turntable by the crane arm that bearing pin is hinged, it is characterized in that described crane arm is specially aforesaid right requirement 1 to 4 each described box-shaped crane arm.
6. hoisting crane according to claim 5 is characterized in that, described bearing pin is an axis.
7. hoisting crane according to claim 6 is characterized in that described bearing pin is stepped, matches with first axis hole of described box-shaped crane arm afterbody respectively in its two ends, is the necking down position between the two ends.
8. hoisting crane according to claim 5 is characterized in that, described box-shaped crane arm is provided with axle sleeve at the first axis hole place of its afterbody.
9. hoisting crane according to claim 8, it is characterized in that, described axle sleeve is a three stage structure, and wherein two end sections lay respectively in first axis hole of described box-shaped crane arm afterbody, and interlude connects between first axis hole of described box-shaped crane arm afterbody and with described two end sections.
10. hoisting crane according to claim 9 is characterized in that, the internal diameter of described axle sleeve interlude is greater than the internal diameter of two end sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206508236U CN201901544U (en) | 2010-12-09 | 2010-12-09 | Crane and box type lifting arm thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206508236U CN201901544U (en) | 2010-12-09 | 2010-12-09 | Crane and box type lifting arm thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201901544U true CN201901544U (en) | 2011-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206508236U Expired - Lifetime CN201901544U (en) | 2010-12-09 | 2010-12-09 | Crane and box type lifting arm thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201901544U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964323A (en) * | 2014-05-28 | 2014-08-06 | 徐州重型机械有限公司 | Setting method for stretchable-retractable type crane arm, stretchable-retractable type crane arm and crane |
| CN104192726A (en) * | 2014-08-30 | 2014-12-10 | 长治清华机械厂 | Ultralow large-tonnage lorry-mounted crane |
| CN109544513A (en) * | 2018-10-24 | 2019-03-29 | 广州霞光技研有限公司 | A kind of steel pipe end surface defect extraction knowledge method for distinguishing |
-
2010
- 2010-12-09 CN CN2010206508236U patent/CN201901544U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964323A (en) * | 2014-05-28 | 2014-08-06 | 徐州重型机械有限公司 | Setting method for stretchable-retractable type crane arm, stretchable-retractable type crane arm and crane |
| CN103964323B (en) * | 2014-05-28 | 2015-12-30 | 徐州重型机械有限公司 | A kind of method to set up of telescopic boom, telescopic boom and hoisting crane |
| CN104192726A (en) * | 2014-08-30 | 2014-12-10 | 长治清华机械厂 | Ultralow large-tonnage lorry-mounted crane |
| CN104192726B (en) * | 2014-08-30 | 2016-05-04 | 长治清华机械厂 | Ultralow heavy tonnage lorry-mounted crane |
| CN109544513A (en) * | 2018-10-24 | 2019-03-29 | 广州霞光技研有限公司 | A kind of steel pipe end surface defect extraction knowledge method for distinguishing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110720 |