CN202967946U - Rear tension adjusting device and crane - Google Patents
Rear tension adjusting device and crane Download PDFInfo
- Publication number
- CN202967946U CN202967946U CN 201220672880 CN201220672880U CN202967946U CN 202967946 U CN202967946 U CN 202967946U CN 201220672880 CN201220672880 CN 201220672880 CN 201220672880 U CN201220672880 U CN 201220672880U CN 202967946 U CN202967946 U CN 202967946U
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- control apparatus
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- 230000001105 regulatory effect Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000008859 change Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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Abstract
The utility model provides a back tension adjusting device and hoist. The rear tension adjusting device includes: a guide member; the sliding part is connected with the guide part in a sliding manner and comprises a body and a rear tensioning device connecting part connected with the body; and the first end of the adjusting oil cylinder is connected with the guide piece, and the second end of the adjusting oil cylinder is connected with the body of the sliding piece. The utility model discloses a sliding motion of slider in the guide adjusts the arm-tie point in the position of jib loading boom afterbody, and then changes back tensioning device, surpasses the geometry of the triangle-shaped that mast and jib loading boom constitute to tensioning device's pretightning force after can adjusting in real time has kept the uniformity of arm-tie pretightning force, has realized taking the controllability of the jib loading boom structural rigidity of super-lift device, has promoted the overall stability and the jack-up performance of jib loading boom.
Description
Technical field
The utility model relates to hoisting crane, more specifically, relates to a kind of rear tension control apparatus and hoisting crane.
Background technology
Fig. 1 is the structural representation of hoisting crane of the prior art and super lifting device thereof, and Fig. 2 is the mechanics principle figure of Fig. 1.To shown in Figure 2, hoisting crane comprises crane arm 60 and has surpassed mast 70, wherein, surpassed mast 70 and be pivotably mounted on crane arm 60 as Fig. 1.Hoisting crane also comprises front take-up device 100, especially, this front take-up device 100 comprises steel rope, and an end of steel rope is connected with the ratchet elevator that has surpassed mast 70, after the other end is walked around the movable pulley 110 that is arranged on crane arm 60 ends, and surpassed mast 70 and captiveed joint.Hoisting crane also comprises rear take-up device 80, an end of rear take-up device 80 with surpassed mast 70 and be connected, the other end is connected with the afterbody of crane arm 60, has arm-tie point of connection 120 between both.
As shown in Figure 2, having surpassed mast 70, steel rope and rear take-up device 80 respectively has two groups, and left and right being arranged symmetrically on crane arm 60, form fixing ditrigon structure respectively, to increase the stability of crane arm 60, improves the lifting performance of hoisting crane.Rear take-up device 80 forms equilibrium of forces with front take-up device 100 (being steel rope).
During steel rope pretension of the prior art, at first crane arm 60 is lifted arm to the initial pretension elevation angle (for example 75 °), then steel rope is carried out pretension until reach initial predetermincd tension, and initially predetermincd tension is fixed value, makes steel rope and rear take-up device 80 all be in initial Pre strained state.Due to the lower end fixed and arranged of rear take-up device 80 afterbody at crane arm 60, so there is following shortcoming in the working process of super lifting device:
Yet after the steel rope pretension, crane arm 60 luffings reach other operating modes when carrying out lifting work, and the elevation angle of the crane arm 60 under different operating modes is different.Under the effect of crane arm 60 deadweights, the predetermincd tension of steel rope will change along with the change at the elevation angle, due to arm-tie point of connection 120 fixed and arranged of rear take-up device 80 afterbody at crane arm 60, make the predetermincd tension of rear take-up device 80 also change thereupon.Therefore, crane arm 60 from initial pretension elevation angle luffing to the process of other operating modes elevations angle, the predetermincd tension of rear take-up device 80 can become excessive or too small under the crane arm 60 different elevations angle, thereby causes rear take-up device 80 tensions or lax, is difficult to reach initial pretension effect.
The utility model content
The utility model aims to provide a kind of rear tension control apparatus and hoisting crane, can become excessive or too small with the predetermincd tension of take-up device after solving in prior art under the crane arm different elevations angle, thereby cause rear take-up device tension or lax, be difficult to reach the problem of initial pretension effect.
For solving the problems of the technologies described above, according to first aspect of the present utility model, provide a kind of rear tension control apparatus, comprising: guide; Sliding part, sliding part and guide sliding block joint, sliding part comprise body and the rear take-up device connecting portion that is connected with body; Regulate oil cylinder, the first end of regulating oil cylinder is connected with guide, and the second end of regulating oil cylinder is connected with the body of sliding part.
Further, guide has the groove of U-shaped, offers the first guide groove on two relative madial walls of groove, and sliding part is slidably arranged in groove, sliding part comprises the first direction protrusion of outwards being given prominence to by body, and the first direction protrusion is arranged in the first guide groove.
Further, offer the second guide groove on the diapire of guide, sliding part comprises the second direction protrusion of outwards being given prominence to by body, and the second direction protrusion is arranged in the second guide groove.
Further, regulating oil cylinder is arranged in groove.
Further, rear tension control apparatus also comprises the first baffle plate and second baffle, and the first baffle plate is connected with the first end of the groove of guide, and second baffle is connected with the second end of the groove of guide, the first end of regulating oil cylinder is connected with the first baffle plate, and the second end of regulating oil cylinder is connected with sliding part.
According to second aspect of the present utility model, a kind of hoisting crane is provided, comprise crane arm, surpassed mast and rear take-up device, having surpassed mast is connected pivotly with crane arm, this hoisting crane also comprises above-mentioned rear tension control apparatus, rear tension control apparatus is connected with crane arm, the first end of rear take-up device with surpassed mast and be connected, the second end of rear take-up device is connected with the rear take-up device connecting portion of the sliding part of rear tension control apparatus.
Further, hoisting crane also comprises transition frame, and the second end of rear take-up device is connected with rear take-up device connecting portion by transition frame.
Further, transition frame comprises first set, the second cover and attaching parts, the first end of first set is connected pivotly with rear take-up device connecting portion, the second end of first set is enclosed within the second the second end that overlaps and by set pin and the second cover and is connected, the first end of attaching parts is connected with the end of rear take-up device, the second end of the second end of attaching parts and the second cover is flexibly connected, and attaching parts can be along the axial rotation of the second cover.
Further, hoisting crane is strained control apparatus after comprising two, strains afterwards the afterbody that control apparatus divides left and right symmetry and independently is arranged on crane arm for two.
The utility model is the slipping motion in guide by sliding part, regulate the arm-tie point of connection in the position of crane arm afterbody, and then change rear take-up device, surpassed the leg-of-mutton geometric configuration that mast and crane arm consist of, thereby can regulate in real time the predetermincd tension of rear take-up device, the conformability that has kept the arm-tie predetermincd tension, realize the controllability with the hoisting arm structure rigidity of super lifting device, promoted resistance to overturning and the lifting performance of crane arm.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 has schematically shown the structural representation of hoisting crane of the prior art and super lifting device thereof;
Fig. 2 has schematically shown the mechanics principle figure of Fig. 1;
Fig. 3 has schematically shown a scheme of installation of the rear tension control apparatus in the utility model;
Fig. 4 has schematically shown another scheme of installation of the rear tension control apparatus in the utility model;
Fig. 5 has schematically shown the scheme of installation of guide and sliding part; And
Fig. 6 has schematically shown the work schematic diagram of rear tension control apparatus.
Reference numeral in figure: 10, guide; 11, the first guide groove; 12, the second guide groove; 13, groove; 20, sliding part; 21, body; 22, rear take-up device connecting portion; 23, the first direction protrusion; 24, the second direction protrusion; 30, regulate oil cylinder; 40, the first baffle plate; 50, second baffle; 60, crane arm; 70, surpassed mast; 80, rear take-up device; 90, transition frame; 91, first set; 92, the second cover; 93, attaching parts; 94, set pin; 100, front take-up device; 110, movable pulley; 120, arm-tie point of connection; 130, rear tension control apparatus.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As first aspect of the present utility model, provide a kind of rear tension control apparatus.To shown in Figure 6, after this, tension control apparatus comprises: guide 10 as Fig. 3; Sliding part 20, sliding part 20 and guide 10 sliding block joints, the rear take-up device connecting portion 22 that sliding part 20 comprises body 21 and is connected with body 21; Regulate oil cylinder 30, the first end of regulating oil cylinder 30 is connected with guide 10, and the second end of regulating oil cylinder 30 is connected with the body 21 of sliding part 20.
After current take-up device pretension, crane arm 60 luffings reach other operating modes when carrying out lifting work, and the elevation angle of the crane arm 60 under different operating modes is different.Under the effect of crane arm 60 deadweights, the predetermincd tension of front take-up device will change along with the change at the elevation angle.After in using the utility model after the tension control apparatus, rear take-up device 80 lower ends are connected with the rear take-up device connecting portion 22 of sliding part 20, thus formation arm-tie point of connection 120.Crane arm 60 from initial pretension elevation angle luffing to the process of other operating modes elevations angle, the predetermincd tension of rear take-up device 80 can become excessive or too small under the crane arm 60 different elevations angle.At this moment, adjusting oil cylinder 30 is elongated or shortened, move up or down thereby drive sliding part 20, even arm-tie point of connection 120 moves up or down, thereby can regulate the degree of tension of the tight device 80 of post-tensioning, prevent its tension or lax, make it remain initial pretension effect.
Preferably, please refer to Fig. 4 to Fig. 6, guide 10 has the groove 13 of U-shaped, offer the first guide groove 11 on two relative madial walls of groove 13, sliding part 20 is slidably arranged in groove 13, sliding part 20 comprises that the first direction protrusion 23, the first direction protrusions 23 of outwards being given prominence to by body 21 are arranged in the first guide groove 11.Two the first direction protrusions 23 are separately positioned on the both sides of body 21, play the effect of guiding.Preferably, offer the second guide groove 12 on the diapire of guide 10, sliding part 20 comprises that the second direction protrusion 24, the second direction protrusions 24 of outwards being given prominence to by body 21 are arranged in the second guide groove 12.Like this, sliding part 20 has and basically is the criss cross cross section, thereby makes the sliding part 20 can both be by correct guiding at the upper and lower, left and right four direction.
Preferably, regulating oil cylinder 30 is arranged in groove 13.Preferably, an end of regulating oil cylinder 30 is connected with the center of sliding part 20, and arranges abreast with groove 13.Like this, regulate the thrust of oil cylinder 30 or the center position that pulling force can be applied to sliding part 20, make sliding part 20 in the process that slides up and down, can avoid the biasing due to thrust or pulling force, cause the first direction protrusion 23, the second direction protrusion 24 to occur crooked and problem obstruction sliding part proper motion.
Preferably, rear tension control apparatus also comprises the first baffle plate 40 and second baffle 50, the first baffle plate 40 is connected with the first end of the groove 13 of guide 10, second baffle 50 is connected with the second end of the groove 13 of guide 10, the first end of regulating oil cylinder 30 is connected with the first baffle plate 40, and the second end of regulating oil cylinder 30 is connected with sliding part 20.The first baffle plate 40 and second baffle 50 gears are at the two ends of groove 13, thereby shutoff on groove 13 is aspect horizontal is got up.On the one hand, the first baffle plate 40 can be used as the fixed mounting of regulating oil cylinder 30, and on the other hand, second baffle 50 can also play the effect of the range of movement of limit slippage part 20.
As second aspect of the present utility model, please refer to Fig. 3 to Fig. 6, a kind of hoisting crane is provided, comprise crane arm 60, surpassed mast and rear take-up device 80, having surpassed mast is connected pivotly with crane arm 60, this hoisting crane also comprises above-mentioned rear tension control apparatus 130, rear tension control apparatus 130 is connected with crane arm 60, the first end of rear take-up device 80 with surpassed mast and be connected, the second end of rear take-up device 80 is connected with the rear take-up device connecting portion 22 of the sliding part 20 of rear tension control apparatus.
Please refer to Fig. 3 to Fig. 6, hoisting crane also comprises transition frame 90, and the second end of rear take-up device 80 is connected with rear take-up device connecting portion 22 by transition frame 90.Please refer to Fig. 6, when regulating oil cylinder 30 elongation, sliding part 20 and transition frame 90 by the position movement shown in the solid line on right side to the position shown in the dotted line in left side; When regulating oil cylinder 30 and shrink, sliding part 20 and transition frame 90 by the position movement shown in the dotted line in left side to the position shown in the solid line on right side, thereby it is corresponding mobile that arm-tie point of connection 120 is occured, and played the purpose of regulating the degree of tension of rear take-up device 80.
Preferably, please refer to Fig. 6, transition frame 90 comprises first set 91, the second cover 92 and attaching parts 93, the first end of first set 91 is connected pivotly with rear take-up device connecting portion 22, the second end of first set 91 is enclosed within second cover the second end of 92 and overlaps 92 by set pin 94 and second and is connected, the first end of attaching parts 93 is connected with the end of rear take-up device 80, and the second end of the second end of attaching parts 93 and the second cover 92 is flexibly connected, and attaching parts 93 can be along the axial rotation of the second cover 92.Transition frame 90 plays the effect of universal-joint, can make the rotation that produces any direction between the tight device 80 of post-tensioning and sliding part 20, prevents from producing between rear take-up device 80 and sliding part 20 effect of torsion.
In addition, surpassed mast, front take-up device and rear take-up device 80 in prior art and be left and right and be arranged in symmetrically on crane arm 60, it is symmetrical making crane arm 60 rigidity in the convolution plane.But, carry in process hanging of actual condition, there is the effect of lateral loading in the arm head of crane arm 60, make crane arm 60 produce side sway, due to arm-tie point of connection 120 fixed and arranged of rear take-up device 80 afterbody at crane arm 60, lateral loading can make the stressed unequal of the left and right rear take-up device 80 that is arranged symmetrically with, long-armed lateral stability of hanging crane arm 60 when carrying in having reduced.
For this reason, preferably, the hoisting crane in the utility model comprises strains the afterbody that 130, two of control apparatuss are strained afterwards 130 minutes left and right symmetries of control apparatus and independently are arranged on crane arm 60 after two.Like this, when the arm head of crane arm 60 produces side sway due to the effect of lateral loading, can regulate respectively the amount of movement (namely realizing the asynchronous movement of both sides sliding part 20) of the sliding part 20 in the rear tension control apparatus of arranged on left and right sides, to regulate respectively the position of arm-tie point of connection 120 on crane arm 60 of arranged on left and right sides, thereby changed the predetermincd tension of the rear take-up device of arranged on left and right sides, and then can carry out real-time adjusting to the side sway of crane arm 60.
The utility model is the slipping motion in guide by sliding part, regulate the arm-tie point of connection in the position of crane arm afterbody, and then change rear take-up device, surpassed the leg-of-mutton geometric configuration that mast and crane arm consist of, thereby can regulate in real time the predetermincd tension of rear take-up device, the conformability that has kept the arm-tie predetermincd tension, realize the controllability with the hoisting arm structure rigidity of super lifting device, promoted resistance to overturning and the lifting performance of crane arm.
The above is only preferred embodiment of the present utility model, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. strain control apparatus after one kind, it is characterized in that, comprising:
Guide (10);
Sliding part (20), described sliding part (20) and described guide (10) sliding block joint, described sliding part (20) comprises body (21) and the rear take-up device connecting portion (22) that is connected with described body (21);
Regulate oil cylinder (30), the first end of described adjusting oil cylinder (30) is connected with described guide (10), and the second end of described adjusting oil cylinder (30) is connected with the body (21) of described sliding part (20).
2. rear tension control apparatus according to claim 1, it is characterized in that, described guide (10) has the groove (13) of U-shaped, offer the first guide groove (11) on two relative madial walls of described groove (13), described sliding part (20) is slidably arranged in described groove (13), described sliding part (20) comprises the first direction protrusion (23) of outwards being given prominence to by described body (21), and described the first direction protrusion (23) is arranged in described the first guide groove (11).
3. rear tension control apparatus according to claim 2, it is characterized in that, offer the second guide groove (12) on the diapire of described guide (10), described sliding part (20) comprises the second direction protrusion (24) of outwards being given prominence to by described body (21), and described the second direction protrusion (24) is arranged in described the second guide groove (12).
4. rear tension control apparatus according to claim 2, is characterized in that, described adjusting oil cylinder (30) is arranged in described groove (13).
5. rear tension control apparatus according to claim 2, it is characterized in that, described rear tension control apparatus also comprises the first baffle plate (40) and second baffle (50), described the first baffle plate (40) is connected with the first end of the groove (13) of described guide (10), described second baffle (50) is connected with the second end of the groove (13) of described guide (10), the first end of described adjusting oil cylinder (30) is connected with described the first baffle plate (40), the second end of described adjusting oil cylinder (30) is connected with described sliding part (20).
6. hoisting crane, comprise crane arm (60), mast and rear take-up device (80) have been surpassed, the described mast that surpassed is connected pivotly with described crane arm (60), it is characterized in that, described hoisting crane also comprises the described rear tension control apparatus of any one in claim 1 to 5, described rear tension control apparatus is connected with described crane arm (60), the first end of described rear take-up device (80) is connected with the described mast that surpassed, the second end of described rear take-up device (80) is connected with the rear take-up device connecting portion (22) of the sliding part (20) of described rear tension control apparatus.
7. hoisting crane according to claim 6, it is characterized in that, described hoisting crane also comprises transition frame (90), and the second end of described rear take-up device (80) is connected with described rear take-up device connecting portion (22) by described transition frame (90).
8. hoisting crane according to claim 7, it is characterized in that, described transition frame (90) comprises first set (91), the second cover (92) and attaching parts (93), the first end of described first set (91) is connected pivotly with described rear take-up device connecting portion (22), the second end of described first set (91) is enclosed within the second end of described the second cover (92) and overlaps (92) by set pin (94) and described second and is connected, the first end of described attaching parts (93) is connected with the end of described rear take-up device (80), the second end of the second end of described attaching parts (93) and described the second cover (92) is flexibly connected, and described attaching parts (93) can be along the axial rotation of described the second cover (92).
9. hoisting crane according to claim 6, is characterized in that, described hoisting crane comprises two described rear tension control apparatuss, strains afterwards the afterbody that control apparatus divides left and right symmetry and independently is arranged on described crane arm (60) for described two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672880 CN202967946U (en) | 2012-12-07 | 2012-12-07 | Rear tension adjusting device and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672880 CN202967946U (en) | 2012-12-07 | 2012-12-07 | Rear tension adjusting device and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202967946U true CN202967946U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220672880 Expired - Lifetime CN202967946U (en) | 2012-12-07 | 2012-12-07 | Rear tension adjusting device and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202967946U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942127A (en) * | 2012-12-07 | 2013-02-27 | 中联重科股份有限公司 | Rear tension adjusting device and crane |
| CN106586849A (en) * | 2016-12-27 | 2017-04-26 | 中国冶集团有限公司 | Automatic adjusting device and method of crane auxiliary bracing |
-
2012
- 2012-12-07 CN CN 201220672880 patent/CN202967946U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942127A (en) * | 2012-12-07 | 2013-02-27 | 中联重科股份有限公司 | Rear tension adjusting device and crane |
| CN106586849A (en) * | 2016-12-27 | 2017-04-26 | 中国冶集团有限公司 | Automatic adjusting device and method of crane auxiliary bracing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20150429 |