CN115535890A - Cantilever crane system and crawler crane - Google Patents
Cantilever crane system and crawler crane Download PDFInfo
- Publication number
- CN115535890A CN115535890A CN202211324631.XA CN202211324631A CN115535890A CN 115535890 A CN115535890 A CN 115535890A CN 202211324631 A CN202211324631 A CN 202211324631A CN 115535890 A CN115535890 A CN 115535890A
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- CN
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- Prior art keywords
- propeller strut
- force limiter
- plate
- rotary table
- hinged
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a boom system and a crawler crane, wherein a crane body is connected with the boom system, and the boom system comprises: the device comprises a rotary table, a force limiter and a propeller strut; the propeller strut is connected to the rotary table; the force limiter is connected to the bottom of the propeller strut, one end of the force limiter is connected with the propeller strut, and the other end of the force limiter is connected with the rotary table; the head of the propeller strut is connected with a propeller strut pulley block, the propeller strut pulley block is connected with an amplitude variation pulley block through an amplitude variation steel wire rope, the amplitude variation pulley block is connected with one end of a first single-pulling plate through a pull rope, the other end of the first single-pulling plate is connected with the head of a main arm through a pin shaft and is connected with a hinge point to pull up the main arm, the tail of the main arm is hinged with a rotary table, a lifting steel wire rope starts from a main lifting winch, and the lifting steel wire rope lifts a heavy object through a main arm fixed pulley and a main arm head pulley. The force limiter is arranged at the root of the propeller strut, so that the interference of factors such as wind power, the vibration of a steel wire rope and the like on the force limiter in the working process of the crane is reduced, the interference of external environmental factors on data is reduced, and the force value measuring and calculating precision is high.
Description
Technical Field
The invention discloses an arm support system and a crawler crane, and relates to the technical field of crawler cranes.
Background
The crawler crane is a truss type arm frame structure crane provided with a traveling device, a hoisting device, an amplitude variation device and a slewing device on a traveling crawler chassis, wherein the hoisting device mainly comprises a main arm, an auxiliary arm, a tower arm and the like, and the amplitude variation device refers to an amplitude variation pulley block and the like which are arranged on a propeller strut of a rotary table and connected between the propeller strut and the main arm through an amplitude variation steel wire rope. In order to ensure the safe operation of the crawler crane, a tension limiter is arranged between a main arm and a propeller strut to extract the stress condition of the arm support, and stress data are extracted and transmitted to a host panel;
in the prior art, one end of the tension limiter is connected with the arm head, the other end of the tension limiter is connected with the amplitude-variable pulley block through a pulling plate (zipper), the pulling plate (zipper) belongs to a flexible body, so that the deflection phenomenon can be generated, factors such as wind load, vibration and the like in the whole machine operation process are considered, the precision of the tension limiter can be influenced, the actual measurement of the pulling plate (zipper) force error is large, and the safety of the whole machine operation is reduced.
The pulling force limit device is connected with the arm head through the pulling plate (zipper), the position of the pulling force limit device is close to the arm head, the arm head is higher in the working process, the pulling force limit device is not favorable for maintenance and protection, the waterproof and moistureproof performance is poor, the data of the pulling force limit device is transmitted through a cable, the pulling force limit device is far away from a cab, a cable channel is longer, the pulling force limit device is not easy to tie up, the attractiveness is poor, and the cost is high.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides the arm support system and the crawler crane, which can accurately extract the stress data of the arm support pulling plate system and improve the working reliability.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a boom system, comprising: the device comprises a rotary table, a force limiter and a propeller strut; the propeller strut is connected to the rotary table; the force limiter is connected to the bottom of the propeller strut, one end of the force limiter is connected with the propeller strut, and the other end of the force limiter is connected with the rotary table; the head of the propeller strut is connected with a propeller strut pulley block, the propeller strut pulley block is connected with an amplitude variation pulley block through an amplitude variation steel wire rope, the amplitude variation pulley block is connected with one end of a first single-pulling plate through a guy cable, the other end of the first single-pulling plate is connected with the head of a main arm through a pin shaft to be connected with a hinge point to pull up the main arm, the tail of the main arm is hinged to a rotary table, a lifting steel wire rope starts from a main lifting winch, and the lifting steel wire rope is used for lifting a heavy object through a main arm fixed pulley and a main arm head pulley.
Further, the propeller strut includes: a propeller strut rear pull plate and a propeller strut front stay bar; the head parts of the rear pulling plate and the front brace rod of the propeller strut are connected through a pin shaft, and the head part of the front brace rod of the propeller strut penetrates through a pulley shaft to be connected with a propeller strut pulley block.
Furthermore, the lower end of the rear pull plate of the propeller strut is connected with the upper end of the adapter plate, the lower end of the adapter plate is respectively connected with the second single pull plate and the first double pull plate, the other end of the second single pull plate is hinged to the rotary table, and the first double pull plate is sequentially hinged with the relay limiter and the second double pull plate and is finally hinged to the rotary table.
Furthermore, the straight line where the second single pulling plate and the first double pulling plate are located is symmetrical to the straight line where the rear pulling plate of the propeller strut is located.
Furthermore, the included angle between the second single pulling plate and the first double pulling plate is 0-120 degrees.
Furthermore, the lower end of the rear pulling plate of the propeller strut is connected with the upper end of the adapter plate, the lower end of the adapter plate is hinged with one end of a second single pulling plate and one end of a force limiter respectively, the second single pulling plate and the force limiter are arranged in parallel, the other ends of the second single pulling plate and the force limiter are hinged with one end of another adapter plate respectively, the other end of the second single pulling plate and the other end of the force limiter are hinged with a short pulling plate, and the short pulling plate is hinged with the rotary table.
Furthermore, the second single pulling plate is replaced by a force limiter.
A crawler crane comprises a crane body, wherein the crane body is connected with the arm support system, and a rotary table is connected to the crane body.
Has the advantages that: the force limiter is arranged at the root of the propeller strut, so that the interference of factors such as wind power, self vibration of a steel wire rope and the like on the force limiter in the working process of the crane can be effectively reduced, the interference of external environmental factors on data is reduced, and the force value measuring and calculating accuracy is high.
Because the force limiter is arranged at the root of the propeller strut, the pulling force borne by the rear pulling plate of the propeller strut is borne by the force limiter and the single pulling plate together, the stress is small, the force limiter with small specification can be selected, and the cost is saved.
According to the invention, the force limiter is placed at the root of the propeller strut, and the cable can be directly connected with the force limiter by the cab electrical cabinet by utilizing the space of the rotary table, so that the cable is prevented from extending from the cab electrical cabinet to the arm head, the use length of the cable is effectively reduced, the space utilization rate of the rotary table is improved, the layout of the cable is optimized, the cost is reduced, the attractiveness is enhanced, and the maintenance convenience is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a cable force;
FIG. 3 is a schematic view of the force applied to the herringbone frame;
FIG. 4 is a force limiter force diagram;
FIG. 5 is a schematic view of a second force limiter arrangement;
FIG. 6 is a schematic view of a third force limiter arrangement;
fig. 7 is a force diagram of the second and third force limiter.
Detailed Description
The following describes the embodiments in further detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
One embodiment as shown in fig. 1:
the first embodiment is as follows:
a crawler crane comprises a crane body, wherein the crane body is connected with the arm support system, and a rotary table 1 is connected to the crane body.
The boom system comprises: the device comprises a rotary table 1, a force limiter 9 and a propeller strut; the propeller strut is connected to the rotary table 1; the force limiter 9 is connected to the bottom of the propeller strut, one end of the force limiter 9 is connected with the propeller strut, and the other end of the force limiter 9 is connected with the rotary table 1; the head of the propeller strut 4 is connected with a propeller strut pulley block 5, the propeller strut pulley block 5 is connected with an amplitude variation pulley block 7 through an amplitude variation steel wire rope 6, the amplitude variation pulley block 7 is connected with one end of a first single-pulling plate 10 through a guy cable 8, the other end of the first single-pulling plate 10 is connected with the head of a main arm 11 through a pin shaft and connected with a hinge point to pull up the main arm, the tail of the main arm 11 is hinged to a rotary table 1, a lifting steel wire rope starts from a main lifting winch 18, and the lifting steel wire rope is used for lifting a heavy object 12 through a main arm fixed pulley and a main arm head pulley.
The propeller strut 4 includes: the propeller strut assembly comprises a propeller strut rear pull plate 3 and a propeller strut front stay bar 4, the heads of the propeller strut rear pull plate 3 and the propeller strut front stay bar 4 are connected through a pin shaft, and the head of the propeller strut front stay bar 4 penetrates through a pulley shaft to be connected with a propeller strut pulley block 5.
The lower end of the propeller strut rear pulling plate 3 is connected with the upper end of the adapter plate 14, the lower end of the adapter plate 14 is respectively connected with the second single pulling plate 13 and the first double pulling plate 15, the other end of the second single pulling plate 13 is hinged to the rotary table 1, and the first double pulling plate 15 is sequentially hinged with the force limiter 9 and the second double pulling plate 16 and is finally hinged to the rotary table 1.
The straight line of the second single pulling plate 13 and the first double pulling plate 15 is symmetrical to the straight line of the propeller strut rear pulling plate 3.
The included angle between the second single pulling plate 13 and the first double pulling plate 15 is 0-120 degrees.
As shown in fig. 2 to 4, the data acquisition mode of the force limiter 9 is as follows:
the gravity of the weight can be resolved through a force system to obtain component force along the direction of the inhaul cable, and inhaul cable force stress caused by load in the amplitude-variable plane is solved;
moment is taken from the arm support hinge point A, and the stress of the first single pulling plate 10 can be obtained:
F g ＝(GLcosθ b +0.5mgLcosθ)/(Lsinθ g )
wherein theta is the elevation angle of the arm support; mg is the dead weight of the arm support; g is the gravity of the weight; l is the length of the arm support; f g A pull plate force of the first single pull plate; theta b Is the angle theta between the ground and the axis of the arm support g The included angle between the pulling plate force and the arm support axis is adopted;
the force analysis is carried out on the head pulley block of the herringbone frame, and the known pull force of the stay rope is the same as the pull plate force of the first single pull plate, so that the pull force can be obtained according to a formula F 1 ＝F n sinθ 2 +F g sinθ 1 ，F n cosθ 2 ＝F g cosθ 1 Eliminating F n Obtaining the tension F of the rear pulling plate of the propeller strut 1 (the gravity of the propeller strut back plate can be neglected),
wherein, F n The supporting force of the front supporting rod of the herringbone frame;
F 1 ＝F g (cosθ 1 sinθ 2 /cosθ 2 +sinθ 1 )
an included angle theta between the second single pulling plate 13 and the second double pulling plate 15 can be set according to a formula F 1 ＝2F 2 (cos theta/2) determining the force limiter tension F 2 ，
F 2 ＝F 1 /2(cosθ/2)。
Force limiter pulling force F 2 The size can be converted into data to be transmitted to the cab main panel for display.
The second implementation:
as shown in fig. 5 and 7, in addition to the technical solution of the first embodiment, in the present embodiment: the lower end of the propeller strut rear pull plate 3 is connected with the upper end of the adapter plate 14, the lower end of the adapter plate 14 is hinged with one end of a second single pull plate 13 and one end of a force limiter 9 respectively, the second single pull plate 13 and the force limiter 9 are arranged in parallel, the other ends of the second single pull plate 13 and the force limiter 9 are hinged with one end of another adapter plate 14 respectively, the other end of the second single pull plate is hinged with a short pull plate 19, and the short pull plate 19 is hinged with the rotary table.
Obtaining the tension F of the rear pulling plate of the propeller strut 1 Can be according to formula F 1 ＝2F 2 The pulling force F of the force limiter can be obtained 2 ，
F 2 ＝F 1 /2。
Force limiter pulling force F 2 The size can be converted into data to be transmitted to the main panel of the cab for display
Example three:
in addition to the technical solutions of the second embodiment, an embodiment shown in fig. 6 and 7 includes: in the third embodiment, the second single pulling plate 13 in the second embodiment is replaced by a force limiter 9.
Obtaining the tension F of the rear pulling plate of the propeller strut 1 Can be according to formula F 1 ＝2F 2 To obtain the power limitTensile force F of device 2 ，
F 2 ＝F 1 /2。
Force limiter pulling force F 2 The size can be converted into data to be transmitted to the cab main panel for display.
The force limiter is arranged at the root of the propeller strut, so that the interference of factors such as wind power, self vibration of a steel wire rope and the like on the force limiter in the working process of the crane can be effectively reduced, the interference of external environmental factors on data is reduced, and the force value measuring and calculating accuracy is high.
The invention has the advantages that the force limiter is arranged at the root part of the propeller strut, the tension borne by the rear pull plate of the propeller strut is measured, the tension borne by the rear pull plate of the propeller strut is borne by the force limiter and the single pull plate together, the stress is small, the force limiter with small specification can be selected, and the cost is saved.
According to the invention, the force limiter is placed at the root of the propeller strut, so that the cable space winding is avoided when the upper part is installed, the space utilization rate of the rotary table is improved, the cable layout is optimized, the cost is reduced, the attractiveness is enhanced, and the maintenance convenience is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A boom system, comprising: the device comprises a rotary table (1), a force limiter (9) and a propeller strut; the propeller strut is connected to the rotary table (1); the force limiter (9) is connected to the bottom of the propeller strut, one end of the force limiter (9) is connected with the propeller strut, and the other end of the force limiter (9) is connected with the rotary table (1); the head of the propeller strut (4) is connected with a propeller strut pulley block (5), the propeller strut pulley block (5) is connected with an amplitude variation pulley block (7) through an amplitude variation steel wire rope (6), the amplitude variation pulley block (7) is connected with one end of a first single-pulling plate (10) through a guy cable (8), the other end of the first single-pulling plate (10) is connected with the head of a main arm (11) through a pin shaft to be connected with a hinge point to pull up the main arm, the tail of the main arm (11) is hinged to a rotary table (1), a lifting steel wire rope starts from a main lifting winch (18), and the lifting steel wire rope is used for lifting a heavy object (12) through a main arm fixed pulley and a main arm head pulley.
2. Boom system according to claim 1, characterized in that said propeller strut (4) comprises: the V-bracket front support rod assembly comprises a V-bracket rear pull plate (3) and a V-bracket front support rod (4), the head parts of the V-bracket rear pull plate (3) and the V-bracket front support rod (4) are connected through a pin shaft, and the head part of the V-bracket front support rod (4) penetrates through a pulley shaft to be connected with a V-bracket pulley block (5).
3. The boom system according to claim 1, characterized in that the lower end of the rear brace (3) of the propeller strut is connected with the upper end of an adapter plate (14), the lower end of the adapter plate (14) is respectively connected with a second single brace (13) and a first double brace (15), the other end of the second single brace (13) is hinged to the turntable (1), and the first double brace (15) is sequentially hinged to a force limiter (9) and a second double brace (16) and is finally hinged to the turntable (1).
4. The boom system according to claim 3, characterized in that the straight line of the second single pulling plate (13) and the first double pulling plate (15) is symmetrical to the straight line of the propeller strut back pulling plate (3).
5. A boom system according to claim 3, characterized in that the angle between the second single pulling plate (13) and the first double pulling plate (15) is in the range of [ 0-120 ° ].
6. The boom system according to claim 1, characterized in that the lower end of the propeller strut rear pull plate (3) is connected with the upper end of an adapter plate (14), the lower end of the adapter plate (14) is hinged with one end of a second single pull plate (13) and one end of a force limiter (9) respectively, the second single pull plate (13) and the force limiter (9) are arranged in parallel, the other ends of the second single pull plate (13) and the force limiter (9) are hinged with one end of another adapter plate (14) respectively, the other end of the second single pull plate and the other end of the force limiter are hinged with a short pull plate (19), and the short pull plate (19) is hinged with a rotary table.
7. A boom system according to claim 6, characterized in that the second single pulling plate (13) is replaced by a force limiter (9).
8. A crawler crane, comprising a crane body, the crane body being connected to a boom system according to any of the preceding claims 1 to 7, the crane body being connected to a turntable (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211324631.XA CN115535890A (en) | 2022-10-27 | 2022-10-27 | Cantilever crane system and crawler crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211324631.XA CN115535890A (en) | 2022-10-27 | 2022-10-27 | Cantilever crane system and crawler crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115535890A true CN115535890A (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211324631.XA Pending CN115535890A (en) | 2022-10-27 | 2022-10-27 | Cantilever crane system and crawler crane |
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| CN (1) | CN115535890A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116605781A (en) * | 2023-03-13 | 2023-08-18 | 中建安装集团南方建设有限公司 | Vertical conveyor system for super high-rise building construction |
-
2022
- 2022-10-27 CN CN202211324631.XA patent/CN115535890A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116605781A (en) * | 2023-03-13 | 2023-08-18 | 中建安装集团南方建设有限公司 | Vertical conveyor system for super high-rise building construction |
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