CN215626346U - Shock attenuation connecting device, tower crane balance arm assembly and tower crane - Google Patents
Shock attenuation connecting device, tower crane balance arm assembly and tower crane Download PDFInfo
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- CN215626346U CN215626346U CN202121528617.2U CN202121528617U CN215626346U CN 215626346 U CN215626346 U CN 215626346U CN 202121528617 U CN202121528617 U CN 202121528617U CN 215626346 U CN215626346 U CN 215626346U
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- shock
- absorbing
- circular table
- balance arm
- damping
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- 230000035939 shock Effects 0.000 title claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
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Abstract
The utility model relates to the field of construction machinery, and discloses a shock absorption connecting device, a tower crane balance arm assembly and a tower crane. The damping connecting device comprises a fastening piece for connecting a hoisting mechanism (1) and a balance arm of the tower crane and a damping element sleeved on the fastening piece, wherein the damping element is provided with a first damping part and a second damping part, the first damping part is positioned between a mechanism connecting plate (11) of the hoisting mechanism (1) and a mounting plate (21) of the balance arm, and the second damping part is positioned on one side, far away from the mechanism connecting plate (11), of the mounting plate (21) in the mounting state. According to the utility model, the first damping part is used for isolating the hoisting mechanism from the balance arm, and the second damping part is used for isolating the fastener from the balance arm, so that the vibration energy of the hoisting mechanism during working is prevented from being transmitted to the balance arm and other parts, the noise generated in the working state of the hoisting mechanism is reduced, the safety of the tower crane is improved, and the user experience is improved.
Description
Technical Field
The utility model relates to the field of construction machinery, in particular to a damping connecting device. On the basis, the balance arm assembly of the tower crane and the tower crane are further related.
Background
The hoisting mechanism of tower crane is a direct action mechanism for hoisting heavy objects, and its transmission system has large driving power and wide speed range. The hoisting mechanism is arranged on a balance arm of the tower crane, and the existing hoisting mechanism is rigidly connected with the balance arm through a pin shaft. Because the hoisting mechanism inevitably produces vibrations in the operation process, these vibrations transmit other positions such as balance arm, body of the tower again, arouse the resonance and the noise of other positions, not only influence the operation travelling comfort, long before, still will cause connecting bolt's not hard up, cause the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the lifting mechanism in the prior art vibrates excessively when working and the vibration is continuously transmitted to a balance arm and a tower body, and provides a vibration damping connecting device which can effectively isolate the vibration of the lifting mechanism when working, avoid the vibration energy from being transmitted to the balance arm and the like, and improve the comfort of workers.
In order to achieve the above object, the present invention provides a shock-absorbing connecting device, which includes a fastening member for connecting a hoisting mechanism and a balance arm of a tower crane, and a shock-absorbing member fitted over the fastening member, and which is configured to have, in an installed state, a first shock-absorbing portion located between a mechanism connecting plate of the hoisting mechanism and a mounting plate of the balance arm, and a second shock-absorbing portion located on a side of the mounting plate away from the mechanism connecting plate.
Optionally, the damping element includes a first damping block and a second damping block, the first damping block has the first damping portion, the second damping block serves as the second damping portion and is a cylindrical body with a circular ring-shaped cross section, and the second damping block can be sleeved on the first damping block at a position opposite to the first damping portion at an interval.
Optionally, the first damper block includes a damping circular table portion and a bushing coaxially disposed, the bushing is disposed inside the circular table portion, one end of the bushing is flush with one side of the damping circular table portion, the other end protrudes out of the other side of the damping circular table portion, the circular table portion includes a first circular table portion serving as the first damper portion and a second circular table portion protruding from the first circular table portion and extending from one side of the second damper block, a diameter of the second circular table portion is smaller than that of the first circular table portion, and the fastener can pass through a through hole in the bushing to connect the hoisting mechanism and the balance arm.
Optionally, the second damper block may be sleeved on the bushing and clamped on one side of the damping circular table portion, a sum of axial heights of the second damper block and the damping circular table portion is greater than an axial height of the bushing, and a diameter of the second damper block is the same as a diameter of the first circular table portion.
Optionally, the damping circular table portion and the second damping block are made of rubber, and the bushing is made of metal.
Optionally, the fastener comprises a bolt and a nut.
The utility model provides a tower crane balance arm assembly, which comprises a plurality of shock absorption connecting devices.
Optionally, a mounting hole is formed in the mounting plate, a fillet or a chamfer is arranged on the inner side of the mounting hole, and the mounting hole can be sleeved on the outer side of the second circular table portion.
Optionally, the diameter of the mounting hole is larger than the diameter of the second circular table portion.
The third aspect of the utility model provides a tower crane, which comprises the above balance arm assembly of the tower crane.
According to the utility model, the first damping part is used for isolating the hoisting mechanism from the balance arm, the second damping part is used for isolating the fastener from the balance arm, the first damping part is compressed to absorb vibration when the hoisting mechanism moves downwards, and the second damping part is compressed to absorb vibration when the hoisting mechanism moves upwards, so that the vibration energy generated when the hoisting mechanism works is prevented from being transmitted to the balance arm and the like, the noise generated when the hoisting mechanism works is reduced, the resonance between the hoisting mechanism and each part of the tower crane when the hoisting mechanism works is prevented, the safety of the tower crane is improved, and the comfort of workers during operation is improved.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a view of the shock absorbing interface of the present invention in connection with a hoist and balance arm;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is an enlarged view of a portion of I of FIG. 1;
FIG. 4 is an embodiment of the shock absorbing attachment of the present invention;
figure 5 is an alternative connection of the shock absorbing hitch of the present invention to a hoist and balance arm.
Description of the reference numerals
1-a hoisting mechanism; 11-a mechanism connecting plate; 21-mounting a plate; 31-a first snubber block; 311-a first dome; 312-a second dome; 313-a bushing; 32-a second snubber block; 4-a bolt; 5-nut.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the terms of orientation such as "upper and lower" are generally used to refer to the orientation shown in fig. 1, and "inner and outer" refer to the inner and outer relative to the outline of each member itself.
The utility model provides a shock-absorbing connecting device which comprises a fastening piece for connecting a hoisting mechanism 1 and a balance arm of a tower crane and a shock-absorbing element sleeved on the fastening piece, wherein the shock-absorbing element is provided with a first shock-absorbing part positioned between a mechanism connecting plate 11 of the hoisting mechanism 1 and a mounting plate 21 of the balance arm and a second shock-absorbing part positioned on one side of the mounting plate 21 far away from the mechanism connecting plate 11 in a mounting state.
The hoisting mechanism 1 can generate vibration in the vertical or horizontal direction during operation and transmit the vibration energy to the balance arm through the fastening piece. According to the utility model, the first damping part is used for isolating the hoisting mechanism 1 from the balance arm, the second damping part is used for isolating the fastener from the balance arm, when the hoisting mechanism 1 moves downwards, the first damping part is compressed to absorb vibration, so that the mechanical energy of the vibration is converted into the internal energy of the first damping part, when the hoisting mechanism 1 moves upwards, the second damping part is compressed to absorb vibration, so that the mechanical energy of the vibration is converted into the internal energy of the second damping part, the vibration energy of the hoisting mechanism 1 during working is prevented from being transmitted to the balance arm and other parts, the noise generated in the working state of the hoisting mechanism 1 is reduced, the resonance between the hoisting mechanism 1 and each part of the tower crane during working is avoided, the safety of the tower crane is improved, and the comfort of workers during operation is improved.
According to an embodiment of the present invention, as shown in fig. 1 to 3, the damper element includes a first damper block 31 and a second damper block 32, the first damper block 31 has the first damper portion, the second damper block 32 serves as the second damper portion and has a cylindrical shape with a circular ring-shaped cross section, and the second damper block 32 can be fitted over the first damper block 31 at a position spaced apart from and facing the first damper portion.
Further, as shown in fig. 4, the first damper block 31 includes a damper circular table portion and a bushing 313 coaxially disposed, the bushing 313 is disposed inside the circular table portion, one end of the bushing 313 is flush with one side of the damper circular table portion, and the other end protrudes from the other side of the damper circular table portion, the circular table portion includes a first circular table portion 311 as the first damper portion and a second circular table portion 312 protruding from the first circular table portion 311 toward one side of the second damper block 32, the second circular table portion 312 has a smaller diameter than the first circular table portion 311, and the fastening member can pass through a through hole in the bushing 313 to connect the hoisting mechanism 1 and the balance arm. Furthermore, the damping circular table portion is made of rubber, the bushing 313 is made of metal, and the damping circular table portion is connected with the bushing 313 in a non-detachable mode.
Specifically, the damping circular table portion and the second damping block 32 are made of rubber, and the rubber may be natural rubber, nitrile rubber, silicone rubber, or the like. When the material of the damping rubber is selected, the vibration frequency of the hoisting mechanism 1 needs to be avoided, otherwise, the damping element and the hoisting mechanism 1 generate resonance, so that the damping effect is not achieved, the vibration of the hoisting mechanism 1 is strengthened, and the vibration energy transmitted to the balance arm is increased.
As shown in fig. 1 and 3, the second damper block 32 can be sleeved on the bushing 313 and clamped on one side of the damping circular table portion, the sum of the axial heights of the second damper block 32 and the damping circular table portion is greater than the axial height of the bushing 313, and the diameter of the second damper block 32 is the same as that of the first circular table portion 311. The fastener comprises a bolt 4 and a nut 5, and further comprises a large washer.
After the first damper block 31 and the second damper block 32 are installed, bolts 4 sequentially penetrate through the mechanism connecting plate 11 and the bushing 313, the bolt heads of the bolts 4 are arranged on one side of the mechanism connecting plate 11, and the other side of the bolts is fastened by nuts 5.
In another embodiment of the present invention, a large washer is further used on the side of the nut 5 close to the second damper block 32, the large washer is a circular ring-shaped thin plate, the outer diameter of the large washer is larger than the diameter of the second damper block 32, and the large washer can uniformly compress the second damper block 32, so that the force applied to the second damper block 32 is more uniform. After the damping connecting device is installed, an installation tool (such as a socket or a wrench) is needed to fasten the bolt 4 and the nut 5, so that the bolt 4 and the nut 5 are within a required torque range, the purpose of the bushing 313 is to limit the compression amount of the second damping block 32, so that the second damping block 32 is compressed to the same height as the bushing 313 in the axial direction at most, if the bushing 313 is not provided, the second damping block 32 needs a very large compression amount to install the fastener to the required torque, and under the working condition of vibration, because the second damping block 32 is made of an elastic rubber material, the bolt 4 and the nut 5 are easy to loosen, and a potential safety hazard is caused.
In another embodiment of the utility model, the damping element may comprise only a first damping mass 31, the first damping mass 31 having the first damping portion, the first damping mass 31 being able to form a second damping portion in the mounted state. And the damping element comprises a damping circular table part and a bushing, the axial height of the bushing is smaller than that of the damping circular table part, and the bushing is connected with the damping circular table part in a non-detachable mode.
In addition, as shown in fig. 1 to 3, the present invention provides a tower crane balance arm assembly, which includes a plurality of the above-mentioned shock-absorbing connecting devices.
Specifically, a mounting hole is formed in the mounting plate 21 of the balance arm, a fillet or a chamfer is arranged on the inner side of the mounting hole, and the mounting hole can be sleeved on the outer side of the second circular table portion 312. In a preferred embodiment of the present invention, in order to facilitate the installation of the first damper block 31, the diameter of the installation hole is larger than the diameter of the second circular table portion 312.
Because damping circular table portion is the rubber material, and the rubber material can lead to under receiving the effect of shearing force damping circular table portion's life-span is showing and is descending, consequently the inboard of mounting hole sets up fillet or chamfer, avoids the inboard edge fish tail of mounting hole or fracture damping circular table portion. In addition, the hoisting mechanism 1 inevitably generates horizontal vibration during operation, and in another embodiment of the present invention, the diameter of the second circular table portion 312 is smaller than the diameter of the mounting hole, so that the second circular table portion 312 needs to be pressed into the mounting hole, thereby filling up the gap between the mounting plate 21 and the bushing 313, enabling the hoisting mechanism 1 and the balance arm to move synchronously, and further reducing the vibration energy transmitted to the balance arm by the hoisting mechanism 1. In addition, since the diameter of the second circular table portion 312 is smaller than that of the mounting hole, in order to reduce the friction force applied to the second circular table portion 312 during mounting, a lubricant may be applied to the outside of the second circular table portion 312, thereby facilitating mounting.
In one embodiment of the utility model, as shown in fig. 1 to 3, the mechanism connecting plate 11 is parallel to the mounting plate 21 and forms an acute angle with the horizontal ground, and at least part of the shock-absorbing connecting device is obliquely connected with the mechanism connecting plate 11 and the mounting plate 21. In other embodiments of the utility model, as shown in fig. 5, at least a portion of the shock absorbing attachment means is horizontally attached to the mechanism attachment plate 11 and the mounting plate 21.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The damping connecting device is characterized by comprising a fastening piece and a damping element, wherein the fastening piece is used for connecting a hoisting mechanism (1) and a balance arm of a tower crane, the damping element is sleeved on the fastening piece, and the damping element is provided with a first damping part and a second damping part, the first damping part is positioned between a mechanism connecting plate (11) of the hoisting mechanism (1) and a mounting plate (21) of the balance arm, and the second damping part is positioned on one side, far away from the mechanism connecting plate (11), of the mounting plate (21) in a mounting state.
2. The shock-absorbing connecting device according to claim 1, wherein the shock-absorbing member includes a first shock-absorbing block (31) and a second shock-absorbing block (32), the first shock-absorbing block (31) has the first shock-absorbing portion, the second shock-absorbing block (32) serves as the second shock-absorbing portion and has a cylindrical body with a circular ring-shaped cross section, and the second shock-absorbing block (32) is capable of being fitted over the first shock-absorbing block (31) at a position spaced opposite to the first shock-absorbing portion.
3. A shock-absorbing connecting device according to claim 2, wherein said first shock-absorbing block (31) comprises a shock-absorbing circular table portion and a bushing (313) coaxially arranged, said bushing (313) is arranged inside said circular table portion, one end of said bushing (313) is flush with one side of said shock-absorbing circular table portion, and the other end protrudes from the other side of said shock-absorbing circular table portion, said circular table portion comprises a first circular table portion (311) as said first shock-absorbing portion and a second circular table portion (312) protruding from the first circular table portion (311) and extending toward the side of said second shock-absorbing block (32), said second circular table portion (312) has a smaller diameter than said first circular table portion (311), and said fastening member can pass through a through hole in said bushing (313) to connect said hoisting mechanism (1) and said balance arm.
4. The shock-absorbing connecting device according to claim 3, wherein the second shock-absorbing block (32) can be sleeved on the bushing (313) and clamped on one side of the shock-absorbing circular table part, the sum of the axial heights of the second shock-absorbing block (32) and the shock-absorbing circular table part is greater than the axial height of the bushing (313), and the diameter of the second shock-absorbing block (32) is the same as that of the first circular table part (311).
5. A shock absorbing connecting device according to claim 3, characterized in that said shock absorbing dome and said second shock absorbing mass (32) are of rubber material and said bushing (313) is of metal.
6. A shock absorbing connection device according to claim 1, characterized in that the fastening member comprises a bolt (4) and a nut (5).
7. A balance arm assembly of a tower crane, wherein the balance arm assembly of the tower crane comprises a plurality of shock absorbing connection devices according to any one of claims 3 to 5.
8. The balance arm assembly of the tower crane according to claim 7, wherein the mounting plate (21) is provided with a mounting hole, the inner side of the mounting hole is provided with a fillet or a chamfer, and the mounting hole can be sleeved outside the second circular table part (312).
9. The tower crane balance arm assembly of claim 8, wherein the diameter of the mounting hole is greater than the diameter of the second circular table portion (312).
10. A tower crane, characterized in that it comprises a tower crane jib assembly according to any of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121528617.2U CN215626346U (en) | 2021-07-06 | 2021-07-06 | Shock attenuation connecting device, tower crane balance arm assembly and tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121528617.2U CN215626346U (en) | 2021-07-06 | 2021-07-06 | Shock attenuation connecting device, tower crane balance arm assembly and tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215626346U true CN215626346U (en) | 2022-01-25 |
Family
ID=79948206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121528617.2U Active CN215626346U (en) | 2021-07-06 | 2021-07-06 | Shock attenuation connecting device, tower crane balance arm assembly and tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215626346U (en) |
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2021
- 2021-07-06 CN CN202121528617.2U patent/CN215626346U/en active Active
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