CN220998998U - Crane operation mechanism - Google Patents
Crane operation mechanism Download PDFInfo
- Publication number
- CN220998998U CN220998998U CN202322556775.4U CN202322556775U CN220998998U CN 220998998 U CN220998998 U CN 220998998U CN 202322556775 U CN202322556775 U CN 202322556775U CN 220998998 U CN220998998 U CN 220998998U
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- slewing bearing
- support
- balance beam
- crane
- trolley
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- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 30
- 238000005452 bending Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000035929 gnawing Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The utility model discloses a crane running mechanism, which relates to the technical field of hoisting machinery and comprises a gantry crane lower beam, a first slewing bearing, a support, a balance beam, a second slewing bearing, a bogie frame, a trolley group and a speed reducer; the support is arranged on the upper part of the balance beam and extends upwards, the lower cross beam of the door machine is positioned above the support, and the first slewing bearing is arranged between the lower cross beam and the support; the trolley frame is positioned below the balance beam, the second slewing bearing is assembled between the trolley frame and the balance beam, the wheel set is installed on the trolley frame, the outer side of the wheel set is connected with the speed reducer, and the speed reducer drives the wheel set to rotate at a speed different from a speed when the trolley passes through a curve and to rotate normally when the trolley is in straight line walking. The double slewing bearing structure is adopted, so that the over-bending capacity of the running mechanism is increased, and the running mechanism stably runs on the special track form of straight line, small radius arc and straight line track; meanwhile, all the parts are connected by bolts or pin shafts, so that the structure is simple, and the installation and maintenance are facilitated.
Description
Technical Field
The utility model relates to the technical field of hoisting machinery, in particular to a traveling mechanism of a crane, which is suitable for a mobile hoist with large hoist capacity and a large-vehicle traveling track of straight line, small-radius arc and straight line and the like.
Background
At present, the running rail forms of the door machine of the hydropower station at home and abroad are mainly divided into an arc-shaped rail and a linear rail, and the linear rail, the small radius arc-shaped rail and the linear rail (shown in figure 3) are very rare.
In the prior art, a slewing bearing is added between a bogie frame and a portal lower cross beam and a large wheel and a small wheel are adopted to solve the problem that track gnawing is easy to occur when the portal is operated on an arc track and the running speeds of an inner rail and an outer rail are different. If the method is adopted in a straight line, a small radius arc and a straight line track, different walking speeds can be generated when the gantry crane walks on the straight line track, so that the problems of rail gnawing and the like are more likely to occur.
Disclosure of utility model
In order to overcome the defects in the prior art, the utility model aims to provide a crane running mechanism which solves the problems of the crane running mechanism in straight line, small radius arc and straight line track running by adopting a double slewing bearing design and differential running. The double slewing bearing is used for realizing the steering requirement of the travelling mechanism during the bending and straightening conversion by adding the slewing bearing between the bogie frame and the balance beam and between the balance beam and the lower balance beam of the bogie frame. The problem of inconsistent wheel speeds at the inner side and the outer side of the arc track section is solved through differential motion.
In order to achieve the above purpose, the present utility model adopts the technical scheme that:
A crane running mechanism comprises a gantry crane lower cross beam, a first slewing bearing, a support, a balance beam, a second slewing bearing, a bogie frame, a trolley group and a speed reducer;
The support is arranged on the upper part of the balance beam and extends upwards, the lower cross beam of the door machine is positioned above the support, and the first slewing bearing is arranged between the lower cross beam and the support; the trolley frame is positioned below the balance beam, the second slewing bearing is assembled between the trolley frame and the balance beam, the wheel set is installed on the trolley frame, the outer side of the wheel set is connected with the speed reducer, and the speed reducer drives the wheel set to rotate at a speed different from a speed when the trolley passes through a curve and to rotate normally when the trolley is in straight line walking.
Preferably, a plurality of trolley frames are arranged below the balance beam, and the distance between two adjacent trolley frames is 2500-2550mm.
Preferably, the wheel set adopts a cylindrical wheel with double rims, and the tread width of the wheel is 180-200mm.
Preferably, the first slewing bearing and the second slewing bearing both adopt three rows of roller slewing bearings.
Preferably, the first slewing bearing is connected with the upper and lower gantry crane lower cross beam and the support by bolts, the support is connected with the balance beam by pin shafts, and the second slewing bearing is connected with the upper and lower balance beam and the trolley frame by bolts.
Preferably, the speed reducer is a three-in-one speed reducer integrating a speed reducer, a motor and a brake.
Preferably, the lower cross beam and the balance beam of the gantry crane are both horizontally arranged.
The utility model has the beneficial effects that:
According to the crane running mechanism provided by the utility model, the first slewing bearing is arranged between the lower cross beam of the gantry crane and the support, the second slewing bearing is arranged between the balance beam and the bogie frame, and the double slewing bearing structure is adopted, so that compared with a single slewing bearing, the bending capacity of the running mechanism is increased, and the running mechanism stably runs in a special track form of straight line, small radius arc and straight line track; meanwhile, all the parts are connected by bolts or pin shafts, so that the structure is simple, and the installation and maintenance are facilitated.
According to the crane running mechanism provided by the utility model, the outer sides of the wheel sets are connected with the speed reducers, the speed reducers drive the wheel sets to rotate at a differential speed when the wheel sets are bent excessively and to normally rotate when the wheel sets walk linearly, namely the wheel sets on the inner and outer side rails of the crane are the same in size, and each wheel set is correspondingly provided with the speed reducer connected with the wheel set. When the vehicle runs in a straight line, the inner and outer side reducers drive the wheel sets with the same inner and outer sides to rotate at the same speed. When the vehicle is in over-bending, the inner and outer side reducers drive the wheel sets with the same inner and outer sides to rotate in a differential mode, so that the problem that the running speeds of the wheels on the inner and outer side rails are different when the vehicle is in over-bending is solved.
Drawings
FIG. 1 is a diagram of a crane operating mechanism arrangement of the present utility model;
FIG. 2 is a side elevational layout of the crane operating mechanism of the present utility model;
FIG. 3 is a crane rail layout;
reference numerals:
1. a lower beam of the gantry crane; 2. a first slewing bearing; 3. a support; 4. a balance beam; 5. a second slewing bearing; 6. a bogie frame; 7. a wheel set; 8. a speed reducer; 9. a crane; 10. a track.
Detailed Description
The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model.
Example 1
The crane running mechanism comprises a gantry crane lower beam 1, a first slewing bearing 2, a support 3, a balance beam 4, a second slewing bearing 5, a bogie frame 6, a wheel set 7 and a speed reducer 8, as shown in figures 1 and 2;
The support 3 is arranged on the upper part of the balance beam 4 and extends upwards, the lower cross beam 1 of the gantry crane is positioned above the support 3, and the first slewing bearing 2 is arranged between the lower cross beam 1 and the support 3; the bogie frame 6 is located below the balance beam 4, the second slewing bearing 5 is arranged between the bogie frame and the balance beam, the wheel set 7 is installed on the bogie frame 6, the outer side of the wheel set 7 is connected with the speed reducer 8, and the speed reducer 8 drives the wheel set 7 to rotate at a differential speed when in overbending and normally rotate when in straight line walking.
In the embodiment, a lower beam 1 of a gantry crane is arranged at the lower part of the gantry crane, a balance beam 4 is used for installing a plurality of trolley frames 6, the trolley frames 6 are used for installing wheel sets 7, the wheel sets 7 are used for traveling of the crane, and a speed reducer 8 is used for driving the wheel sets 7 to rotate so as to realize forward and backward traveling of the crane.
The first slewing bearing 2 is used for connecting the lower cross beam 1 of the door machine and the balance beam 4 of the cart travelling mechanism into a whole and has an axial rotation function. The second slewing bearing 5 is used for connecting the gantry crane frame 6 and the balance beam 4 into a whole, so that the diameter of the gantry crane frame 6 also has an axial rotation function.
Through setting the two slewing bearings, the whole wheel has an axial rotation function, when the track radius and the large vehicle base distance are determined, the radian of the arc determined by the wheel on the track is in direct proportion to the length of the corresponding chord, and the larger the radian, the larger the corresponding compensation value of the tread of the wheel is, so the reduction of the chord length is beneficial to overbending. The length of the corresponding chord can be reduced through the axial rotation function of the slewing bearing, so that the radian of the arc corresponding to the chord is reduced, and the turning is smoother.
In addition, the wheel sets 7 on the inner and outer tracks of the crane are the same in size, and each wheel set 7 is correspondingly provided with a speed reducer 8 connected with the wheel set. When the vehicle runs in a straight line, the inner and outer side speed reducers 8 drive the wheel sets 7 with the same inner and outer sides to rotate at the same speed. When the vehicle is in overbending, the inner and outer side speed reducers 8 drive the wheel sets 7 with the same inner and outer sides to rotate in a differential mode, so that the problem that the running speeds of the wheels on the inner and outer side rails are different when the vehicle is in overbending is solved.
Example 2
The embodiment is further described on the basis of embodiment 1, as shown in fig. 1, a plurality of trolley frames 6 are arranged below the balance beam 4, and the distance between two adjacent trolley frames 6 is 2500-2550mm.
In the prior art, the distance between two adjacent trolley frames 6 is 2550mm. For a crane with large opening and closing capacity, the number of wheel sets can be increased, and the door motor has poor bending capability. In this embodiment, the number of trolley sets is two, the distance between two adjacent trolley frames 6 is smaller than that in the prior art, that is, the distance between two adjacent trolley sets 7 is smaller than that in the prior art, the door machine bending capability is increased by reducing the distance A (figure 1) between the two trolley frames, and the smaller the distance A is, the smaller the radius of the arc track through which the crane passes is.
Example 3
This embodiment is further described on the basis of embodiment 2, as shown in fig. 1 and 2, the wheel set 7 is a cylindrical wheel with double rims, and the tread width of the wheel is 180-200mm.
In the prior art, the tread width of the wheel is 180mm. In this embodiment, the wheels are cylindrical wheels with double rims, which has the advantage of guiding and preventing derailment during door operation. The tread width of the wheel is larger than that in the prior art, and by increasing the tread width B (figure 2), the tread width has the advantages that the distance between the wheel rim and the inner side of the track is increased, the contact probability of the wheel rim and the track when the wheel rim is over-bent is reduced, and then the track gnawing phenomenon of the running mechanism is reduced.
Example 4
The embodiment is further described on the basis of embodiment 3, as shown in fig. 1 and 2, the first slewing bearing 2 and the second slewing bearing 5 are three rows of roller slewing bearings, so that the rotation angles of the balance beam 4 and the bogie frame 6 on the horizontal plane are more flexible.
As shown in fig. 1 and 2, the first slewing bearing 2 is connected with the upper and lower gantry crane lower cross beam 1 and the support 3 through bolts, the support 3 is connected with the balance beam 4 through a pin shaft, and the second slewing bearing 5 is connected with the upper and lower balance beam 4 and the trolley frame 6 through bolts. All parts are connected by bolts or pin shafts, so that the structure is simple, and the installation and maintenance are facilitated.
The speed reducer 8 is a three-in-one speed reducer, and the three-in-one speed reducer is a speed reducer integrating a speed reducer, a motor and a brake. Has the characteristics of compact structure, large transmission torque, stable work, low noise, long service life and the like. The lower cross beam 1 and the balance beam 4 of the gantry crane are both horizontally arranged.
While the embodiments of the present utility model have been described in detail, the present utility model is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (7)
1. The crane running mechanism is characterized by comprising a gantry crane lower cross beam (1), a first slewing bearing (2), a support (3), a balance beam (4), a second slewing bearing (5), a trolley frame (6), a wheel set (7) and a speed reducer (8);
The support (3) is arranged on the upper part of the balance beam (4) and extends upwards, the lower cross beam (1) of the door machine is positioned above the support (3), and the first slewing bearing (2) is arranged between the lower cross beam and the support; the trolley frame (6) is located below the balance beam (4) and is provided with the second slewing bearing (5) between the two, the wheel set (7) is installed on the trolley frame (6), the outer side of the wheel set (7) is connected with the speed reducer (8), and the speed reducer (8) drives the wheel set (7) to rotate at a differential speed when in overbending and to normally rotate when in straight line walking.
2. Crane operating mechanism according to claim 1, characterized in that several trolley frames (6) are arranged below the balance beam (4), the distance between two adjacent trolley frames (6) being 2500-2550mm.
3. Crane operating mechanism according to claim 1, characterized in that the wheel set (7) is a double rim cylindrical wheel with a tread width of 180-200mm.
4. Crane operating mechanism according to claim 1, characterized in that the first slewing bearing (2) and the second slewing bearing (5) each employ three rows of roller slewing bearings.
5. The crane operating mechanism according to claim 1, wherein the first slewing bearing (2) is connected with the upper and lower gantry crane lower cross beam (1) and the support (3) through bolts, the support (3) is connected with the balance beam (4) through pin shafts, and the second slewing bearing (5) is connected with the upper and lower balance beam (4) and the bogie frame (6) through bolts.
6. Crane operating mechanism according to claim 1, characterized in that the decelerator (8) is a three-in-one decelerator integrating a decelerator, a motor and a brake.
7. Crane operating mechanism according to claim 1, characterized in that the gantry crane lower beam (1) and the balance beam (4) are both arranged horizontally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322556775.4U CN220998998U (en) | 2023-09-20 | 2023-09-20 | Crane operation mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322556775.4U CN220998998U (en) | 2023-09-20 | 2023-09-20 | Crane operation mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220998998U true CN220998998U (en) | 2024-05-24 |
Family
ID=91123611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322556775.4U Active CN220998998U (en) | 2023-09-20 | 2023-09-20 | Crane operation mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220998998U (en) |
-
2023
- 2023-09-20 CN CN202322556775.4U patent/CN220998998U/en active Active
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