CN212769549U

CN212769549U - Slewing support structure of small crane

Info

Publication number: CN212769549U
Application number: CN202021179757.9U
Authority: CN
Inventors: 周从庆
Original assignee: Yichang Changfeng Gangji Manufacturing Co ltd
Current assignee: Yichang Changfeng Gangji Manufacturing Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-03-23
Anticipated expiration: 2030-06-23

Abstract

The utility model provides a rotary supporting structure of a small crane, wherein a rotary table of the crane is rotationally connected with a base, a driving device drives the rotary table to rotate, a motor in the driving device is connected with a driving gear through a driving box, the driving gear is meshed with a rotary gear, the rotary gear is fixedly connected with the rotary table, the interior of the driving box is connected with the driving gear through multi-section gear transmission, the driving gear and the rotary gear are straight gears or helical gears or herringbone gears, the driving box comprises a shell, a worm is arranged in the shell, the worm drives a driven gear to rotate, the driven gear is connected with the driving gear through a connecting shaft, the driving box is driven by the motor, the driving box drives the rotary gear again, the rotary table rotates stably, the worm is adopted for driving, the condition that the rotary table drives the driving gear to rotate can not occur, the locking function is realized, and the, the contact ratio of the gears in meshing is increased, and the stress performance of the gears is optimized.

Description

Slewing support structure of small crane

Technical Field

The utility model belongs to the technical field of the hoist gyration and specifically relates to a small crane gyration bearing structure is related to.

Background

The swing mechanism of the portal crane consists of a swing supporting device and a swing driving device. The rotary supporting device provides stable support for the rotary part of the gantry crane and transmits pressure and moment from the rotary part to the gantry. The rotary driving device is used for driving the rotary part to rotate relative to the portal. The slewing mechanism is used for transporting the goods along an arc in a horizontal plane around the vertical axis of the portal crane.

At present, the rotation mechanism of hoist in the market, motor reduction gear is complicated, the drive is unstable, the transmission efficiency of gear is low, there is not self-locking function, it is comparatively difficult to maintain, it is used for driving the rotatory drive gear of revolving stage to adopt the straight-tooth structure usually, it is corresponding, slewing bearing's that meshes mutually with drive gear outer lane also is the straight-tooth structure, it has the gear meshing degree low, the transmission is unstable, short service life's problem, and along with continuous motion friction between drive gear and the slewing bearing outer lane, the meshing clearance can be bigger and bigger, the meshing degree is lower and lower, the transmission is very unstable.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main objective is providing a small crane gyration bearing structure, and it is complicated to solve the rotatory speed reduction gear of rotation mechanism drive revolving stage, does not have self-locking function's problem.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a rotary supporting structure of a small crane is characterized in that a rotary table of the crane is rotatably connected with a base, a driving device drives the rotary table to rotate, a motor in the driving device is connected with a driving gear through a driving box, the driving gear is meshed with a rotary gear, the rotary gear is fixedly connected with the rotary table, and the interior of the driving box is connected with the driving gear through multi-section gear transmission.

In a preferable scheme, the driving gear and the rotary gear are straight gears, or helical gears, or herringbone gears.

In the preferred scheme, the driving box comprises a shell, a worm is arranged in the shell and drives a driven gear to rotate, and the driven gear is connected with the driving gear through a connecting shaft.

In the preferred scheme, a synchronizing gear is arranged between the worm and the driven gear, a large gear of the synchronizing gear is meshed with the worm, and a small gear of the synchronizing gear is meshed with the driven gear.

In a preferred scheme, the output end of the motor is connected with the worm.

In a preferred scheme, a plurality of supporting bearings are arranged between the rotary table and the base.

In the preferred scheme, the end part of the rotary table is provided with a second support bearing, one side of the second support bearing is abutted against the bottom of the base, and the other side of the second support bearing is abutted against the lower end face of the support column.

In the preferred scheme, support column up end and the spacing platform position of base opening are equipped with first support bearing.

In the preferred scheme, an avoiding groove body is arranged at the position of the upper end face of the first support bearing for mounting the rotary table, and an outer boss of the avoiding groove body abuts against an outer ring of the first support bearing.

In a preferred embodiment, the support bearing is a tapered roller bearing or a thrust roller bearing.

The utility model provides a small crane gyration bearing structure adopts the motor to drive the drive case, and the drive case drives slewing gear again, makes the revolving stage rotate steadily, and adopts worm drive, and the revolving stage can not appear and drive the condition that drive gear turned round, realizes the function of locking, and adopts skewed tooth or herringbone gear meshing, and the contact ratio of gear when having increased the meshing has optimized the atress performance of gear, under the same load condition, can do slewing structure compacter. Meanwhile, the herringbone gear structure counteracts axial force generated during transmission of the single bevel gear, harmful axial friction is reduced, and the whole rotary table is supported by the plurality of supporting bearings, so that the rotary table is more stable in structure, simple in structure and convenient to use.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a general block diagram of the present invention;

FIG. 2 is a structural diagram of the present invention;

FIG. 3 is a view showing the internal structure of the driving box of the present invention;

FIG. 4 is a structural view of the inner support of the turntable of the present invention;

FIG. 5 is a side view of the structure of the turntable;

in the figure: a turntable 1; a base 2; a drive gear 3; a motor 4; a rotary gear 5; a drive case 6; a driven gear 601; a housing 602; a worm 603; a synchronizing gear 604; a first support bearing 7; a support column 8; a second support bearing 9; avoiding the groove body 10.

Detailed Description

As shown in figures 1-5, a rotary table 1 of a small crane is rotatably connected with a base 2, a driving device drives the rotary table 1 to rotate, a motor 4 in the driving device is connected with a driving gear 3 through a driving box 6, the driving gear 3 is meshed with a rotary gear 5, the rotary gear 5 is fixedly connected with the rotary table 1, and the inside of the driving box 6 is connected with the driving gear 3 through multi-section gear transmission. With the structure, the multi-section gear drives the driving gear 3 to rotate, so that the torque of the driving gear 3 is increased, the rotary table 1 is driven more easily, and the burden of the motor 4 is reduced.

In a preferred scheme, the driving gear 3 and the rotary gear 5 are straight gears, or helical gears, or herringbone gears. By the structure, the helical teeth or the herringbone gears are meshed, the contact ratio of the gears during meshing is increased, the stress performance of the gears is optimized, and the rotary structure can be made more compact under the same load condition. Meanwhile, the structure of the herringbone gear offsets the axial force generated during the transmission of the single bevel gear, and the harmful axial friction is reduced.

In a preferred scheme, the driving box 6 comprises a shell 602, a worm 603 is arranged in the shell 602, the worm 603 drives a driven gear 601 to rotate, and the driven gear 601 is connected with the driving gear 3 through a connecting shaft. From this structure, worm 603 drive driven gear 601, driven gear 601 drive gear 3, as the structure shown in fig. 3, the interior simple structure of drive case 6 adopts the mode drive of worm 603, makes the drive more steady, and worm 603 is from taking self-locking function.

Preferably, a synchronizing gear 604 is arranged between the worm 603 and the driven gear 601, a large gear of the synchronizing gear 604 is meshed with the worm 603, and a small gear of the synchronizing gear 604 is meshed with the driven gear 601. With this structure, the synchronizing gear 604 increases the rotational torque of the driven gear 601, making the output torque larger and the output rotation smoother.

In a preferred scheme, the output end of the motor 4 is connected with a worm 603. With the structure, as shown in fig. 1, the output end of the motor 4 is connected with the end of the worm 603 through a coupling.

In a preferred scheme, a plurality of supporting bearings are arranged between the rotary table 1 and the base 2. With the structure, the support bearing plays a role in supporting and rotating.

In the preferred scheme, the end part of the rotary table 1 is provided with a second supporting bearing 9, one side of the second supporting bearing 9 is abutted against the bottom of the base 2, and the other side of the second supporting bearing 9 is abutted against the lower end face of the supporting column 8. With this structure, as shown in fig. 4 to 5, the turntable 1 is supported for rotation by the second support bearing 9, and the support column 8 is supported on the second support bearing 9.

In the preferred scheme, the position of the upper end surface of the support column 8 and the position of the opening limit table of the base 2 is provided with a first support bearing 7. By the structure, the first supporting bearing 7 and the second supporting bearing 9 are matched for use, so that the rotating supporting effect is better.

In the preferred scheme, an avoiding groove body 10 is arranged at the position of the upper end face of the first supporting bearing 7 installed on the rotary table 1, and a boss outside the avoiding groove body 10 abuts against an outer ring of the first supporting bearing 7. With this construction, as shown in fig. 4-5, the relief groove 10 is adapted to abut against the outer ring of the first support bearing 7, forcing part of the force against the first support bearing 7.

In a preferred embodiment, the support bearing is a tapered roller bearing or a thrust roller bearing. With the structure, the scheme preferably adopts the tapered roller bearing, and the supporting bearing is selected according to the use condition.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a small-size hoist gyration bearing structure, revolving stage (1) and base (2) of hoist are rotated and are connected, and drive arrangement drive revolving stage (1) rotates characterized by: a motor (4) in the driving device is connected with a driving gear (3) through a driving box (6), the driving gear (3) is meshed with a rotary gear (5), the rotary gear (5) is fixedly connected with a rotary table (1), and the interior of the driving box (6) is connected with the driving gear (3) through multi-section gear transmission.

2. The slewing support structure of a small crane according to claim 1, wherein: the driving gear (3) and the rotary gear (5) are straight gears, or helical gears, or herringbone gears.

3. The slewing support structure of a small crane according to claim 1, wherein: the driving box (6) comprises a shell (602), a worm (603) is arranged in the shell (602), the worm (603) drives a driven gear (601) to rotate, and the driven gear (601) is connected with the driving gear (3) through a connecting shaft.

4. A slewing support structure for a small-sized crane according to claim 3, wherein: a synchronizing gear (604) is arranged between the worm (603) and the driven gear (601), a large gear of the synchronizing gear (604) is meshed with the worm (603), and a small gear of the synchronizing gear (604) is meshed with the driven gear (601).

5. A slewing support structure for a small-sized crane according to claim 3, wherein: the output end of the motor (4) is connected with the worm (603).

6. The slewing support structure of a small crane according to claim 1, wherein: a plurality of supporting bearings are arranged between the rotary table (1) and the base (2).

7. The slewing support structure of a small crane according to claim 6, wherein: the end part of the turntable (1) is provided with a second supporting bearing (9), one side of the second supporting bearing (9) is abutted against the bottom of the base (2), and the other side of the second supporting bearing is abutted against the lower end face of the supporting column (8).

8. The slewing support structure of a small crane according to claim 6, wherein: the upper end surface of the supporting column (8) and the position of the opening limit table of the base (2) are provided with a first supporting bearing (7).

9. The slewing support structure of a small crane according to claim 8, wherein: the upper end face of the first supporting bearing (7) installed on the rotary table (1) is provided with an avoiding groove body (10), and an outer boss of the avoiding groove body (10) abuts against an outer ring of the first supporting bearing (7).

10. The slewing support structure of a small crane according to claim 6, wherein: the support bearing is a tapered roller bearing or a thrust roller bearing.