CN218266798U

CN218266798U - Heavy-load straight-tooth driving slewing bearing

Info

Publication number: CN218266798U
Application number: CN202221987474.6U
Authority: CN
Inventors: 郭贝贝; 王浩; 董佳明
Original assignee: LUOYANG LONGDA BEARING CO Ltd
Current assignee: LUOYANG LONGDA BEARING CO Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2023-01-10
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a heavy-load straight-tooth driving slewing bearing, which comprises a slewing bearing, wherein the slewing bearing comprises an inner ring and an outer ring, two groups of rollers are uniformly arranged between the inner ring and the outer ring through two retainers, the two groups of rollers are spherical rollers, and the diameters of the two groups of rollers are the same; and the upper side and the lower side of the inner ring and the outer ring are both provided with sealing rings, each sealing ring comprises a sealing ring body, one side of each sealing ring body is clamped in a clamping groove formed in the upper part of the outer surface of the inner ring, and the other side of each sealing ring body is provided with a sealing lip connected with the outer ring. The heavy-load straight-tooth driving slewing bearing changes a single-row ball structure of the slewing bearing into a double-row ball structure with the same diameter, and can be installed in a small installation space while meeting the requirement of a customer that the bearing bears a large load; the sealing ring with the double sealing lips can greatly improve the sealing property, and has an effective protection effect on the rolling body and the roller path, thereby prolonging the service life of the bearing.

Description

Heavy-load straight-tooth driving slewing bearing

Technical Field

The utility model relates to a slewing bearing technical field specifically is a heavy load straight-tooth drive slewing bearing.

Background

When the slewing bearing uses straight tooth drive, the following problems exist: part of straight tooth driving installation space is narrow, the load to be borne in actual work is larger, the bearing capacity of the common single-row four-point spherical straight tooth driving device meets the requirement, the required installation space is too large to be used, the size is suitable to be installed, and the bearing capacity cannot meet the use requirement; in the working process of heavy-load straight-tooth driving, grease often overflows from the end face, an ordinary sealing strip often upwards tilts, particularly straight-tooth driving which often works in an outdoor environment is adopted, some dust and sand grains can be attached to the surface of a bearing after wind rises and enter the inside of a roller path when the straight-tooth driving runs, the friction force of the rolling body and the roller path is rapidly increased, and the roller path and the rolling body are peeled off, peeled off and cracked, so that the bearing is rapidly failed and scrapped. We therefore propose a heavy-duty spur-drive slewing bearing.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, a heavy load straight-tooth drive slewing bearing is provided, slewing bearing single-row ball structure changes into double row ball structure with the footpath, when satisfying customer's requirement bearing and bearing great load, also can accomplish the installation in less installation space, the leakproofness can be improved greatly through the sealing washer that uses the double-seal lip simultaneously, effectual guard action has been played rolling element and raceway, and then the life of bearing has been prolonged, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a heavy load straight-tooth drive slewing bearing, includes slewing bearing, slewing bearing includes inner circle and outer lane, evenly is provided with two sets of rollers through two cages between inner circle and the outer lane, and two sets of rollers are spherical roller, and two sets of roller diameters are the same.

The sealing ring comprises a sealing ring body, one side of the sealing ring body is clamped in a clamping groove formed in the upper portion of the outer surface of the inner ring, a sealing lip connected with the outer ring is arranged on the other side of the sealing ring body, an annular groove is formed in the surface of the other side, opposite to the clamping groove, of the sealing ring body, and a powerful steel wire spring ring is arranged in the annular groove.

The rotary bearing is further provided with a connecting flange, a pinion, a speed reducer bearing, a pinion bearing and a fixing shaft, the pinion is arranged in the shell of the rotary bearing and is meshed with straight teeth on an outer ring, the upper outer side surface of the pinion is provided with the speed reducer bearing, the lower inner side surface of the pinion is provided with the pinion bearing, the inner ring of the pinion bearing is provided with the fixing shaft, and the connecting flange is arranged above the speed reducer bearing.

As a preferred technical scheme of the utility model, the cross-sectional shape of seal lip is "C" shape.

As a preferred technical scheme of the utility model, the seal lip is including setting up the last seal lip and the lower seal lip in upper and lower both sides respectively.

As a preferred technical scheme of the utility model, the upper surface inboard of outer lane is opened and is equipped with the little step that corresponds with lower seal lip, upper seal lip and outer lane upper surface contact, lower seal lip and little step contact during the slewing bearing installation.

Compared with the prior art, the beneficial effects of the utility model are that: the heavy-load straight-tooth driving slewing bearing changes a single-row ball structure of the slewing bearing into a double-row ball structure with the same diameter, and can be installed in a small installation space while meeting the requirement of a customer that a bearing bears a large load, so that the straight-tooth driving can be used in a specific small space, and the load of the bearing is increased by more than fifty percent on the original basis; the sealing ring with the double sealing lips can greatly improve the sealing property, the double sealing lips can avoid the problems that grease overflows and dust and sand grains enter the raceway due to upward upwarping of the sealing strip, an effective protection effect is achieved on the rolling body and the raceway, and the service life of the bearing is further prolonged.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view of a partial structure of the present invention;

fig. 4 is a schematic structural view of the sealing ring of the present invention;

fig. 5 is a schematic view of the installation of the sealing ring of the present invention;

FIG. 6 is a schematic view of a conventional seal;

fig. 7 is a schematic view of the installation of a conventional seal before modification.

In the figure: the structure comprises a rotary support 1, an inner ring 11, an outer ring 12, a roller 13, a small step 14, a connecting flange 2, a pinion 3, a speed reducer bearing 4, a pinion bearing 5, a fixed shaft 6, a sealing ring 7, a sealing ring body 71, a sealing lip 72, an upper sealing lip 721, a lower sealing lip 722 and a strong wire spring coil 73.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a straight-tooth drive slewing bearing of heavy load, includes slewing bearing 1, slewing bearing 1 includes inner circle 11 and outer lane 12, evenly be provided with two sets of rollers 13 through two cages between inner circle 11 and the outer lane 12, two sets of rollers 13 are spherical roller, and two sets of roller 13 diameters are the same, change slewing bearing list row of ball structure into double row same diameter ball structure, when satisfying customer's requirement bearing and bear great load, also can accomplish the installation in less installation space, make straight-tooth drive can use and bearing load increase more than fifty percent on original basis in specific less space.

Alternatively, the cage may be replaced with spacer blocks to space adjacent rollers 13.

Inner circle 11 and outer lane 12's upper and lower both sides all are provided with sealing washer 7, and sealing washer 7 includes sealing washer body 71, and one side joint of sealing washer body 71 sets up in the draw-in groove that 11 outside surfaces upper portions of inner circle were seted up, sets up in the draw-in groove that 11 outside surfaces lower parts of sealing washer body 71 one side joint of downside were seted up, and the opposite side of sealing washer body 71 is provided with the seal lip 72 of being connected with outer lane 12, the cross sectional shape of seal lip 72 is "C" shape, seal lip 72 is including setting up respectively at the last seal lip 721 and the lower seal lip 722 of upper and lower both sides, can improve the leakproofness greatly through the sealing washer 7 that uses double seal lip, and double seal lip can avoid leading to grease excessive, dust and grit to get into the problem of raceway because of the upwards perk of sealing strip, has played effectual guard action to rolling element and raceway, and then has prolonged the life of bearing.

Preferably, a small step 14 corresponding to the lower sealing lip 722 is arranged on the inner side of the upper surface of the outer ring 12, when the slewing bearing 1 is installed, the upper sealing lip 721 contacts with the upper surface of the outer ring 12, the lower sealing lip 722 contacts with the small step 14, a cavity between the upper sealing lip 721 and the lower sealing lip 722 is used for accommodating an end surface between the outer ring 12 and the small step 14, the sealing performance of the whole sealing ring can be improved through the upper sealing lip 721 and the lower sealing lip 722, when the outer sealing lip, namely the upper sealing lip 721 deforms and upwarps, an effective sealing effect can be still achieved through the inner sealing lip, namely the lower sealing lip 722, the phenomenon that external dust and impurities enter the raceway to damage the rolling body and the raceway is avoided, when the outer sealing lip is damaged or upwarps, a worker can timely find and replace the outer sealing lip, bearing abrasion caused by the fact that the slewing bearing is still working when the common sealing strip is damaged by upwarps on the sealing strip and the worker does not find and replace the slewing bearing, and the service life of the bearing is prolonged.

Preferably, an annular groove is formed in the other side surface, opposite to the clamping groove, of the sealing ring body 71, a strong wire spring coil 73 is arranged in the annular groove, and the sealing ring 7 is fixed on the inner ring 11 through the strong wire spring coil 73, so that the installation firmness of the sealing ring 7 is improved, and the sealing ring is prevented from falling off when the slewing bearing works.

Preferably, the section curve of the annular groove formed in the seal ring body 71 is an arc with a radian larger than 3.5rad, so that the annular groove can be better clamped and fixed with the strong wire spring ring 73, and the stability is further improved.

Still be provided with flange 2, pinion 3, speed reducer and bear bearing 4, pinion and bear bearing 5 and fixed axle 6 on slewing bearing 1, pinion 3 sets up in slewing bearing 1's casing and the straight-tooth intermeshing on 12 outer lane, and the upper portion outside surface of pinion 3 is provided with speed reducer and bears bearing 4, just the inboard surface mounting in lower part of pinion 3 has pinion to bear bearing 5, and pinion bears bearing 5's inner circle and is provided with fixed axle 6, and pinion 3 passes through pinion and bears bearing 5 in the fixed axle 6 outside and rotates to drive slewing bearing 1 and rotate, flange 2 sets up in speed reducer and bears bearing 4 top for fixed speed reducer.

The non-disclosed part of the utility model is the prior art, and the specific structure, material and working principle are not detailed. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A straight tooth drive slewing bearing of heavy load, includes slewing bearing (1), its characterized in that: the slewing bearing (1) comprises an inner ring (11) and an outer ring (12), two groups of rollers (13) are uniformly arranged between the inner ring (11) and the outer ring (12) through two retainers, the two groups of rollers (13) are spherical rollers, and the diameters of the two groups of rollers (13) are the same;

the upper side and the lower side of the inner ring (11) and the outer ring (12) are both provided with a sealing ring (7), the sealing ring (7) comprises a sealing ring body (71), one side of the sealing ring body (71) is clamped in a clamping groove formed in the upper part of the outer side surface of the inner ring (11), the other side of the sealing ring body (71) is provided with a sealing lip (72) connected with the outer ring (12), the surface of the other side, opposite to the clamping groove, of the sealing ring body (71) is provided with an annular groove, and a strong steel wire spring ring (73) is arranged in the annular groove;

the rotary bearing (1) is further provided with a connecting flange (2), a pinion (3), a speed reducer bearing (4), a pinion bearing (5) and a fixing shaft (6), the pinion (3) is arranged in the shell of the rotary bearing (1) and is meshed with straight teeth on an outer ring (12), the upper outer side surface of the pinion (3) is provided with the speed reducer bearing (4), the lower inner side surface of the pinion (3) is provided with the pinion bearing (5), the inner ring of the pinion bearing (5) is provided with the fixing shaft (6), and the connecting flange (2) is arranged above the speed reducer bearing (4).

2. A heavy-duty straight-tooth drive slewing bearing according to claim 1, wherein: the cross-sectional shape of the sealing lip (72) is 'C' shaped.

3. A heavy-duty straight-tooth drive slewing bearing according to claim 2, wherein: the seal lip (72) comprises an upper seal lip (721) and a lower seal lip (722) which are respectively arranged at the upper side and the lower side.

4. A heavy-duty straight-tooth drive slewing bearing according to claim 3, wherein: the inner side of the upper surface of the outer ring (12) is provided with a small step (14) corresponding to the lower sealing lip (722), the upper sealing lip (721) is contacted with the upper surface of the outer ring (12) when the slewing bearing (1) is installed, and the lower sealing lip (722) is contacted with the small step (14).

5. A heavy-duty spur-drive slewing bearing according to claim 1, characterized in that: the section curve of the annular groove formed in the sealing ring body (71) is an arc.